Department of Biotechnology, Guru Nanak Dev University, Amritsar 143005, India.
Plant Cell Rep. 2013 Jun;32(6):741-57. doi: 10.1007/s00299-013-1430-5. Epub 2013 Apr 4.
The demand for increased crop productivity and the predicted challenges related to plant survival under adverse environmental conditions have renewed the interest in research in root biology. Various physiological and genetic studies have provided ample evidence in support of the role of plant growth regulators in root development. The biosynthesis and transport of auxin and its signaling play a crucial role in controlling root growth and development. The univocal role of auxin in root development has established it as a master regulator. Other plant hormones, such as cytokinins, brassinosteroids, ethylene, abscisic acid, gibberellins, jasmonic acid, polyamines and strigolactones interact either synergistically or antagonistically with auxin to trigger cascades of events leading to root morphogenesis and development. In recent years, the availability of biological resources, development of modern tools and experimental approaches have led to the advancement of knowledge in root development. Research in the areas of hormone signal perception, understanding network of events involved in hormone action and the transport of plant hormones has added a new dimension to root biology. The present review highlights some of the important conceptual developments in the interplay of auxin and other plant hormones and associated downstream events affecting root development.
对提高作物生产力的需求以及预测到的植物在不利环境条件下生存的相关挑战，使人们对根生物学的研究重新产生了兴趣。各种生理和遗传研究为植物生长调节剂在根发育中的作用提供了充分的证据支持。生长素的生物合成和运输及其信号转导在控制根生长和发育中起着至关重要的作用。生长素在根发育中的明确作用使其成为主要的调控因子。其他植物激素，如细胞分裂素、油菜素内酯、乙烯、脱落酸、赤霉素、茉莉酸、多胺和独脚金内酯，与生长素相互协同或拮抗作用，引发一系列导致根形态发生和发育的事件。近年来，生物资源的可利用性、现代工具和实验方法的发展，使根发育方面的知识得到了进一步的发展。在激素信号感知、理解激素作用涉及的事件网络以及植物激素的运输等领域的研究，为根生物学增添了新的维度。本综述重点介绍了生长素和其他植物激素相互作用以及影响根发育的相关下游事件的一些重要概念性进展。
