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, Shuang Liu MOA Key Laboratory of Crop Ecophysiology and Farming System in the Middle Reaches of the Yangtze River, College of Plant Science and Technology, Huazhong Agricultural University , Wuhan 430070 , China Search for other works by this author on: Oxford Academic Yuying Zheng MOA Key Laboratory of Crop Ecophysiology and Farming System in the Middle Reaches of the Yangtze River, College of Plant Science and Technology, Huazhong Agricultural University , Wuhan 430070 , China Search for other works by this author on: Oxford Academic Liyan Zhao MOA Key Laboratory of Crop Ecophysiology and Farming System in the Middle Reaches of the Yangtze River, College of Plant Science and Technology, Huazhong Agricultural University , Wuhan 430070 , China Search for other works by this author on: Oxford Academic Mihray Gulam MOA Key Laboratory of Crop Ecophysiology and Farming System in the Middle Reaches of the Yangtze River, College of Plant Science and Technology, Huazhong Agricultural University , Wuhan 430070 , China Search for other works by this author on: Oxford Academic Aman Ullah MOA Key Laboratory of Crop Ecophysiology and Farming System in the Middle Reaches of the Yangtze River, College of Plant Science and Technology, Huazhong Agricultural University , Wuhan 430070 , China Search for other works by this author on: Oxford Academic Guosheng Xie MOA Key Laboratory of Crop Ecophysiology and Farming System in the Middle Reaches of the Yangtze River, College of Plant Science and Technology, Huazhong Agricultural University , Wuhan 430070 , China Author for correspondence: xiegsh@mail.hzau.edu.cn Search for other works by this author on: Oxford Academic
https://orcid.org/0009-0004-9259-1414 Plant Physiology, Volume 195, Issue 2, June 2024, Pages 1660–1680, https://doi.org/10.1093/plphys/kiae130
Published:
06 March 2024
Article history
Received:
29 November 2023
Accepted:
21 December 2023
Published:
06 March 2024
Corrected and typeset:
21 March 2024
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Shuang Liu, Yuying Zheng, Liyan Zhao, Mihray Gulam, Aman Ullah, Guosheng Xie, CALMODULIN-LIKE16 and PIN-LIKES7a cooperatively regulate rice seedling primary root elongation under chilling, Plant Physiology, Volume 195, Issue 2, June 2024, Pages 1660–1680, https://doi.org/10.1093/plphys/kiae130
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Abstract
Low-temperature sensitivity at the germination stage is a challenge for direct seeding of rice in Asian countries. How Ca2+ and auxin (IAA) signaling regulate primary root growth under chilling remains unexplored. Here, we showed that OsCML16 interacted specifically with OsPILS7a to improve primary root elongation of early rice seedlings under chilling. OsCML16, a subgroup 6c member of the OsCML family, interacted with multiple cytosolic loop regions of OsPILS7a in a Ca2+-dependent manner. OsPILS7a localized to the endoplasmic reticulum membranes and functioned as an auxin efflux carrier in a yeast growth assay. Transgenics showed that presence of OsCML16 enhanced primary root elongation under chilling, whereas the ospils7a knockout mutant lines showed the opposite phenotype. Moreover, under chilling conditions, OsCML16 and OsPILS7a-mediated Ca2+ and IAA signaling and regulated the transcription of IAA signaling-associated genes (OsIAA11, OsIAA23, and OsARF16) and cell division marker genes (OsRAN1, OsRAN2, and OsLTG1) in primary roots. These results show that OsCML16 and OsPILS7a cooperatively regulate primary root elongation of early rice seedlings under chilling. These findings enhance our understanding of the crosstalk between Ca2+ and IAA signaling and reveal insights into the mechanisms underlying cold-stress response during rice germination.
© 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.
This article is published and distributed under the terms of the Oxford University Press, Standard Journals Publication Model (https://academic.oup.com/pages/standard-publication-reuse-rights)
Issue Section:
Research article > CELL BIOLOGY
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