期刊
CURRENT OPINION IN PLANT BIOLOGY
卷 16, 期 5, 页码 667-673出版社
CURRENT BIOLOGY LTD
DOI: 10.1016/j.pbi.2013.07.005
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资金
- Australian Research Council [LP0882775, DP1096717, FT110100304]
- Australian Research Council [LP0882775, DP1096717, FT110100304] Funding Source: Australian Research Council
Karrikins are butenolides in smoke and char that stimulate seed germination. Karrikin action in Arabidopsis requires the F-box protein MAX2 and the alpha/beta-hydrolase KAI2, a paralogue of D14 that is required for perception of strigolactones (SL). SL response involves hydrolysis by D14, whereas karrikins bind to KAI2 without apparent hydrolysis. We discuss the current understanding of the mechanisms of karrikin perception and response. The usual function of KAI2 is unclear, but we hypothesise that the similarity between karrikins and the endogenous ligand for KAI2 made adaptation of some plants to karrikins possible.
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