Plant Cell and Development Biology Lab, Department of Biological Sciences, Indian Institute of Science Education and Research (IISER) Bhopal, Bhopal, India; School of Biological Sciences, Indian Institute of Science Education and Research (IISER) Thiruvananthapuram, India.
Plant Cell and Development Biology Lab, Department of Biological Sciences, Indian Institute of Science Education and Research (IISER) Bhopal, Bhopal, India.
J Photochem Photobiol B. 2019 Feb;191:164-174. doi: 10.1016/j.jphotobiol.2018.12.021. Epub 2018 Dec 28.
Plant development is meticulously modulated by interactions between the surrounding environment and the endogenous phytohormones. Light, as an external signal coordinates with the extensive networks of hormones inside the plant to execute its effects on growth and development. Several proteins in plants have been identified for their crucial roles in mediating light regulated development. Among these are the B-box (BBX) family of transcription factors characterized by the presence of zinc-finger B-box domain in their N-terminal region. In Arabidopsis there are 32 BBX proteins that are divided into five structural groups on the basis of the domains present. Several BBX proteins play important roles in seedling photomorphogenesis, neighbourhood detection and photoperiodic regulation of flowering. There is increasing evidence that besides light signaling BBX proteins also play integral roles in several hormone signaling pathways in plants. Here we attempt to comprehensively integrate the roles of multiple BBX proteins in various light and hormone signaling pathways. We further discuss the role of the BBX proteins in mediating crosstalk between the two signaling pathways to harmonize plant growth and development. Finally, we try to analyse the conservation of BBX genes across species and discuss the role of BBX proteins in regulating economically important traits in crop plants.
植物的发育是由周围环境与内源植物激素之间的相互作用精心调节的。光作为一种外部信号，与植物内部广泛的激素网络协同作用，对生长和发育产生影响。已经鉴定出植物中的几种蛋白质在介导光调控发育中起着关键作用。其中包括 B-box（BBX）家族转录因子，其 N 端区域存在锌指 B-box 结构域。在拟南芥中，有 32 种 BBX 蛋白，根据存在的结构域分为五个结构群。一些 BBX 蛋白在幼苗光形态建成、邻域检测和光周期开花调控中发挥重要作用。越来越多的证据表明，除了光信号，BBX 蛋白还在植物的几种激素信号通路中发挥着不可或缺的作用。在这里，我们试图全面整合多个 BBX 蛋白在各种光和激素信号通路中的作用。我们进一步讨论了 BBX 蛋白在协调植物生长和发育的两个信号通路之间的串扰中的作用。最后，我们尝试分析 BBX 基因在不同物种中的保守性，并讨论 BBX 蛋白在调节作物中经济重要性状中的作用。
