Scientists Trace Evolution of Abscisic AcidNovember 3, 2016
An international research team from Germany, Australia, and the USA has studied the evolution of the phytohormone abscisic acid (ABA). The study focused on the hormone's role in water balance and pore regulation. ABA is key for drought tolerance in plants, for when plants are water-stressed, ABA closes the stomates to prevent wilting. However, the role of ABA in ferns and other lycophytes remains unclear.
The research team has determined that ABA plays a key role in determining the sex of ferns, using a mechanism that was co-opted by flowering plants to tolerate desiccation. They found the homologous fern gene responsible for ABA signaling. They also found that the proteins produced when the ABA signaling pathway is turned on do not interact with proteins that would open and close stomates. They realized that regulating stomate closing by ABA was new to angiosperms, which evolved from ferns about 150 million years ago. They also found that ABA promotes femaleness in plants, and is linked to spore dormancy in ferns.
The Crop Biotech Update is a weekly newsletter of ISAAA, a non-for-profit organization. The CBU is distributed for free to over 23,000 subscribers worldwide to inform them about the key developments in biosciences, especially in agricultural biotechnology. Your support will help us in our mission to feed the world with knowledge. You can help by donating as little as $10.
See more articles:
News from Around the World
- FAO Report Promotes Biotechnology as Key Tool in Facing Climate Change
- African Party State Delegates Converge for COP/MOP 8 Preparatory Workshop
- Kenyan Editors Urged to Rely on National Biosafety Authority for GMO Safety Matters
- Scientists Trace Evolution of Abscisic Acid
- Non-bruising GE Potato Cleared for Sale by USDA
- Meta-analysis in Mexico Confirms There are No Additional Risks in GM Maize Compared with Conventional Maize
- Scientists Find SGR Gene Induces Color Changes in Leaves
- Philippines Research Shows Bt Eggplant Does Not Harm Non-target Insects
- Research Team Develops Technique that Quickly Identifies Chemicals Affecting Plant Growth
- GM Crops Could Soon be Grown in UK After Brexit, Says Ag Minister
- Overexpression of HvPAPhy_a Gene Increases Phytase Activity in Mature Barley Straw and Grains
- TaCAD12 Gene Contributes to Resistance to Sharp Eyespot Disease in Wheat
Plant Breeding Innovations
- Researchers Review Opportunities Presented by CRISPR-Based Tools in Understanding Plant–Pathogen Interactions
- New Gene Editing Technology Cures Blood Disorder in Mice
- ISAAA Infographic: Approved Transgenic Plant Events
Subscribe to CBU: