应用生态学报2012，Vol.23Issue(11)：3027-3032,6.
亚低温与干旱胁迫对番茄幼苗根系形态及叶片结构的影响
Effects of sub-low temperature and drought stress on root morphology and leaf structure of tomato seedlings
摘要
Abstract
By using WinRhizo 2005a root scanning measurement system and traditional paraffin sectioning method, this paper studied the root morphology and leaf structure of tomato seedlings under effects of sub-low temperature (8-15 ℃) and mild drought stress (55%-70% of normal field capacity ). Single treatment of sub-low temperature or mild drought stress promoted the increase of the seedling root length, surface area, and volume, while the interaction of the sub-low temperature and mild drought stress resulted in the decline of the indices. At sub-low temperature or under mild drought stress, the root length increase was promoted via the increase of the proportion of 0. 50-1.00 mm diameter class roots, and the increase of the root surface area and volume was promoted via the increase of the proportion of 1. 00-2. 00 mm diameter class roots. Under the interaction of the sub-low temperature and mild drought stress, the root growth was inhibited owing to the decrease of the proportions of 0. 20-0. 50 mm and <0. 20 mm diameter classes roots. There was a significant negative correlation between the cell tense ratio ( CTR) and spongy ratio ( SR) , and a significant positive correlation between the CTR and palisade tissue thickness/spongy tissue thickness. At sub-low temperature, the palisade tissue thickness decreased; under mild drought stress, both the palisade tissue thickness and the spongy tissue thickness decreased; whereas the interaction of sub-low temperature and mild drought stress made leaf become thinner and palisade tissue thickness/spongy tissue thickness had a significant decrease.关键词
番茄/根系/亚低温/干旱胁迫/栅栏组织/海绵组织Key words
tomato/ root system/ sub-low temperature/ drought stress/ palisade tissue/ spongy tissue分类
农业科技引用本文复制引用
孙三杰,李建明,宗建伟,姚勇哲,陈凯利..亚低温与干旱胁迫对番茄幼苗根系形态及叶片结构的影响[J].应用生态学报,2012,23(11):3027-3032,6.基金项目
"十二五"国家科技支撑计划项目(2011BAD12B03)资助. （2011BAD12B03）
