摘要
以邓恩桉嫁接种子园抗寒能力不同且开花的5个家系为材料,测定其越冬期叶片中叶绿素与丙二醛(MDA)含量。结果表明:自然降温过程中,叶绿素含量随着温度的下降而降低,MDA含量随着温度的下降而增加,各家系MDA含量增加幅度不同;春季随着气温的回升,叶绿素含量略有上升,而MDA含量呈下降趋势。通过研究具开花能力的邓恩桉家系越冬期叶绿素与MDA含量动态变化,为选育抗寒能力强的邓恩桉F1代提供理论依据。
Five families of Eucalyptus dunnii that had been selected for flowering competence and a range of cold tolerance in a grafted seed orchard,had their leaves sampled at various times during the course of the winter months to examine their chlorophyll and malondialdehyde(MDA)contents.Chlorophyll contents were found to decrease as temperatures decreased as winter progressed,whilst MDA contents increased,but the increases in MDA differed among the five families.Then,with the onset of spring,chlorophyll contents increased while MDA contents decreased as the temperatures started to rise.This research on the dynamic changes in chlorophyll and MDA contents in the trees of the E.dunnii grafted seed orchard during winter will help provide a theoretical basis for the breeding of this species and production of high quality F1 seeds.
作者
邓紫宇
郭东强
陈健波
刘媛
DENG Ziyu;GUO Dongqiang;CHEN Jianbo;LIU Yuan(Guangxi Forestry Science Research Institute,Nanning 530002,Guangxi,China;Key Laboratory of Central South Fast-growing Timber Cultivation of State Forestry Administration of China,Nanning 530002,Guangxi,China;Guangxi Key Laboratory of Superior Timber Trees Resource Cultivation,Nanning 530002,Guangxi,China)
出处
《桉树科技》
2018年第3期31-35,共5页
Eucalypt Science & Technology
基金
广西科学研究与技术开发项目(桂科1347004-3)
广西林科院基本科研业务费项目(林科201408号)
关键词
邓恩桉
嫁接种子园
叶绿素
丙二醛
自然降温
Eucalyptus dunnii
grafted seed orchard
chlorophyll
MDA
natural temperature decrease
