State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, Guangdong Provincial Key Laboratory of Plant Molecular Breeding, South China Agricultural University, Guangzhou 510642, China.
Guangdong Laboratory of Lingnan Modern Agriculture, Guangzhou 510642, China.
Int J Mol Sci. 2020 Jul 17;21(14):5052. doi: 10.3390/ijms21145052.
Leaf angle (LA), defined as the angle between the plant stem and leaf adaxial side of the blade, generally shapes the plant architecture into a loosen or dense structure, and thus influences the light interception and competition between neighboring plants in natural settings, ultimately contributing to the crop yield and productivity. It has been elucidated that brassinosteroid (BR) plays a dominant role in determining LA, and other phytohormones also positively or negatively participate in regulating LA. Accumulating evidences have revealed that these phytohormones interact with each other in modulating various biological processes. However, the comprehensive discussion of how the phytohormones and their interaction involved in shaping LA is relatively lack. Here, we intend to summarize the advances in the LA regulation mediated by the phytohormones and their crosstalk in different plant species, mainly in rice and maize, hopefully providing further insights into the genetic manipulation of LA trait in crop breeding and improvement in regarding to overcoming the challenge from the continuous demands for food under limited arable land area.
叶角（LA），定义为植物茎与叶片的近轴面之间的夹角，通常将植物结构塑造成疏松或密集的结构，从而影响自然环境中邻近植物的光捕获和竞争，最终影响作物产量和生产力。已经阐明，油菜素内酯（BR）在决定 LA 方面起主导作用，其他植物激素也积极或消极地参与调节 LA。越来越多的证据表明，这些植物激素在调节各种生物过程中相互作用。然而，关于植物激素及其相互作用如何参与塑造 LA 的综合讨论相对较少。在这里，我们旨在总结植物激素介导的 LA 调控及其在不同植物物种（主要是水稻和玉米）中的串扰方面的进展，希望为作物育种中 LA 特性的遗传操作以及在有限耕地面积下不断满足粮食需求的挑战方面提供进一步的见解。
