摘要
为了探索冬季大叶女贞叶片丙二醛、可溶性糖含量的变化规律及其与植株抗寒性的关系,以不同树龄、不同抗寒性植株叶片为材料,于2011年11月上旬—2012年3月中旬的每1个节气内分别采样,测定叶片丙二醛及可溶性糖的含量,并在2012年4月初对每个采样树冬季受冻情况进行调查。结果表明:不同树龄及不同抗寒性的植株冬季叶片丙二醛及可溶性糖具有不同的变化曲线,低温胁迫下叶片丙二醛及可溶性糖含量出现上升趋势越早、上升幅度越大的植株,其抗寒性越差。丙二醛、可溶性糖反映出的抗寒性与植株实际的受冻情况基本一致,两者可作为植物抗寒性测定的生理指标。优树的抗寒性与普通树或受冻树的差异,是由于其在低温胁迫下的生理调节能力不同所致,这种生理调节能力和植株的遗传性有关,且随着树龄的增加有增强的趋势。
In order to explore the change rules of MDA and soluble sugar content in leaves of Ligustrunlucidum Ait in winter,with the leaves from the tree of different age,different cold resistance as the study materials,MDA and soluble sugar content of leaves were measured in every solar term from the early November,2011 to the middle of March,2012,and frozen injury of every sampling tree was investigated in the early April,2012.The results showed that：change curves of MDA and soluble sugar content in different samples were different.On low-temperature stress,the earlier MDA and soluble sugar content of leaves presented ascendant trend,or the bigger ascensional range was,the poorer cold-resistance of plants was.Cold-resistance shown by MDA and soluble sugar content change in leaves was basically in conformity with the practical frozen situation of the plants,and could be used as the physiological indexes of plant hardiness determination.On low-temperature stress,the differences of cold hardiness among select trees and common trees or frozen trees were due to the differences in physical adjustment ability which was relevant with plant genetic influence,and prevented strengthen trend along with the increase of tree age.
出处
《中国农学通报》
CSCD
2012年第25期68-72,共5页
Chinese Agricultural Science Bulletin
基金
国家林业公益性行业科研专项"大叶女贞
广玉兰等华北常绿阔叶乔木树种良种选育技术研究"(201004031)
关键词
大叶女贞
冬季
丙二醛
可溶性糖
Ligustrunlucidum Ait
winter
MDA
soluble sugar
