干旱区研究

干旱区研究

• 中国山地生物多样性 •    下一篇

干旱胁迫环境下的胡杨叶片气孔变化分析

夏振华 1,2 ，陈亚宁2 ，朱成刚2，周莹莹1,2，陈晓林2   

  1. 1.新疆师范大学 地理科学与旅游学院，新疆 乌鲁木齐 830054；2.中国科学院新疆生态与地理研究所/荒漠与绿洲生态国家重点实验室，新疆 乌鲁木齐 830011
  • 发布日期:2019-01-01
  • 基金资助:
    中国科学院科技服务网络计划项目（KFJ-STS-ZDTP-036）资助

Analysis of Stomatal Changes of  Population Euphraticaleaves under Drought Stress Environment

XIA Zhen-hua1,2, CHEN Ya-ning2, ZHU Cheng-gang2，ZHOU ying-ying1,2,CHEN xiao-lin2   

  1. 1. College of geography and tourism, Xinjiang Normal University, Urumqi 830054, China; 2. State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China
  • Published:2019-01-01

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摘要： 研究胡杨叶片气孔特征有助于解读干旱胁迫环境下的水分利用特征和抗旱机理。本文选取塔里木河下游英苏、阿拉干、依干布及麻三个典型断面，以不同性别胡杨为研究对象，探讨不同干旱胁迫梯度下胡杨叶片气孔密度与气孔长度的变化规律，分析雌、雄胡杨在干旱胁迫下的响应差异。结果显示：（1）胡杨叶片气孔密度随干旱胁迫程度的增加呈上升趋势，而叶片气孔长度随干旱胁迫程度的加大呈减小趋势；（2）干旱胁迫环境下，不同性别胡杨叶片的气孔密度和气孔长度的变化率存在一定差异，表现为在干旱胁迫环境下，雄性胡杨的叶片下表皮气孔密度增长率较小，而雌性胡杨叶片的下表皮气孔长度负增长率显著大于雄性的下表皮；（3）胡杨叶片气孔密度和长度的变化反映不同性别胡杨的抗干旱能力，从胡杨叶片的气孔密度与气孔长度的变化结果显示，在干旱胁迫环境下，雄性胡杨的保水能力和耐受能力强于雌株。

关键词: 胡杨, 气孔密度, 气孔长度, 塔里木河下游

Abstract:  The study of stomatal characteristics of Populus euphratica leaves is helpful to understand the characteristics of water use and drought resistance mechanism under drought stress.In this paper, three typical sections of P. euphratica were selected from the lower reaches of Tarim River, Yingsu, Aragan, Yikanbujima. The variation of stomatal density and stomatal length in the leaves of P. euphratica under different drought stress gradients was investigated, and the response difference between female and male P. euphratica under drought stress was analyzed.Result are as follows: (1) The stomatal density of P. euphratica leaves increased with the increase of drought stress, while the leaf stomatal length decreased with the increase of drought stress; (2) Under drought stress, there were some differences in stomatal density and stomatal length between male and female P. euphratica leaves, which showed that the growth rate of stomatal density in leaf epidermis of male P. euphratica was small under drought stress.The stomatal length of lower epidermis of female P. euphratica was significantly higher than that of male; (3) The changes of stomatal density and length of the leaves of P. euphratica reflect the anti-drought ability of different sexes, and the change of stomatal density and stomatal length from the leaves of  P. euphratica siratica showed that the water retention and tolerance ability of the male was stronger than that of the female.

Key words: Populus euphratica, Stomatal density, Stomatal length, The lower reaches of Tarim River