Control of compound leaf patterning by MULTI-PINNATE LEAF1 (MPL1) in chickpea

Ye Liu, Yuanfan Yang, Ruoruo Wang, Mingli Liu, Xiaomin Ji, Yexin He, Baolin Zhao, Wenju Li, Xiaoyu Mo, Xiaojia Zhang, Zhijia Gu, Bo Pan, Yu Liu, Million Tadege (), Jianghua Chen () and Liangliang He ()
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Ye Liu: University of Science and Technology of China
Yuanfan Yang: Chinese Academy of Sciences
Ruoruo Wang: Chinese Academy of Sciences
Mingli Liu: Chinese Academy of Sciences
Xiaomin Ji: Chinese Academy of Sciences
Yexin He: Chinese Academy of Sciences
Baolin Zhao: Chinese Academy of Sciences
Wenju Li: Chinese Academy of Sciences
Xiaoyu Mo: Chinese Academy of Sciences
Xiaojia Zhang: Chinese Academy of Sciences
Zhijia Gu: Chinese Academy of Sciences
Bo Pan: Chinese Academy of Sciences
Yu Liu: Chinese Academy of Sciences
Million Tadege: Oklahoma State University
Jianghua Chen: University of Science and Technology of China
Liangliang He: Chinese Academy of Sciences

Nature Communications, 2023, vol. 14, issue 1, 1-15

Abstract: Abstract Plant lateral organs are often elaborated through repetitive formation of developmental units, which progress robustly in predetermined patterns along their axes. Leaflets in compound leaves provide an example of such units that are generated sequentially along the longitudinal axis, in species-specific patterns. In this context, we explored the molecular mechanisms underlying an acropetal mode of leaflet initiation in chickpea pinnate compound leaf patterning. By analyzing naturally occurring mutants multi-pinnate leaf1 (mpl1) that develop higher-ordered pinnate leaves with more than forty leaflets, we show that MPL1 encoding a C2H2-zinc finger protein sculpts a morphogenetic gradient along the proximodistal axis of the early leaf primordium, thereby conferring the acropetal leaflet formation. This is achieved by defining the spatiotemporal expression pattern of CaLEAFY, a key regulator of leaflet initiation, and also perhaps by modulating the auxin signaling pathway. Our work provides novel molecular insights into the sequential progression of leaflet formation.

Date: 2023
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DOI: 10.1038/s41467-023-43975-9

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