Cotton's fatty signal molecules act as an internal disease alarm
Liu Z, Sun X
Plant Signaling
The cotton in your t-shirt and bedsheets comes from a crop that loses billions of dollars each year to a fungus that clogs its water-carrying vessels from the inside, so figuring out its natural defense wiring is a direct line to sturdier future harvests.
Plants have a lipid-based messaging system inside their cells, kind of like a chemical relay team, that helps them sense danger and mount a defense. This review pulls together research showing how two key enzymes in cotton produce signaling fats that trigger a cascade of protective responses: closing pores to keep pathogens out, hardening cell walls with lignin, and coordinating with hormones to fight off Verticillium wilt, a fungal disease that chokes the plant's water supply. The researchers also point out ways cotton's defense wiring differs from the well-studied lab plant Arabidopsis, which matters for breeding hardier crops.
Key Findings
Two core enzymes, GhPIP5K9a and GhPLDδ, produce lipid second messengers PI(4,5)P2 and phosphatidic acid that drive cotton's defense response
The signaling network coordinates membrane reorganization, MAPK cascade activation, and crosstalk with calcium and hormone pathways to trigger stomatal closure, lignin deposition, and reactive oxygen species regulation
Cotton shows distinct regulatory nodes compared to Arabidopsis, including unique crosstalk between lipid signaling and specific MAPK modules
chevron_right Technical Summary
Scientists mapped how cotton plants use a fat-based signaling system to detect and fight off Verticillium wilt, a soil fungus that devastates cotton crops worldwide. Understanding this internal alarm system could help breeders develop more resistant cotton varieties.
Abstract Preview
Original paper
Plant Phosphatidylinositol Signalling Network in Cotton Resistance to Verticillium Wilt.
Verticillium wilt, a devastating vascular disease in cotton, threatens global production. This review delineates how the conserved phosphatidylinositol (PI) signalling pathway forms a regulatory ne...
open_in_new Read full abstractAbstract copyright held by the original publisher.
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