Karamat Umer, Sun Xiaoxue, Li Na, Zhao Jianjun
State Key Laboratory of North China Crop Improvement and Regulation, Key Laboratory of Vegetable Germplasm Innovation and Utilization of Hebei, Collaborative Innovation Center of Vegetable Industry in Hebei, College of Horticulture, Hebei Agricultural University, 071000, Baoding, China.
Hortic Res. 2021 May 1;8(1):91. doi: 10.1038/s41438-021-00526-x.
Leaf size influences plant development and biomass and is also an important agricultural trait in Brassica crops, in which leaves are the main organ produced for consumption. Leaf size is determined by the coordinated regulation of cell proliferation and cell expansion during leaf development, and these processes are strictly controlled by various integrated signals from the intrinsic regulatory network and the growth environment. Understanding the molecular mechanism of leaf size control is a prerequisite for molecular breeding for crop improvement purposes. Although research on leaf size control is just beginning in Brassica, recent studies have identified several genes and QTLs that are important in leaf size regulation. These genes have been proposed to influence leaf growth through different pathways and mechanisms, including phytohormone biosynthesis and signaling, transcription regulation, small RNAs, and others. In this review, we summarize the current findings regarding the genetic regulators of leaf size in Brassica and discuss future prospects for this research.
叶片大小影响植物的发育和生物量，也是十字花科作物的一个重要农艺性状，在十字花科作物中，叶片是用于食用的主要生产器官。叶片大小由叶片发育过程中细胞增殖和细胞扩张的协同调控决定，这些过程受到来自内在调控网络和生长环境的各种整合信号的严格控制。了解叶片大小控制的分子机制是进行作物改良分子育种的前提条件。尽管在十字花科中关于叶片大小控制的研究才刚刚起步，但最近的研究已经鉴定出了几个在叶片大小调控中起重要作用的基因和数量性状位点（QTL）。这些基因被认为通过不同的途径和机制影响叶片生长，包括植物激素生物合成和信号传导、转录调控、小RNA等。在这篇综述中，我们总结了目前关于十字花科作物叶片大小遗传调控因子的研究结果，并讨论了该研究的未来前景。
