Cryptochrome 1 interacts with PIF4 to regulate high temperature-mediated hypocotyl elongation in response to blue light
Cryptochrome 1 interacts with PIF4 to regulate high temperature-mediated hypocotyl elongation in response to blue light
复制标题
隐花色素 1 与 PIF4 相互作用，调节蓝光响应下高温介导的下胚轴伸长。
DOI：
10.1073/pnas.1511437113
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发表时间：
2016-01-05
影响因子：
11.1
通讯作者：
Liu, Hongtao
中科院分区：
文献类型：
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作者：
Ma, Dingbang;Li, Xu;Liu, Hongtao
隐花色素1（CRY1）是一种蓝光受体，主要介导蓝光对下胚轴伸长的抑制。人们对CRY1影响生长的机制知之甚少。蓝光和温度是对植物生长发育有深远影响的两个关键环境信号，但这两种非生物因素如何整合在很大程度上仍然未知。在此，我们表明蓝光通过CRY1抑制高温介导的下胚轴伸长。此外，CRY1以蓝光依赖的方式直接与光敏色素相互作用因子4（PIF4）相互作用，以抑制PIF4的转录活性。CRY1通过PIF4抑制因温度升高而引起的生长素生物合成。我们的研究结果表明，CRY1通过调节PIF4的活性发出信号，并且多种植物光受体[CRY1和光敏色素B（PHYB）]以及环境温度可以通过相同的信号成分——PIF4介导形态反应。
Cryptochrome 1 (CRY1) is a blue light receptor that mediates primarily blue-light inhibition of hypocotyl elongation. Very little is known of the mechanisms by which CRY1 affects growth. Blue light and temperature are two key environmental signals that profoundly affect plant growth and development, but how these two abiotic factors integrate remains largely unknown. Here, we show that blue light represses high temperature-mediated hypocotyl elongation via CRY1. Furthermore, CRY1 interacts directly with PHYTOCHROME-INTERACTING FACTOR 4 (PIF4) in a blue light-dependent manner to repress the transcription activity of PIF4. CRY1 represses auxin biosynthesis in response to elevated temperature through PIF4. Our results indicate that CRY1 signal by modulating PIF4 activity, and that multiple plant photoreceptors [CRY1 and PHYTOCHROME B (PHYB)] and ambient temperature can mediate morphological responses through the same signaling component-PIF4.