Smoke and Hormone Mirrors: Action and Evolution of Karrikin and Strigolactone Signaling.

Smoke and Hormone Mirrors: Action and Evolution of Karrikin and Strigolactone Signaling.
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DOI:
10.1016/j.tig.2016.01.002
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发表时间:
2016-03
期刊:
Trends in genetics : TIG
影响因子:
--
通讯作者:
Nelson DC
Nelson DC
中科院分区:
其他
文献类型:
--
作者:
Morffy N;Faure L;Nelson DC

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Karrikins和独脚金内酯是两类对植物生长具有不同影响的丁烯酰亚胺分子。Karrikins存在于烟雾中,独脚金内酯是植物激素,但这两种分子可能通过高度相似的信号传导机制被识别。在这里,我们回顾了karrikin和独脚金内酯的感知和信号转导的最新发现。两种旁系同源的α/β水解酶KAI2和D14分别是karrikin和独脚金内酯受体。D14与F-box蛋白MAX2一起作用,靶向SMXL/D53家族蛋白进行蛋白酶体降解,遗传数据表明KAI2的作用类似。karrikins、独脚金内酯和其他植物激素(包括生长素、茉莉酸和赤霉素)的信号传导机制有着惊人的相似之处。最近的研究表明,在寄生植物中的寄主感知,独脚金内酯识别可以进化KAI2的基因复制。
Karrikins and strigolactones are two classes of butenolide molecules that have diverse effects on plant growth. Karrikins are found in smoke and strigolactones are plant hormones, yet both molecules are likely recognized through highly similar signaling mechanisms. Here we review the most recent discoveries of karrikin and strigolactone perception and signal transduction. Two paralogous α/β hydrolases, KAI2 and D14, are respectively karrikin and strigolactone receptors. D14 acts with an F-box protein, MAX2, to target SMXL/D53 family proteins for proteasomal degradation, and genetic data suggest that KAI2 acts similarly. There are striking parallels in the signaling mechanisms of karrikins, strigolactones, and other plant hormones, including auxins, jasmonates, and gibberellins. Recent investigations of host perception in parasitic plants have demonstrated that strigolactone recognition can evolve following gene duplication of KAI2.
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