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植物激素调控跃变型果实成熟

Gene regulation in climacteric fruit ripening.

机构信息

Institute of Molecular and Cellular Biology of Plants, Consejo Superior de Investigaciones Científicas, Universitat Politècnica de València, 46022, Valencia, Spain.

出版信息

Curr Opin Plant Biol. 2021 Oct;63:102042. doi: 10.1016/j.pbi.2021.102042. Epub 2021 May 7.

Abstract

Seed dispersion and consequent plant propagation depend on the success of fruit ripening. Thus, ripening is a highly regulated developmental process aiming to maximize fruit organoleptic traits to attract herbivores. During ripening, the developing fruit experiences dramatic modifications, including color change, flavor improvement, and loss of firmness that are remarkably coordinated. Dynamic interactions between multiple hormones, transcription factors, and epigenetic modifications establish the complex regulatory network that controls the expression levels of ripening-related genes. Tomato, as a climacteric fruit, displays a burst of respiration once the seeds mature, followed by an increase in ethylene that regulates ripening. The accepted paradigm of the ripening transcriptional regulation has been recently challenged by the generation of true-null mutants of the previously considered master regulators of ripening. In addition to hormonal and transcriptional control, epigenetic shifts regulate the ripening process. Future research will contribute to better understanding the factors regulating fruit ripening.

摘要

种子传播和随后的植物繁殖依赖于果实成熟的成功。因此,成熟是一个高度调控的发育过程,旨在最大限度地提高果实的感官特性,以吸引食草动物。在成熟过程中,发育中的果实经历了显著的变化,包括颜色变化、风味改善和硬度丧失,这些变化都得到了很好的协调。多种激素、转录因子和表观遗传修饰之间的动态相互作用建立了复杂的调控网络,控制着与成熟相关基因的表达水平。番茄作为一种呼吸跃变型果实,一旦种子成熟,就会爆发出呼吸作用,随后乙烯的增加会调节成熟。成熟转录调控的公认模式最近受到了挑战,因为之前被认为是成熟主调控因子的真正缺失突变体的产生。除了激素和转录控制外,表观遗传变化也调节成熟过程。未来的研究将有助于更好地理解调节果实成熟的因素。

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