The genetic basis of plant shoot branching and the hormonal, metabolic and environmental regulation

doi:10.3969/j.issn.1004-1524.20231066

Acta Agriculturae Zhejiangensis ›› 2024, Vol. 36 ›› Issue (3): 690-703.DOI: 10.3969/j.issn.1004-1524.20231066

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The genetic basis of plant shoot branching and the hormonal, metabolic and environmental regulation

CHEN Shangyu¹(), SONG Xuewei¹, QI Zhenyu², ZHOU Yanhong¹, YU Jingquan¹, XIA Xiaojian¹^,^*()

1. Department of Horticulture,Zhejiang University,Hangzhou 310058,China
2. Agricultural Experiment Station,Zhejiang University,Hangzhou 310058, China

Received:2023-09-05 Online:2024-03-25 Published:2024-04-09

Abstract

Abstract:

Plants have evolved diverse architectures for adapting to the changing environment. Shoot branching is one part of plant architecture, and is closely related to the formation of product organs. On the other hand, changes in the allocation of photosynthates as a result of shoot branching also have large impacts on crop yield and quality. The formation of lateral branch is determined by several stages including the initiation of axillary meristem, the activation of lateral buds, and the sustained growth of lateral buds. These developmental processes are controlled by genetic, hormonal, metabolic and environmental regulation. In this review, we summarized how the initiation of axillary meristem and activation of lateral buds are controlled, including the critical transcription factors and their action modes, the function and signaling pathway of different plant hormones and their interactions, and the mechanisms by which sugar and light signals impinge on the hormonal signaling network to regulate shoot branching. Finally, we prospected the future research on the roles of circadian clock and epigenetic modifications in shoot branching, and the technologies of improving crop architecture by using gene editing and environmental control.

Key words: shoot branching, plant hormone, sugar signaling, light environment, transcription factor

CLC Number:

Q949.4

CHEN Shangyu, SONG Xuewei, QI Zhenyu, ZHOU Yanhong, YU Jingquan, XIA Xiaojian. The genetic basis of plant shoot branching and the hormonal, metabolic and environmental regulation[J]. Acta Agriculturae Zhejiangensis, 2024, 36(3): 690-703.

Figures/Tables 3

References 153

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The genetic basis of plant shoot branching and the hormonal, metabolic and environmental regulation

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