Maintained root length density contributes to the waterlogging tolerance in common wheat (Triticum aestivum L.)
Maintained root length density contributes to the waterlogging tolerance in common wheat (Triticum aestivum L.)
复制标题
DOI：
10.1016/j.fcr.2013.03.020
复制
发表时间：
2013-10-01
影响因子：
5.8
通讯作者：
Yamauchi, Akira
中科院分区：
文献类型：
--
作者：
Hayashi, Tomohito;Yoshida, Tomofumi;Yamauchi, Akira
涝渍胁迫严重影响普通小麦的生长和产量。由于根系中氧气的可用性降低而导致的根系发育受限是植物在淹水条件下的主要生长限制因素。在这项研究中，我们已经确定是否维持根长密度可以是耐涝性的重要性状之一，以维持地上部生长和籽粒产量，利用耐涝和敏感小麦品种。本研究在2006 - 2010年连续5个种植季进行，小麦植株从拔节期到成熟期暴露于淹水。耐涝品种Nishikazekomugi和Iwainodaichi在淹水条件下的相对籽粒产量和整粒率高于感涝品种UNICULM。耐涝品种在淹水条件下保持较高的叶水势、气孔导度和光合速率，这与耐涝品种较高的相对根长密度相一致。这些结果表明，维持根长密度与维持水分吸收和由此产生的光合作用和产量生产在淹水条件下生长的普通小麦。(C)2013爱思唯尔有限公司版权所有。
Waterlogging stress substantially reduces the growth and yield of common wheat (Triticum aestivum L). Limited root development due to decreased availability of oxygen in roots is the major growth-limiting factor for plants under waterlogged conditions. In this study, we have determined whether a maintained root length density can be one of the important traits for waterlogging tolerance to maintain the shoot growth and grain yield, using waterlogging-tolerant and -susceptible wheat cultivars. This study was carried out over five consecutive cropping seasons (from 2006 to 2010), and the wheat plants were exposed to waterlogging from jointing stage to maturity. The waterlogging-tolerant cultivars Nishikazekomugi and Iwainodaichi showed higher relative grain yield and whole grain ratio under waterlogged conditions than the susceptible UNICULM. The waterlogging-tolerant cultivars maintained higher leaf water potential, stomatal conductance and photosynthetic rate under waterlogged conditions than the susceptible one, which was consistent with the higher relative root length density in the tolerant cultivars. These results indicate that maintained root length density is related to maintaining water uptake and the resultant photosynthesis and yield production in common wheat grown under waterlogged conditions. (C) 2013 Elsevier B.V. All rights reserved.