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植物研究 ›› 2005, Vol. 25 ›› Issue (2): 219-225.doi: 10.7525/j.issn.1673-5102.2005.02.024

• 论文 • 上一篇    下一篇

金边卫矛抗寒性研究初探

郭惠红, 李庆, 高述民, 沈应柏, 李凤兰   

  1. 北京林业大学生物科学与技术学院, 北京 100083
  • 收稿日期:2004-11-17 出版日期:2005-06-15 发布日期:2016-06-14
  • 作者简介:郭惠红(1969-),女,讲师,主要从事植物生殖生物学及植物引种驯化研究工作。
  • 基金资助:
    国家林业局"948"国际引进项目(99-04)资助

Preliminary study on cold-resistance of Euonymus radicans ‘Emorald & Gold’

GUO Hui-Hong, LIQ ing, GAO Shu-Min, SHEN Ying-Bai, LI Feng-Lan   

  1. College of Biological Sciences and Technology, Beijing Forestry University, Beijing 100083
  • Received:2004-11-17 Online:2005-06-15 Published:2016-06-14

摘要: 比较观察了金边卫矛在自然越冬及人工冷驯化期间叶片组织结构及胞内淀粉的变化,并测定了未经冷驯化和经冷驯化的金边卫矛幼苗叶片的光响应曲线及两种处理苗在低温胁迫下的光合速率。结果表明:自然越冬及人工冷驯化期间叶片栅栏细胞出现的液泡分割现象以及胞内淀粉在低温驯化前累积、驯化后降解并在脱锻炼后重新积累,均表现出与植物抗寒性发育高度的一致性;与未驯化苗相比,驯化苗叶片的光合速率和光补偿点下降,光饱和点增大。低温胁迫72 h后,驯化苗仍能维持一定的光合作用,而未驯化苗已无光合作用,表明冷驯化提高了幼苗在低温胁迫下光合作用的稳定性。亦对上述适应性变化与抗寒性的关系作了探讨。

关键词: 金边卫矛, 自然越冬, 冷驯化, 适应性, 抗寒性

Abstract: A comparative observation was carried out on the changes of anatomical structure and starch content in the leaves of Euonymus radicans 'Emorald Gold' during overwintering and cold acclimation, and the photosynthesis-light response curves from the leaves of unacclimated and acclimated seedlings as well as the leaf photosynthetic rate of acclimated and unacclimated seedlings treated at the low temperature stress were studied comparatively. The results showed that the appearance of vacuole division during overwintering and cold acclimation were highly correlated to the development of plant cold-resistance. So were the starch accumulation before the acclimation, the starch degradation after the acclimation and starch accumulation again after de-acclimation. Compared with unacclimated seedlings, the leaf photosynthetic rate and photosynthetic light compensation point of acclimated seedlings decreased, photosynthetic light saturation point increased slightly. The leaf photosynthetic rate of acclimated seedlings still maintained at a higher level after low temperature stress for 72 h, but that of unacclimated seedlings became negentropy, indicating that cold acclimation raised the stability of photosynthesis of seedlings under low temperature stress. And the relation between the above-mentioned adaptive changes and plant cold-resistance was also discussed.

Key words: Euonymus radicans ‘Emorald &, Gold’, overwintering, cold acclimation, adaptive, cold-resistance