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BULLETIN 1
Researchers Reveal How Plants Hit the Reset Button After Stress
Researchers Reveal How Plants Hit the Reset Button After Stress
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April 29, 2026
When plants face harsh conditions, such as extreme cold or high salt levels, they do not just stop growing by accident; their bodies actively manage the crisis at the microscopic level. Once the "stress" ends, plants try to bounce back and return to normal growth, but the specific biological switches that manage this recovery process have long been a mystery to scientists.
To solve this, University of British Columbia researchers studied how different plants, such as grasses and clover-like weeds, tolerate salt, cold, and heat. They discovered that during cold or salty conditions, the plants use a "pause and play" strategy. They park their cell-building process in a specific waiting phase, held in place by two key proteins that act as biological brakes. Once the environment improves, the plants release these brakes, allowing growth to resume right where it left off. This suggests that plants have a built-in, universal system for hitting the pause button to survive tough times without permanently breaking their growth cycle.
Read more from the research article published in New Phytologist.
See https://www.isaaa.org/kc/cropbiotechupdate/article/default.asp?ID=21786
To solve this, University of British Columbia researchers studied how different plants, such as grasses and clover-like weeds, tolerate salt, cold, and heat. They discovered that during cold or salty conditions, the plants use a "pause and play" strategy. They park their cell-building process in a specific waiting phase, held in place by two key proteins that act as biological brakes. Once the environment improves, the plants release these brakes, allowing growth to resume right where it left off. This suggests that plants have a built-in, universal system for hitting the pause button to survive tough times without permanently breaking their growth cycle.
Read more from the research article published in New Phytologist.
See https://www.isaaa.org/kc/cropbiotechupdate/article/default.asp?ID=21786
BULLETIN 2
First Gap-Free Peanut Genomes Reveal Genes for Bigger Seeds and Better Oils
First Gap-Free Peanut Genomes Reveal Genes for Bigger Seeds and Better Oils
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April 29, 2026
An international team of researchers, led by Murdoch University, has successfully sequenced the first complete, gap-free genomes of six peanut varieties, providing a definitive blueprint for agricultural improvement. Published in Nature Genetics, this telomere-to-telomere (T2T) assembly identifies two critical genes, AhWRI1, which can increase seed oil content from 48% to 54%, and AhGSA1, which is linked to a 70% increase in seed weight.
The study overcame the immense challenge of the peanut's complex genetic structure, which contains four sets of chromosomes and vast amounts of repetitive DNA that previously left significant dark regions in its sequence. By analyzing 521 peanut accessions from across the globe, the team discovered that the two subgenomes of the cultivated peanut have evolved asymmetrically, with one half undergoing much more structural change than the other. This finding explains why certain peanut varieties, such as var. hirsuta, possess unique traits like distinct plant architecture and lipid metabolism that are absent in other subspecies like var. hypogaea.
Beyond increasing crop value, these findings hold significant implications for global food security and sustainable farming. Peanuts are a vital source of protein and oil for hundreds of millions of people, particularly in developing regions, and their nitrogen-fixing capabilities make them essential for healthy crop rotations. Professor Rajeev Varshney, Director of the Centre for Crop and Food Innovation, noted that while a gap-free human genome was only achieved four years ago, reaching this milestone for the complex peanut genome provides a transformative toolkit for creating resilient crops that can better withstand environmental shocks.
For more details, read the article in Murdoch University News.
See: https://www.isaaa.org/kc/cropbiotechupdate/article/default.asp?ID=21797
The study overcame the immense challenge of the peanut's complex genetic structure, which contains four sets of chromosomes and vast amounts of repetitive DNA that previously left significant dark regions in its sequence. By analyzing 521 peanut accessions from across the globe, the team discovered that the two subgenomes of the cultivated peanut have evolved asymmetrically, with one half undergoing much more structural change than the other. This finding explains why certain peanut varieties, such as var. hirsuta, possess unique traits like distinct plant architecture and lipid metabolism that are absent in other subspecies like var. hypogaea.
Beyond increasing crop value, these findings hold significant implications for global food security and sustainable farming. Peanuts are a vital source of protein and oil for hundreds of millions of people, particularly in developing regions, and their nitrogen-fixing capabilities make them essential for healthy crop rotations. Professor Rajeev Varshney, Director of the Centre for Crop and Food Innovation, noted that while a gap-free human genome was only achieved four years ago, reaching this milestone for the complex peanut genome provides a transformative toolkit for creating resilient crops that can better withstand environmental shocks.
For more details, read the article in Murdoch University News.
See: https://www.isaaa.org/kc/cropbiotechupdate/article/default.asp?ID=21797
SCIENTIFIC NEWS
Review
Calcium signaling in crops
Chunxia Zhang, Yang Song, Jörg Kudla
New Phytol.; 2026 Feb; 249(4):1644-1658. doi: 10.1111/nph.70796.
Review
Calcium signaling in crops
Chunxia Zhang, Yang Song, Jörg Kudla
New Phytol.; 2026 Feb; 249(4):1644-1658. doi: 10.1111/nph.70796.
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Abstract
Calcium (Ca2+) signaling is integral to nearly all aspects of plant biology, including development and responses to biotic and abiotic stresses. It operates through two main layers: the generation of Ca2+ signals and their decoding by Ca2+-binding proteins, which act early in diverse signaling pathways. The system exhibits remarkable robustness and versatility, largely due to its network-like organization. While fundamental principles of Ca2+ signaling were initially established in noncrop model organisms, recent research has increasingly expanded toward major crop species and has demonstrated that natural and synthetically created variation in Ca2+ signaling components can shape agronomically important traits. In this review, we first provide a concise overview of the fundamental principles of plant Ca2+ signaling and then synthesize the current status of this research field in major crop plants. We discuss why exploiting existing natural and engineering synthetic genetic diversity in Ca2+ signaling components offers promising strategies to enhance crop stress resilience and yield stability. Subsequently, we delineate how - aided by artificial intelligence - superior alleles can be identified and/or created and incorporated into elite crop genomes. Finally, we discuss current challenges and emerging perspectives in translating Ca2+ signaling research into practical applications for crop improvement.
See https://pubmed.ncbi.nlm.nih.gov/41367079/
See https://pubmed.ncbi.nlm.nih.gov/41367079/
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Figure:
Functions of Ca2+ signaling in stress responses in Arabidopsis. (a) Schematic illustration of Ca2+ signaling involved in responses to salt, drought stresses, and nutrient homeostasis. (b) Ca2+ signaling in pathogen‐associated molecular pattern (PAMP)‐triggered immunity (PTI) and effector‐triggered immunity (ETI). Further details are provided in the main text.
Functions of Ca2+ signaling in stress responses in Arabidopsis. (a) Schematic illustration of Ca2+ signaling involved in responses to salt, drought stresses, and nutrient homeostasis. (b) Ca2+ signaling in pathogen‐associated molecular pattern (PAMP)‐triggered immunity (PTI) and effector‐triggered immunity (ETI). Further details are provided in the main text.
