Gandullo Jacinto, Ahmad Safarina, Darwish Essam, Karlova Rumyana, Testerink Christa
Section of Plant Physiology and Plant Cell Biology, Swammerdam Institute for Life Science, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, Netherlands.
Departamento de Biología Vegetal y Ecología, Área de Fisiología Vegetal, Facultad de Biología, Universidad de Sevilla, Seville, Spain.
Plant Phenomics. 2021 Jan 20;2021:2760532. doi: 10.34133/2021/2760532. eCollection 2021.
Plants have developed multiple strategies to respond to salt stress. In order to identify new traits related to salt tolerance, with potential breeding application, the research focus has recently been shifted to include root system architecture (RSA) and root plasticity. Using a simple but effective root phenotyping system containing soil (rhizotrons), RSA of several tomato cultivars and their response to salinity was investigated. We observed a high level of root plasticity of tomato seedlings under salt stress. The general root architecture was substantially modified in response to salt, especially with respect to position of the lateral roots in the soil. At the soil surface, where salt accumulates, lateral root emergence was most strongly inhibited. Within the set of tomato cultivars, H1015 was the most tolerant to salinity in both developmental stages studied. A significant correlation between several root traits and aboveground growth parameters was observed, highlighting a possible role for regulation of both ion content and root architecture in salt stress resilience.
植物已经发展出多种应对盐胁迫的策略。为了识别与耐盐性相关的新性状，并将其应用于潜在的育种中，最近研究重点已转向包括根系结构（RSA）和根可塑性。使用一个包含土壤（根箱）的简单但有效的根系表型分析系统，研究了几个番茄品种的RSA及其对盐度的响应。我们观察到盐胁迫下番茄幼苗具有高度的根可塑性。响应盐分，总体根系结构发生了显著改变，特别是侧根在土壤中的位置。在盐分积累的土壤表面，侧根的出现受到的抑制最为强烈。在所研究的番茄品种中，H1015在两个发育阶段对盐度的耐受性最强。观察到几个根系性状与地上部生长参数之间存在显著相关性，突出了离子含量和根系结构调节在盐胁迫恢复力中的可能作用。
