Correlation of the corn compensatory growth mechanism after post-drought rewatering with cytokinin induced by root nitrate absorption
Correlation of the corn compensatory growth mechanism after post-drought rewatering with cytokinin induced by root nitrate absorption
复制标题
干旱复水后玉米补偿生长机制与根部硝酸盐吸收诱导细胞分裂素的相关性
DOI：
10.1016/j.agwat.2015.12.007
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发表时间：
2016-03-01
影响因子：
6.7
通讯作者：
Gan, Hong-Bing
中科院分区：
文献类型：
--
作者：
Wang, Xiao-Ling;Wang, Jing-Jing;Gan, Hong-Bing
通过研究几种植物激素的水平和作用，探讨了玉米苗期干旱复水后补偿生长的机理。本研究包括两个处理条件：硝酸盐（NO3-）除了根和细胞分裂素除了叶。结果表明，干旱胁迫降低了植株地上部分和全株生物量，但提高了根系可溶性碳水化合物含量和根系活力。干旱后复水下添加NO3-的根增加玉米生长。复水后10天，复水处理和湿润处理的地上部分和全株生物量值相似。根中加入NO3-后，干旱复水增加了叶片细胞分裂素含量及其从根向叶的传递速率。除了细胞分裂素叶没有另外的NO3-根增加玉米幼苗的生长速度后干旱复水，同时引起高叶片细胞分裂素浓度。因此，在叶片中的根源细胞分裂素浓度的增加是密切相关的补偿生长后，干旱复水在苗期玉米。(C)2015 Elsevier B. V.版权所有。
The mechanism of compensatory growth in corn after post-drought rewatering at the seedling stage was explored by investigating the levels and effects of several plant hormones. This study consisted of two treatment conditions: nitrate (NO3-) addition to the roots and cytokinin addition to the leaves. Results showed that drought stress reduced the biomass of aboveground parts and the whole plant, but increased root soluble carbohydrate concentration and root activity. Post-drought rewatering under the addition of NO3- to the roots increased corn growth. Biomass values of the aboveground parts and the whole plant were similar between the rewatering and wetness at 10 days after rewatering conditions. Upon addition of NO3- to roots, post- drought rewatering increased the cytokinin contents of leaves and its delivery rate from roots to leaves. Addition of cytokinin to leaves without the addition of NO3- to roots increased the growth rate of corn seedlings upon post-drought rewatering and simultaneously caused high leaf cytokinin concentration. Thus, increase in concentration of root-derived cytokinin concentration in leaves was closely related to compensatory growth in corn upon post-drought rewatering at the seedling stage. (C) 2015 Elsevier B.V. All rights reserved.