Department of Plant Biotechnology and Bioinformatics, Ghent University, 9052 Ghent, Belgium; Center for Plant Systems Biology, VIB, 9052 Ghent, Belgium.
Department of Plant Biotechnology and Bioinformatics, Ghent University, 9052 Ghent, Belgium; Center for Plant Systems Biology, VIB, 9052 Ghent, Belgium.
Trends Plant Sci. 2018 Apr;23(4):285-292. doi: 10.1016/j.tplants.2018.01.005. Epub 2018 Feb 17.
The movement and differential distribution of endogenous plant hormones are the determining factors for many developmental processes. Brassinosteroids (BRs) are a group of plant steroidal hormones that promote growth and development. Although synthesis and signalling of BRs are well described and characterized, the exit mechanism of these compounds from the cell remains uncharacterizd. Whether BRs are able to move within the apoplast and whether the BR synthesis in one cell can trigger the signalling in its neighbours is also unknown. Here, we draw the attention to these aspects of the BR biology, propose several BR cell export routes and discuss possible consequences of local BR hormonal gradients, resulting from localized biosynthesis and a short-distance transport, for plant development.
内源性植物激素的运动和差异分布是许多发育过程的决定因素。油菜素内酯（BRs）是一类促进生长和发育的植物甾体激素。尽管 BRs 的合成和信号转导已经得到很好的描述和表征，但这些化合物从细胞中输出的机制仍未被描述。BRs 是否能够在质外体中移动，以及一个细胞中的 BR 合成是否能够触发其邻近细胞的信号转导，目前尚不清楚。在这里，我们提请注意 BR 生物学的这些方面，提出了几种 BR 细胞输出途径，并讨论了局部生物合成和短距离运输导致的局部 BR 激素梯度对植物发育的可能影响。
