New Method Could Significantly Reduce Agricultural Greenhouse Gas Emissions May 30, 2024
Introduction:
(Eurekalert) Nitrogen fertilization leads to emissions of the greenhouse gas nitrous oxide (N₂O) from agricultural soils, accounting for a significant portion of total greenhouse gas emissions from agriculture. It has long been assumed that these N₂O emissions are unavoidable.
However, an international team of researchers led by NMBU has discovered a method to reduce these emissions. They have identified bacteria that can "consume" nitrous oxide as it forms in the soil, preventing the gas from escaping into the atmosphere. The researchers believe that this method alone has the potential to reduce agricultural nitrous oxide emissions in Europe by one-third.
Gene Discovery Could Lead to Resilient “Pixie” Corn by Dave Roepke
May 29, 2024
Introduction:
(Futurity) Researchers have identified a widely found gene in plants as a key transporter of a hormone that influences the size of corn.
The discovery offers plant breeders a new tool to develop desirable dwarf varieties that could enhance the crop’s resilience and profitability.
A team of scientists spent years working to pinpoint the functions of the gene ZmPILS6. Now, they have been able to characterize it as an important driver of plant size and architecture, a carrier for an auxin hormone that helps govern growth in roots below ground and shoots, or stalks, above ground.
Their findings are published in the Proceedings of the National Academy of Sciences.
“A hallmark of the current age of science is that we have all this high-quality genome data, whether for corn or humans or other organisms, and now we have the task of figuring out what the genes actually do,” says Dior Kelley, assistant professor of genetics, development and cell biology at Iowa State University, who led the research team.
Greenhouses Cover More and More of Earth’s Surface June 3, 2024
Introduction:
(Eurekalert) We have long since become accustomed to enjoying tomatoes, cucumbers, berries and melons year-round. In Europe, most of these imports come from Spain, where millions of tons of fruit and vegetables are grown under seas of white plastic that span the southern part of the country.
Globally, greenhouse cultivation is increasing rapidly, according to a new study from the University of Copenhagen that maps the global extent of greenhouses. But the majority of this boom is happening outside of Europe, it is taking place in low- and middle-income countries in the Global South.
Using a combination of deep learning algorithms and modern sources of satellite imagery, the researchers mapped the amount of land used for greenhouse cultivation worldwide. Their mapping shows that greenhouse cultivation – whether it takes place in glass houses or open fields wrapped in plastic films – covers at least 1.3 million hectares of the Earth's surface. The new figure is nearly three times more than previous estimates.
China in first place, by far
Greenhouse cultivation is spread over 119 different countries, of which China accounts for an entire 60.4% of the total area. Spain and Italy occupy second and third place with 5.6% and 4.1% of global greenhouse coverage respectively.
Whereas large clusters of greenhouses in the Global North were established in the 1970’s and '80s, they began to spring up in the Global South two decades later. And while there has been some stagnation in the Global North, the trajectory of growth continues in Asia, Africa and Central and South America. Indeed, greenhouses in the Global South account for 2.7 times as much area as in the Global North.
Tiny Crop-health Sensors Could Help Cut the Cost of Groceries June 5, 2024
Introduction:
(Eurekalert) A compact, lightweight sensor system with infrared imaging capabilities developed by an international team of engineers could be easily fitted to a drone for remote crop monitoring.
This flat-optics technology has the potential to replace traditional optical lens applications for environmental sensing in a range of industries.
This innovation could result in cheaper groceries as farmers would be able to pinpoint which crops require irrigation, fertilisation and pest control, instead of taking a one-size-fits-all approach, thereby potentially boosting their harvests.
The sensor system can rapidly switch between edge detection – imaging the outline of an object, such as a fruit – and extracting detailed infrared information, without the need for creating large volumes of data and using bulky external processors.
The capability to switch to a detailed infrared image is a new development in the field and could allow farmers to collect more information when the remote sensor identifies areas of potential pest infestations.
Discovery of a Gene for Immunity that Protects Against a Disease that Ravages Rice and Wheat Crops June 5, 2024
Complete article less photograph and hyperlinks:
(Eurekalert) Blast disease, caused by the fungus Magnaporthe oryzae, is a veritable plague in agriculture. In addition to devastating rice crops – the staple food of 60% of the world’s population – it began attacking wheat in the 1980s, across a growing area of distribution and with a serious risk of emergence in Europe.
In this context, researchers from INRAE, CIRAD and the Université de Montpellier, together with scientists from China and the Philippines, analysed the molecular mechanisms behind a natural resistance to blast found in rice. They identified Ptr, a new type of disease resistance gene in plants. The presence of this Ptr gene makes rice immune to strains of M. oryzae that secrete AVR-Pita virulence factor, a protein that, in the absence of this gene, helps the pathogenic fungus invade the plant.
The majority of resistance genes in plants code for antenna-like receptors (proteins) that recognise chemical signals emitted by pathogens.
Ptr, however, codes for a new type of protein, not previously known to be active in plant immune systems. Scientists do not yet understand how this protein works. Unexpectedly, this research invalidates previous reference studies, published in 2000, that reported that another gene named Pi-ta and coding for a conventional type of immune receptor was responsible for AVR-Pita detection.
This work paves the way to the study of new resistance mechanisms in plants based on Ptr protein and other new components, with the aim of better understanding natural resistance to disease and using it more effectively for crop protection.
Fine-tuning Leaf Angle with CRISPR Improves Sugarcane Yield June 10, 2024
Introduction:
(Eurekalert) Sugarcane is the world’s largest crop by biomass yield, providing 80 percent of the sugar and 40 percent of the biofuel produced worldwide. The plant’s size and efficient use of water and light make it a prime candidate to produce advanced renewable, value-added bioproducts and biofuels.
However, as a hybrid of Saccharum officinarum and Saccharum spontaneum, sugarcane has the most complex genome of all crops. This complexity means that improving sugarcane through conventional breeding is challenging. Because of this, researchers turn to gene editing tools, such as the CRISPR/Cas9 system to precisely target the sugarcane genome for improvement.
In their new paper, published in Plant Biotechnology Journal, a team of researchers from the University of Florida at the Center for Advanced Bioenergy and Bioproducts Innovation (CABBI) has leveraged this genetic complexity to their advantage to use the CRISPR/Cas9 system to fine-tune leaf angle in sugarcane. These genetic tweaks allowed the sugarcane to capture more sunlight, which in turn increased the amount of biomass produced.
This work supports the DOE-funded CABBI Bioenergy Research Center’s “plants as factories” approach and the primary goal of its Feedstock Production research — to synthesize biofuels, bioproducts, and high-value molecules directly in the stems of plants such as sugarcane.
The sugarcane genome’s complexity is due in part to its high levels of redundancy: It possesses many copies of each gene. The phenotype that a sugarcane plant displays, therefore, typically depends on the cumulative expression of the multiple copies of a certain gene. The CRISPR/Cas9 system is perfect for this task because it can be designed to edit few or many copies of a gene at once.
Planetary Health Diet Associated with Lower Risk of Premature Death, Lower Environmental Impact June 10, 2024
Introduction:
(Eurekalert) Key takeaways:
• People whose diets most closely adhered to the Planetary Health Diet (PHD) had 30% lower risk of premature death compared to those with the lowest adherence.
• Every major cause of death, including cancer, heart disease, and lung disease, was lower with greater adherence to this dietary pattern.
• Diets adhering to the PHD pattern had substantially lower environmental impact, including 29% lower greenhouse gas emissions and 51% less land use.
Boston, MA—People who eat a healthy, sustainable diet may substantially lower their risk of premature death in addition to their environmental impact, according to a new study led by Harvard T.H. Chan School of Public Health. It is the first large study to directly evaluate the impacts of adherence to recommendations in the landmark 2019 EAT-Lancet report. The researchers have named the dietary pattern outlined in the report—which emphasizes a variety of minimally processed plant foods but allows for modest consumption of meat and dairy foods—the Planetary Health Diet (PHD).
caltrek wrote: ↑Mon Apr 01, 2024 3:26 pm Vaccine Protects Cattle from Bovine Tuberculosis March 28, 2024
Introduction:
(Eurekalert) UNIVERSITY PARK, Pa. — Bovine tuberculosis (TB) is a livestock disease that results in large economic losses to animal agriculture worldwide. The disease can also transmit to humans and cause severe illness and death. Researchers from Penn State, Addis Ababa University and the University of Cambridge have now demonstrated that a vaccine for TB currently used in humans significantly reduces infectiousness of vaccinated livestock, improving prospects for elimination and control. The study published today (March 28) in the journal Science.
The spillover of infection from livestock has been estimated to account for about 10% of human tuberculosis cases. While such zoonotic TB (zTB) infections are most commonly associated with gastrointestinal infections related to drinking contaminated milk, zTB can also cause chronic lung infections in humans. Lung disease caused by zTB can be indistinguishable from regular tuberculosis but is more difficult to treat due to natural antibiotic resistance in the cattle bacteria.
“For over a hundred years, programs to eliminate bovine tuberculosis have relied on intensive testing and slaughtering of infected animals,” said Vivek Kapur, professor of microbiology and infectious diseases and Huck Distinguished Chair in Global Health at Penn State and a corresponding author of the study. “This approach is unimplementable in many parts of the world for economic and social reasons, resulting in considerable animal suffering and economic losses from lost productivity, alongside an increased risk of spillover of infection to humans. By vaccinating cattle, we hope to be able to protect both cattle and humans from the consequences of this devastating disease.”
In the study, carried out in Ethiopia, the researchers examined the ability of the vaccine, Bacillus Calmette-Guérin (BCG), to directly protect cattle that receive it, as well as to indirectly protect both vaccinated and unvaccinated cattle by reducing transmission. They placed vaccinated and unvaccinated animals into enclosures with naturally infected animals in a novel crossover design performed over two years.
“Our study found that BCG vaccination reduces TB transmission in cattle by almost 90%,” said Andrew Conlan, associate professor of epidemiology at the University of Cambridge and a corresponding author of the study. “Vaccinated cows also developed significantly fewer visible signs of TB than unvaccinated ones. This suggests that the vaccine not only reduces the progression of the disease, but that if vaccinated animals become infected, they are also substantially less infectious to others.”
caltrek’s comment: I have been down lately on the idea that humans should be eating beef. Perhaps one way to discourage the conspiratorial minded anti-vaxers is to point out that their beef has been vaccinated.
I am so bad.
I'm not an anti vaxxer - but I know enough of them, who like me, are beef eaters. Yeah, you might be down on humans eating beef, but the only thing that'll stop us is actually removing beef from the stores or making them completely unaffordable. As long as people like me can eat beef, we will eat beef.
caltrek’s comment: I have been down lately on the idea that humans should be eating beef. Perhaps one way to discourage the conspiratorial minded anti-vaxers is to point out that their beef has been vaccinated.
I am so bad.
I'm not an anti vaxxer - but I know enough of them, who like me, are beef eaters. Yeah, you might be down on humans eating beef, but the only thing that'll stop us is actually removing beef from the stores or making them completely unaffordable. As long as people like me can eat beef, we will eat beef.
I have gotten the message that many of you are confirmed beef eaters. It is not one of those issues that I think should be forced upon the population by government regulation. If that is your choice, it can and should be respected.
I am only concerned that people make an informed choice as to the health advantages of a plant-based diet versus one that relies heavily on beef and other types of meat consumption.
This is also true of environmental advantages of plant-based diets over heavy beef consumption. I think it is unrealistic to expect everybody to do everything possible to reduce greenhouse gas emissions. For me to think otherwise would be hypocritical as I still own and drive a gasoline powered vehicle. I try to keep my driving to minimum, but that is difficult here in California. So, I am at least comfortable in having switched to a 100% plant-based diet because it is one thing that I can and have done to minimize my negative impact on the environment.
Further, some minimal level of beef consumption can be accommodated in a sustainable way that also involves relatively humane ways of slaughter. All animals must eventually die, so working that fact into our diet choices is reasonable. We can acknowledge all that and still oppose inhumane types of slaughter practices. Just as we can support free range versus confined space growth of cattle. I suspect that also leads to a healthier diet and tastier food products.
(Eurekalert) Sweetpotato black rot is a devastating disease caused by the fungus Ceratocystis fimbriata. Since the late 1800s, black rot of sweetpotato has threatened to destroy as much as 30% of the sweetpotato crop in the United States. In 2015, all sweetpotato-producing states in the United States experienced one of the worst outbreaks recorded in history, with up to 60% losses reported. While fungicides can help manage the disease, they are not a sustainable solution, especially with volatile restrictions on fungicide residues among major export markets. An additional management strategy is effector-assisted breeding—a novel approach to developing disease-resistant crops.
Effectors are secreted proteins from pathogens that modulate their plant hosts at the molecular and cellular levels. Instead of traditional breeding methods, which can take many years and involve extensive trial and error, effector-assisted breeding uses specific effectors from the pathogen to quickly identify and select plants that have resistance to the disease. This will accelerate breeding programs, leading to the development of black rot–resistant sweetpotato varieties and the reduction of crop losses.
caltrek’s comment: I have been down lately on the idea that humans should be eating beef. Perhaps one way to discourage the conspiratorial minded anti-vaxers is to point out that their beef has been vaccinated.
I am so bad.
I'm not an anti vaxxer - but I know enough of them, who like me, are beef eaters. Yeah, you might be down on humans eating beef, but the only thing that'll stop us is actually removing beef from the stores or making them completely unaffordable. As long as people like me can eat beef, we will eat beef.
I have gotten the message that many of you are confirmed beef eaters. It is not one of those issues that I think should be forced upon the population by government regulation. If that is your choice, it can and should be respected.
I am only concerned that people make an informed choice as to the health advantages of a plant-based diet versus one that relies heavily on beef and other types of meat consumption.
This is also true of environmental advantages of plant-based diets over heavy beef consumption. I think it is unrealistic to expect everybody to do everything possible to reduce greenhouse gas emissions. For me to think otherwise would be hypocritical as I still own and drive a gasoline powered vehicle. I try to keep my driving to minimum, but that is difficult here in California. So, I am at least comfortable in having switched to a 100% plant-based diet because it is one thing that I can and have done to minimize my negative impact on the environment.
Further, some minimal level of beef consumption can be accommodated in a sustainable way that also involves relatively humane ways of slaughter. All animals must eventually die, so working that fact into our diet choices is reasonable. We can acknowledge all that and still oppose inhumane types of slaughter practices. Just as we can support free range versus confined space growth of cattle. I suspect that also leads to a healthier diet and tastier food products.
Fair - but while reduced beef consumption might be doable, "minimal" I don't think is in the cards...
New Study Emphasizes Tradeoffs Between Arresting Groundwater Depletion and Food Security June 14, 2024
Introduction:
(Eurekalert) Washington DC, June 14, 2024: A study by authors from the International Food Policy Research Institute (IFPRI), published today in Nature Sustainability, reaffirms the world’s growing dependence on depleting groundwater systems. Although efforts to slow down groundwater depletion need to be urgently accelerated, this study indicates that such efforts – in the absence of other accompanying measures – would likely lead to significant food security impacts. The study finds that ending groundwater depletion would lead to sharp declines in food production, especially of rice and wheat, in groundwater-dependent food production systems, pushing up international prices of rice by 7.4% and wheat by 6.7%. Higher food prices, in turn, would make food less affordable for the poor, increasing the number of people at risk of hunger by 24 million, particularly in low- and middle-income countries.
While growing groundwater use has benefited economic development and improved food security, it has also led to severe water depletion and ecosystem degradation, reduced freshwater access, and increased inequity. A quarter of the world’s river basins are already overexploited, including key breadbasket areas in India, Pakistan, China, Iran, the US, and Egypt. Climate change is pushing more farmers to rely on groundwater as rainfed farming is becoming less viable and surface flows are shrinking.
(Eurekalert) Researchers from the University of Tokyo performed the first study to quantify highly processed food consumption and to investigate its association with diet quality among Japanese children and adolescents. Highly processed foods (HPFs) accounted for over one-fourth of the total energy intake amongst youths. Consumption was negatively associated with the intake of healthy foods, such as fruits, vegetables and pulses, and positively associated with the consumption of confectioneries.
It's common knowledge that poor-quality diets are considered major risk factors for many health issues and even noncommunicable diseases such as Type 2 diabetes. Therefore, researchers seek to understand factors related to diet quality as a way to improve people’s health. Research on HPFs has been rapidly increasing, highlighting their potential impact on public health. However, few studies have been conducted in Japan, with none focusing on children and adolescents, due to challenges in assessing them.
“Our previous research on HPF consumption in adults in Japan found that higher consumption was negatively associated with diet quality. This significant finding prompted us to investigate whether similar associations exist in younger generations,” said Assistant Professor Nana Shinozaki from the School of Public Health. “My team and I ran a cross-sectional study, one where many people are assessed in a short space of time rather than fewer people over a long period of time, to understand the association between HPF consumption and overall diet quality among Japanese children and adolescents. We found that higher HPF consumption is associated with poorer diet quality in 1,318 participants aged 3-17 years.”
This probably doesn’t come as a surprise to many, but it’s important to note that this is the first time hard data has been put to this specific demographic, and that fact might aid in improving public health. One of the difficulties in research on diets is that so many of the issues lack precise definitions. For this reason, Shinozaki and her team picked an existing dietary classification framework developed by researchers at the University of North Carolina at Chapel Hill (UNCCH) in the U.S. to classify the food that participants consumed, and the Healthy Eating Index-2020 and the Nutrient-Rich Food Index 9.3 to evaluate the quality of their diets. Under the UNCCH classification, HPFs are defined as “multi-ingredient, industrially formulated mixtures processed to the extent that they are no longer recognizable as their original plant/animal source.”
American Diets Have a Long Way to Go to Achieve Health Equity June 17, 2024
Introduction:
(Eurekalert) Poor diet continues to take a toll on American adults. It’s a major risk factor for obesity, type 2 diabetes, cardiovascular disease, and certain cancers, and more than one million Americans die every year from diet-related diseases, according to the Food and Drug Administration. Poor diet and food insecurity is also costly, attributing to an estimated $1.1 trillion in healthcare expenditures and lost productivity. These burdens also contribute to major health disparities by income, education, zip code, race, and ethnicity.
In a study from the Food is Medicine Institute at the Friedman School of Nutrition Science and Policy at Tufts University published today in the Annals of Internal Medicine, researchers found that diet quality among U.S. adults improved modestly between 1999 and 2020. However, they also found that the number of Americans with poor diet quality remains stubbornly high. Most notably, disparities persist and, in some cases, are worsening.
“While we’ve seen some modest improvement in American diets in the last two decades, those improvements are not reaching everyone, and many Americans are eating worse,” says Dariush Mozaffarian, cardiologist and director of the Food is Medicine Institute, and senior author on the study. “Our new research shows that the nation can’t achieve nutritional and health equity until we address the barriers many Americans face when it comes to accessing and eating nourishing food.”
Advanced Artificial Intelligence: a Revolution for Sustainable Agriculture June 18, 2024
Introduction:
(Eurekalert) The rise of advanced artificial intelligence (edge AI) could well mark the beginning of a new era for sustainable agriculture. A recent study proposes a roadmap for integrating this technology into farming practices. The aim? To improve the efficiency, quality and safety of agricultural production, while addressing a range of environmental, social and economic challenges.
One of the main objectives of sustainable agricultural practices is to efficiently feed a growing world population. Digital technology, such as artificial intelligence (AI), can bring substantial benefits to agriculture by improving farming practices that can increase the efficiency, yield, quality and safety of agricultural production. Edge AI refers to the implementation of artificial intelligence in an advanced computing environment. "This technology enables calculations to be carried out close to where the data is collected, rather than in a centralized cloud computing facility or off-site datacenter," explains Moussa El Jarroudi, researcher in Crop Environment and Epidemiology at the University of Liège (Belgium). This means devices can make smarter decisions faster, without connecting to the cloud or off-site datacenters."
In a new study published in the scientific journal Nature Sustainability, a scientific team led by Moussa El Jarroudi, demonstrates how to overcome these challenges and how AI can be practically integrated into agricultural systems to meet the growing needs of sustainable food production. "Deploying AI in agriculture is not without its challenges. It requires innovative solutions and the right infrastructure. Experts like Professor Said Hamdioui of Delft University of Technology have developed low-energy systems capable of operating autonomously." Although challenges remain, particularly in the context of climate change, the prospects opened up by these advances are promising.
Conclusion:
The applications are vast: improving crop management with real-time data, optimizing the use of resources such as water and fertilizers, reducing post-harvest losses and increasing food safety, or enhancing monitoring and response capabilities to changing weather conditions. This study paves the way for smarter, more environmentally-friendly agriculture, thanks to edge AI. A technological revolution that could well transform the way we produce and consume.
Plant-sourced Nitrate Proves Positive to Human Health June 24, 2024
Introduction:
(Eurekalert) New research from Edith Cowan University (ECU) has found that nitrate from plant sources is associated with a lower risk of mortality while nitrate from other sources such as animal-based foods, processed meat and tap water, is linked to a higher risk of mortality.
Nitrate, a compound found in vegetables, meat, and drinking water, has been the subject of debate due to its potential impact on health. Emerging evidence suggests that dietary nitrate may play a role in preventing cardiovascular disease (CVD), dementia, and diabetes. However, concerns about a potential link between nitrate ingestion and cancer have led to uncertainties surrounding the consumption of high-nitrate leafy green vegetables.
ECU’s Dr Nicola Bondonno led the project which has found that among 52,247 participants of the Danish Diet Cancer and Health Study, moderate to high intakes of plant and vegetable sourced nitrate were associated with a 14% to 24% lower risk of all-cause, CVD-related, and cancer-related mortality.
While the research could not attribute plant-based nitrate as the sole contributor to human health, given that plants and vegetables contained a range of other protective compounds which themselves were associated with a lower risk of CVD, cancer and mortality, the research underscored the value of higher intakes of nitrate-rich vegetables to mitigate mortality risks.
The research also added to the growing evidence that there was no cause for concern regarding cancer risks from the consumption of nitrate-rich vegetables such as leafy green vegetables and beetroot.
caltrek’s comment: Before I retired and as a manager, I had a lot of experience in dealing with the problem of nitrate in drinking water. So, I often wondered about the question of nitrates from food, at least from animal-based food. The article cited above goes a long way in answering that question, subject to further research.
UN Publishes Proposals for Sharing Benefits from Plant, Animal, and Microbial DNA Sequences June 30, 2024
Introduction:
(Eurekalert) Montreal - New UN documents today provide proposals and options to meet a global pledge to share fairly some of the multi-trillion-dollar revenues and other benefits derived from products produced, improved or related to the use of “digital sequence information on genetic resources (DSI)” -- the DNA sequences of plants, animals and microbes.
A positive outcome would help address an outstanding gap in efforts to share the benefits derived from the use of genetic resources. A new multilateral mechanism was pledged by the UN Convention on Biological Diversity’s 196 Parties in 2022 at COP 15.
Agreement is needed on several questions, including which industrial sectors using DSI should share its benefits.
Top candidates include sectors creating and improving drugs, cosmetics, seeds and agricultural biotechnology.
The documents are published six weeks before nations meet in Montreal 12-16 August for final negotiations within the DSI intergovernmental negotiating group before the matter comes up for decision at the UN biodiversity Conference (COP 16) in October, in Cali, Colombia.
Intake of Ultra-processed Foods Linked with Increased Risk of Death June 30, 2024
Introduction:
(Eurekalert) Chicago (June 30, 2024) — In a new study, older adults who reported consuming higher amounts of ultra-processed foods, as defined by the NOVA classification system, were about 10% more likely to die over a median follow-up of 23 years compared with those who consumed less processed food.
The findings are based on a large study that has tracked over half a million U.S. adults for nearly three decades. According to the results, higher intake of ultra-processed foods was associated with modest increases in death from any cause and from deaths related specifically to heart disease or diabetes, but no association was found for cancer-related deaths.
“Our study results support a larger body of literature, including both observational and experimental studies, which indicate that ultra-processed food intake adversely impacts health and longevity,” said Erikka Loftfield, PhD, Stadtman Investigator at the National Cancer Institute. “However, there is still a lot that we don’t know, including what aspects of ultra-processed foods pose potential health risks.”
Loftfield will present the findings at NUTRITION 2024, the flagship annual meeting of the American Society for Nutrition held June 29–July 2 in Chicago.
The research drew data from more than 540,000 people who provided information about their eating habits and health in the mid-1990s, when they were between 50 and 71 years of age. Over half of the participants have since died. The researchers analyzed overall rates of death among those who were in the 90th percentile for consumption of ultra-processed foods at baseline versus those in the 10th percentile, and also looked at associations with specific foods and specific diseases.
Tomato Timekeeper: NF-YA3b Gene's Role in Flowering Time Revealed July 4, 2024
Introduction:
(Eurekalert) Controlling the timing of flowering in crops is crucial for optimizing yields and adapting to climate changes. A recent study has identified a specific gene in tomatoes that regulates this critical phase, providing a significant step forward in the ability to fine-tune agricultural practices and enhance productivity.
Flowering time is crucial for crop yield and quality, directly affecting seed and fruit production. While extensive research has focused on flowering regulation in model plants like Arabidopsis and rice, the mechanisms in tomatoes remain less understood. In tomatoes, flowering time impacts both yield and the synchronization of fruit production, which is vital for commercial farming. Addressing these challenges requires in-depth research to uncover the genetic factors controlling flowering time in tomatoes, aiming to enhance crop management practices and boost agricultural productivity.
A team from Huazhong Agricultural University, along with collaborators from Northwest A&F University, Zhumadian Academy of Agricultural Sciences, and the University of Idaho, published their findings (DOI: 10.1093/hr/uhae088) in the journal Horticulture Research on April 2, 2024. They discovered that the gene SlNF-YA3b regulates flowering time in tomatoes by binding to the promoter of the SINGLE FLOWER TRUSS (SFT) gene. The study explored the NF-Y transcription factor family, focusing on the NF-YA subunit, SlNF-YA3b. Using CRISPR/Cas9 technology, researchers created tomato plants with knocked-out SlNF-YA3b, leading to significantly earlier flowering compared to wild-type plants. Conversely, overexpressing SlNF-YA3b delayed flowering. Biochemical assays confirmed that SlNF-YA3b binds directly to the CCAAT elements of the SFT gene promoter, repressing its expression. This suggests that SlNF-YA3b functions as a flowering time repressor in tomatoes. The study’s findings highlight the critical role of SlNF-YA3b in regulating flowering time, offering new insights into the molecular mechanisms of tomato flowering. These discoveries pave the way for genetic manipulation to control flowering time, potentially improving crop yield and synchronization, thereby enhancing agricultural productivity and efficiency.
The discovery of SlNF-YA3b's role in flowering time regulation has significant potential applications in agriculture. By manipulating this gene, it may be possible to control the timing of flowering to optimize fruit production and improve crop resilience to environmental changes. This research offers a promising path for enhancing the efficiency and productivity of tomato cultivation.
Pear-derived Discovery: A Genetic Mechanism to Fortify Crops Against Drought July 4, 2024
Introduction:
(Eurekalert) A pivotal study has shed light on a critical genetic mechanism that boosts plants' ability to withstand drought. The research uncovers the role of the transcription factor PbERF3, native to wild pears, which works in concert with the protein PbHsfC1a to regulate genes key to drought tolerance. This breakthrough could significantly inform the cultivation of crops with superior resilience to water shortages, offering a vital solution to the pressing environmental demands of our time.
Drought significantly impacts agricultural productivity and plant survival. Traditional methods for improving drought resistance, such as selective breeding and genetic modification, have had limited success. Therefore, identifying genetic components that enhance drought tolerance is crucial. Research has shown that understanding and manipulating these genetic factors can lead to the development of more resilient crops. Due to these challenges, there is a pressing need to delve deeper into the genetic mechanisms of drought resistance to develop effective solutions for sustainable agriculture.
A team of scientists from the College of Horticulture at Nanjing Agricultural University has published a study (DOI: 10.1093/hr/uhae090) on March 30, 2024, in Horticulture Research. The research focuses on the transcription factor PbERF3 from wild pear, demonstrating its role in enhancing drought resistance by interacting with another protein, PbHsfC1a. This interaction regulates the expression of genes involved in hydrogen peroxide transport and abscisic acid biosynthesis, critical for drought tolerance.
The study demonstrates that overexpressing PbERF3 in pear callus and Arabidopsis enhances drought resistance by restoring redox balance and activating key drought stress pathways. PbERF3 interacts with PbHsfC1a, forming a heterodimer that binds to the promoters of PbPIP1;4 and PbNCED4, which are essential for hydrogen peroxide transport and abscisic acid biosynthesis. This interaction activates critical signaling pathways that improve drought tolerance. Silencing PbERF3 resulted in reduced drought resistance, underscoring its vital role in stress response. Additionally, the research shows that PbERF3 directly stimulates the transcription of PbPIP1;4, enhancing the plant's ability to manage oxidative stress. These findings reveal a novel regulatory module that plants use to combat drought stress, providing insights into developing genetically modified crops with improved drought resistance.
