Chilling acclimation provides immunity to stress by altering regulatory networks and inducing genes with protective functions in Cassava

文献类型： 外文期刊

第一作者： Zeng, Changying

作者： Zeng, Changying;Chen, Xin;Zhou, Yufei;Bo, Weiping;Song, Shun;Deng, Deli;Guo, Xin;Wang, Bin;Wang, Wenquan;Peng, Ming;Chen, Zheng;Xia, Jing;Zhang, Kevin;Zhou, Junfei;Peng, Hai;Zhang, Weixiong;Chen, Zheng;Xia, Jing;Zhang, Kevin;Zhang, Weixiong;Zhang, Weixiong

作者机构：

关键词： Chilling acclimation;Chilling shock;Gene regulation;Cassava;Castor bean

期刊名称：BMC PLANT BIOLOGY （ 影响因子：4.215； 五年影响因子：4.96 ）

ISSN： 1471-2229

年卷期： 2014 年 14 卷

页码：

收录情况： SCI

摘要： Background: Stress acclimation is an effective mechanism that plants acquired for adaption to dynamic environment. Even though generally considered to be sensitive to low temperature, Cassava, a major tropical crop, can be tolerant to much lower temperature after chilling acclimation. Improvement to chilling resistance could be beneficial to breeding. However, the underlying mechanism and the effects of chilling acclimation on chilling tolerance remain largely unexplored. Results: In order to understand the mechanism of chilling acclimation, we profiled and analyzed the transcriptome and microRNAome of Cassava, using high-throughput deep sequencing, across the normal condition, a moderate chilling stress (14 degrees C), a harsh stress (4 degrees C) after chilling acclimation (14 degrees C), and a chilling shock from 24 degrees C to 4 degrees C. The results revealed that moderate stress and chilling shock triggered comparable degrees of transcriptional perturbation, and more importantly, about two thirds of differentially expressed genes reversed their expression from up-regulation to down-regulation or vice versa in response to hash stress after experiencing moderate stress. In addition, microRNAs played important roles in the process of this massive genetic circuitry rewiring. Furthermore, function analysis revealed that chilling acclimation helped the plant develop immunity to further harsh stress by exclusively inducing genes with function for nutrient reservation therefore providing protection, whereas chilling shock induced genes with function for viral reproduction therefore causing damage. Conclusions: Our study revealed, for the first time, the molecular basis of chilling acclimation, and showed potential regulation role of microRNA in chilling response and acclimation in Euphorbia.

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