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BBX32 Protein
June 19 , 2025
18 hrs 0 min
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- IISER - Bhopal have found that a single protein helps plants time their first step from darkness into light.
- They have also found that ethylene turns BBX32 on and that light protects the BBX32 from being destroyed.
- The role of BBX32 itself is to keep the hook closed for longer.
- Without extra ethylene, BBX32 mutants behave like normal plants whereas with high ethylene or a sand cover, the hook opens too soon.
- Ethylene partially shields BBX32.
- But once the emerging seedling first senses daylight, COP1 enzyme activity drops, allowing the protein to build up on the concave side of the hook and hold it shut a little longer.
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