Sugars Integrate External and Internal Signals in Regulating Shoot Branching.

IF 6.3 1区 生物学 Q1 PLANT SCIENCES
Tianhao Wang, Miao Miao, Jinfeng Zhao, Ashmit Kumar, Xueyong Li
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引用次数: 0

Abstract

Plant phenotypes exhibit high plasticity, with shoot branching as a prime example and a key factor influencing yield in many species. The availability of photosynthates is a critical determinant of shoot branching (or tillering in monocots). Carbohydrates, primarily in the form of sucrose, are synthesised in actively photosynthetic leaves (sources) and transported to non-photosynthetic tissues (sinks), such as tiller buds. Glucose, fructose, sucrose and their intermediates, including trehalose-6-phosphate (Tre6P), function both as energy sources and signalling molecules. Once sucrose is transported from source to sink tissues, it is rapidly hydrolysed into hexoses, which support starch accumulation, and the formation and elongation of tiller buds (outgrowth into a branch or tiller). This review aims to summarise recent discoveries with the focus on (i) sugar synthesis, metabolism, loading and unloading; (ii) sugars as crucial signals in regulating branching; (iii) roles of sugars in mediating the environment-modulated branching; (iv) the interactions between sugars and phytohormonal pathways that influence bud outgrowth and branching. A comprehensive understanding of sugar synthesis, transport, metabolism and signalling in relation to shoot branching will aid in optimising plant architecture and ultimately contribute to enhanced crop yield.

糖整合外部和内部信号调控茎枝分枝。
植物表型具有很高的可塑性,以茎枝分枝为例,是影响许多物种产量的关键因素。光合产物的有效性是茎枝分枝(或单子叶分蘖)的关键决定因素。碳水化合物,主要以蔗糖的形式,在积极进行光合作用的叶子(源)中合成,并运送到非光合作用的组织(汇),如分蘖芽。葡萄糖、果糖、蔗糖及其中间体,包括海藻糖-6-磷酸(Tre6P),既是能量来源,也是信号分子。一旦蔗糖从源组织转运到汇组织,它就会迅速水解成己糖,它支持淀粉的积累,以及分蘖芽的形成和伸长(长成分枝或分蘖)。本文综述了近年来在糖合成、代谢、装载和卸载方面的研究进展;(ii)糖作为调控分支的关键信号;(iii)糖在介导环境调节分支中的作用;糖和影响芽生长和分枝的植物激素通路之间的相互作用。全面了解糖的合成、运输、代谢和与茎部分支相关的信号传导将有助于优化植物结构,最终有助于提高作物产量。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Plant, Cell & Environment
Plant, Cell & Environment 生物-植物科学
CiteScore
13.30
自引率
4.10%
发文量
253
审稿时长
1.8 months
期刊介绍: Plant, Cell & Environment is a premier plant science journal, offering valuable insights into plant responses to their environment. Committed to publishing high-quality theoretical and experimental research, the journal covers a broad spectrum of factors, spanning from molecular to community levels. Researchers exploring various aspects of plant biology, physiology, and ecology contribute to the journal's comprehensive understanding of plant-environment interactions.
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