Kohli Pawandeep S, Maurya Kanika, Thakur Jitendra K, Bhosale Rahul, Giri Jitender
National Institute of Plant Genome Research, New Delhi, India.
International Centre of Genetic Engineering and Biotechnology, New Delhi, India.
Plant Cell Environ. 2022 Mar;45(3):677-694. doi: 10.1111/pce.14237. Epub 2021 Dec 13.
Root hairs represent a beneficial agronomic trait to potentially reduce fertilizer and irrigation inputs. Over the past decades, research in the plant model Arabidopsis thaliana has provided insights into root hair development, the underlying genetic framework and the integration of environmental cues within this framework. Recent years have seen a paradigm shift, where studies are now highlighting conservation and diversification of root hair developmental programs in other plant species and the agronomic relevance of root hairs in a wider ecological context. In this review, we specifically discuss the molecular evolution of the RSL (RHD Six-Like) pathway that controls root hair development and growth in land plants. We also discuss how root hairs contribute to plant performance as an active physiological rooting structure by performing resource acquisition, providing anchorage and constructing the rhizosphere with desirable physical, chemical and biological properties. Finally, we outline future research directions that can help achieve the potential of root hairs in developing sustainable agroecosystems.
根毛是一种有益的农艺性状，有可能减少肥料和灌溉投入。在过去几十年里，对植物模式生物拟南芥的研究为根毛发育、潜在的遗传框架以及该框架内环境信号的整合提供了见解。近年来出现了一种范式转变，现在的研究突出了其他植物物种中根毛发育程序的保守性和多样性，以及根毛在更广泛生态背景下的农艺相关性。在这篇综述中，我们具体讨论了控制陆地植物根毛发育和生长的RSL（类RHD六）途径的分子进化。我们还讨论了根毛如何作为一种活跃的生理生根结构，通过进行资源获取、提供锚固作用以及构建具有理想物理、化学和生物学特性的根际环境，对植物性能做出贡献。最后，我们概述了未来的研究方向，这些方向有助于挖掘根毛在发展可持续农业生态系统方面的潜力。
