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, Lu Zhang College of Agriculture and Biotechnology, Zhejiang University , Hangzhou 310058, Zhejiang , China Search for other works by this author on: Oxford Academic Lu Wang College of Agriculture and Biotechnology, Zhejiang University , Hangzhou 310058, Zhejiang , China Search for other works by this author on: Oxford Academic Yongchen Fang College of Agriculture and Biotechnology, Zhejiang University , Hangzhou 310058, Zhejiang , China Search for other works by this author on: Oxford Academic Yuhao Gao College of Agriculture and Biotechnology, Zhejiang University , Hangzhou 310058, Zhejiang , China Search for other works by this author on: Oxford Academic Shulin Yang College of Agriculture and Biotechnology, Zhejiang University , Hangzhou 310058, Zhejiang , China Search for other works by this author on: Oxford Academic Jun Su Institute of Horticulture, Yunnan Academy of Agricultural Sciences , Kunming 650205 , China Search for other works by this author on: Oxford Academic Junbei Ni College of Agriculture and Biotechnology, Zhejiang University , Hangzhou 310058, Zhejiang , China Search for other works by this author on: Oxford Academic Yuanwen Teng College of Agriculture and Biotechnology, Zhejiang University , Hangzhou 310058, Zhejiang , China Hainan Institute of Zhejiang University , Sanya, Hainan 572000 , China Search for other works by this author on: Oxford Academic Songling Bai College of Agriculture and Biotechnology, Zhejiang University , Hangzhou 310058, Zhejiang , China Corresponding author: Songling Bai (songlingbai@zju.edu.cn) Search for other works by this author on: Oxford Academic
The Plant Cell, koae167, https://doi.org/10.1093/plcell/koae167
Published:
06 June 2024
Article history
Received:
22 December 2023
Revision received:
15 May 2024
Accepted:
18 May 2024
Published:
06 June 2024
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Lu Zhang, Lu Wang, Yongchen Fang, Yuhao Gao, Shulin Yang, Jun Su, Junbei Ni, Yuanwen Teng, Songling Bai, Phosphorylated transcription factor PuHB40 mediates ROS-dependent anthocyanin biosynthesis in pear exposed to high light, The Plant Cell, 2024;, koae167, https://doi.org/10.1093/plcell/koae167
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Abstract
Plants are increasingly vulnerable to environmental stresses because of global warming and climate change. Stress-induced reactive oxygen species (ROS) accumulation results in plant cell damage and even cell death. Anthocyanins are important antioxidants that scavenge ROS to maintain ROS homeostasis. However, the mechanism underlying ROS-induced anthocyanin accumulation is unclear. In this study, we determined that the HD-Zip I family member transcription factor PuHB40 mediates ROS-dependent anthocyanin biosynthesis under high-light stress in pear (Pyrus ussuriensis). Specifically, PuHB40 induces the PuMYB123-like–PubHLH3 transcription factor complex for anthocyanin biosynthesis. PuHB40-mediated transcriptional activation depends on its phosphorylation level, which is regulated by protein phosphatase PP2A. Elevated ROS content maintains high PuHB40 phosphorylation levels, while also enhancing PuHB40-induced PuMYB123-like transcription by decreasing PuPP2AA2 expression, ultimately leading to increased anthocyanin biosynthesis. Our study reveals a pathway regulating ROS-induced anthocyanin biosynthesis in pear, further clarifying the mechanism underlying abiotic stress-induced anthocyanin biosynthesis, which may have implications for improving plant stress tolerance.
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© The Author(s) 2024. Published by Oxford University Press on behalf of American Society of Plant Biologists. All rights reserved. For commercial re-use, please contact reprints@oup.com for reprints and translation rights for reprints. All other permissions can be obtained through our RightsLink service via the Permissions link on the article page on our site—for further information please contact journals.permissions@oup.com.
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