Role of CBFs as integrators of chloroplast redox, phytochrome and plant hormone signaling during cold acclimation.
Role of CBFs as integrators of chloroplast redox, phytochrome and plant hormone signaling during cold acclimation.
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DOI：
10.3390/ijms140612729
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发表时间：
2013-06-18
影响因子：
5.6
通讯作者：
Hüner NP
中科院分区：
文献类型：
--
作者：
Kurepin LV;Dahal KP;Savitch LV;Singh J;Bode R;Ivanov AG;Hurry V;Hüner NP
冬季谷物和其他冬季耐寒物种的冷适应是增加随后的冻结耐受性的先决条件。低温上调C-重复/脱水响应元件结合转录因子（CBF/DREB1）的表达，从而诱导冷调节（COR）基因的表达。我们总结了证据，表明这些相互作用的整合是导致矮人表型的原因，并增强了与冷仪和过表达CBF的植物相关的光合作用性能。过表达CBF的植物，但在温暖的温度下生长，模仿冷耐腐蚀的矮人，紧凑的表型；提高光合作用的性能；和生物量积累通常与冷化的植物有关。在这篇综述中，我们提出了一个模型，植物通过低温和光强度的变化以及光质量变化来感知冷适应信号。这种整合会导致CBF-Regulon的激活以及随后的COR基因和GA 2-氧化酶（GA2OX）表达的上调，从而导致矮人表型，并增强了耐受性耐受性和增强的光合作用性能。我们得出的结论是，由于植物的光自营养性，植物不依赖单个低温传感器，而是将光强度，光质量和膜粘度的变化整合在一起，以建立冷熟悉的状态。 CBF似乎是这些互连传感/信号通路的主要调节剂。
Cold acclimation of winter cereals and other winter hardy species is a prerequisite to increase subsequent freezing tolerance. Low temperatures upregulate the expression of C-repeat/dehydration-responsive element binding transcription factors (CBF/DREB1) which in turn induce the expression of COLD-REGULATED (COR) genes. We summarize evidence which indicates that the integration of these interactions is responsible for the dwarf phenotype and enhanced photosynthetic performance associated with cold-acclimated and CBF-overexpressing plants. Plants overexpressing CBFs but grown at warm temperatures mimic the cold-tolerant, dwarf, compact phenotype; increased photosynthetic performance; and biomass accumulation typically associated with cold-acclimated plants. In this review, we propose a model whereby the cold acclimation signal is perceived by plants through an integration of low temperature and changes in light intensity, as well as changes in light quality. Such integration leads to the activation of the CBF-regulon and subsequent upregulation of COR gene and GA 2-oxidase (GA2ox) expression which results in a dwarf phenotype coupled with increased freezing tolerance and enhanced photosynthetic performance. We conclude that, due to their photoautotrophic nature, plants do not rely on a single low temperature sensor, but integrate changes in light intensity, light quality, and membrane viscosity in order to establish the cold-acclimated state. CBFs appear to act as master regulators of these interconnecting sensing/signaling pathways.
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影响因子：
11.6
作者：
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