Journal article

Blue Light Regulates Secondary Cell Wall Thickening via MYC2/MYC4 Activation of the NST1-Directed Transcriptional Network in Arabidopsis

Qian Zhang, Zhi Xie, Rui Zhang, Peng Xu, Hongtao Liu, Hongquan Yang, Monika S Doblin, Antony Bacic, Laigeng Li



Secondary cell walls (SCWs) are formed in some specific types of plant cells, providing plants with mechanical strength. During plant growth and development, formation of secondary cell walls is regulated by various developmental and environmental signals. The underlying molecular mechanisms are poorly understood. In this study, we analyzed the blue light receptor cryptochrome1 (cry1) mutant of Arabidopsis thaliana for its SCW phenotypes. During inflorescence stem growth, SCW thickening in the vasculature was significantly affected by blue light. cry1 plants displayed a decline of SCW thickening in fiber cells, while CRY1 overexpression led to enhanced SCW formation. Transcriptome analysis i..

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Awarded by National Nature Science Foundation of China

Awarded by Ministry of Science and Technology of China

Awarded by Chinese Academy of Sciences

Funding Acknowledgements

We thank Daoxin Xie (Tsinghua University) for providing myc2 myc4 mutants. We thank Jiechen Wang for providing pAbAi vectors and Y1H-Gold strains; Xiaoyan Gao, Zhiping Zhang, Jiqin Li, Fenglin Qin, and Xu Wang for assistance with transmission electron microscopy; and Wenli Hu for assistance with GC-MS analysis. This work was supported by the National Nature Science Foundation of China (31630014), the Ministry of Science and Technology of China (2016YFD0600104), and the Chinese Academy of Sciences (XDPB0402).