农学学报2017，Vol.7Issue(3)：67-72,6.
干旱胁迫对华北落叶松和油松幼苗叶绿素含量与根系活力的影响
Drought Stress on Chlorophyll Content and Root Activity in Seedlings of Larix principis-rupprechtii and Pinus tabuliformis
摘要
Abstract
To study the effect of drought stress on coniferous seedlings,2-year-old seedlings of Larix principisrupprechtii and Pinus tabuliformis were adopted as test materials,and drought stress experiments were conducted using a field simulating method,to analyze the changes of chlorophyll a,chlorophyll b,chlorophyll a+b contents and the value of chlorophyll a/b as well as root activity.Results showed that:(1) the contents of chlorophyll a,chlorophyll b,chlorophyll a+b rose first and then fall under the drought stress in L.principisrupprechtii,but in P.tabuliformis they all decreased,the value of chlorophyll a/b decreased continuously in L.principis-rupprechtii and fluctuated within a small range in P.tabuliformis;(2) the root water content declined continuously and the root activity increased firstly and then decreased in the two tested species under drought stress;(3) the chlorophyll a+b content had a significantly positive correlation with root activity in L.principisrupprechtii,but there was no significant correlation in P.tabuliformis,only an increasing trend of chlorophyll a+b content along with the increase of root activity.In conclusion,the seedling of L.principis-rupprechtii was more sensitive to drought stress than that of P.tabuliformis,and had lower adaptability and drought resistance.关键词
华北落叶松/油松/干旱胁迫/叶绿素/根系活力Key words
Larix principis-rupprechtii/Pinus tabuliformis/Drought Stress/Chlorophyll/Root Activity分类
农业科技引用本文复制引用
陈龙涛,高润梅,石晓东..干旱胁迫对华北落叶松和油松幼苗叶绿素含量与根系活力的影响[J].农学学报,2017,7(3):67-72,6.基金项目
国家自然科学基金“华北落叶松种子萌发与幼苗生长对暖干化气候的响应机制研究”(31400536) （31400536）
山西省回国留学人员科研资助项目“干旱胁迫下外生菌根菌对华北落叶松幼苗生长的影响机制”(2015-062). （2015-062）
