Plant steroid hormones offer a path to tougher, drought-hardy crops
Mane RS, Prasad BD, Sahni S, Quaiyum Z, Kanth K
Plant Signaling
The tomatoes and peppers wilting on a hot afternoon are running low on a steroid hormone that, if boosted through breeding, could keep them green and productive through worse droughts and salty soil.
Plants make their own steroid hormones, called brassinosteroids, that act like an internal stress-management system. Scientists have now mapped out how these hormones get made, sensed, and moved around inside the plant, and how that movement helps different parts of the plant respond to heat, drought, or salty soil in their own way. Understanding this could let breeders create crops that shrug off the rougher weather climate change is bringing.
Key Findings
BRI1-BAK1 receptor complex and the BIN2-BES1/BZR1 signaling module remain the core molecular switches controlling brassinosteroid responses
Newly discovered ABCB transporter proteins move brassinosteroids around the plant, enabling tissue-specific, localized stress responses rather than uniform whole-plant signaling
Brassinosteroids improve stress tolerance through multiple coordinated mechanisms: antioxidant defense, photosynthesis efficiency, ion balance, and nutrient uptake
chevron_right Technical Summary
Plant steroid hormones called brassinosteroids help crops cope with heat, drought and salty soil by boosting antioxidant defenses, photosynthesis and nutrient use, and scientists now understand how these hormones get distributed within plants to trigger localized responses.
Abstract Preview
Original paper
Brassinosteroids in plant growth and stress adaptation: molecular mechanisms and physiological functions.
Climate change is intensifying heat, drought and salinity stresses, placing global food production at increasing risk and highlighting the need for stress-resilient crops. Brassinosteroids (BRs), k...
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Climate adaptation in plants refers to the physiological and evolutionary mechanisms through which plants adjust to changing environmental conditions, including temperature shifts, altered precipitation patterns, and seasonal variations. Understanding these processes is essential for plant science
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