荒漠环境梯度下联生红砂(Reaumuria soongorica)、珍珠(Salsola passerina)荧光特性

doi:10.7522/j.issn.1000-694X.2017.00081

摘要/Abstract

摘要： 高等植物的叶绿素荧光效应是植物为适应环境变化产生的生理响应，任何胁迫对光合作用产生的影响都可通过叶绿素荧光变化表现出来，对衡量各胁迫因子对植物光合特性的影响有重要意义。以荒漠草原区、半荒漠区、典型荒漠区、极端荒漠区4个生境条件下单生、联生红砂（Reaumuria soongorica）和珍珠（Salsola passerina）为材料，对其叶绿素荧光参数以及环境因子进行测定和分析，探讨两种植物在联生条件下对荒漠环境梯度的生理响应机制。结果表明：红砂和珍珠的叶绿素荧光参数各异，在联生条件下，红砂的最大光化学效率（F_v/F_m）、实际光化学效率（Yield）、光化学猝灭系数（qP）值均高于单生，珍珠则相反；随环境胁迫的加剧，各生长方式下红砂和珍珠的F_v/F_m、Yield、qP值均呈现下降趋势，非光化学猝灭系数（qN）呈上升趋势。可见，联生时红砂光合能力增强，对光能有高效的捕捉能力，珍珠则更多的选择以热量的方式散失光能。

关键词: 环境梯度, 种间关系, 叶绿素荧光, 红砂(Reaumuria soongorica), 珍珠(Salsola passerina)

Abstract: The chlorophyll fluorescence effect of higher plants is physiological response to adapt to the environment changes. The impact of any stress on photosynthesis are available through chlorophyll fluorescence changes, which has important significance to measure the effects of stress factors on photosynthetic characteristics of plants. In this paper, single and mixed Reaumuria soongorica and Salsola passerina in 4 different gradient habitats of desert steppe area, semi desert area, typical desert area and extreme desert area as the experimental material, the chlorophyll fluorescence parameters and environmental factors were measured and analyzed to compare the physiological response mechanism of two plants to desert environment gradient under mixed conditions. The results showed that the chlorophyll fluorescence of R. soongorica and S. passerine varied greatly. In the mixed condition, F_v/F_m, Yield and qP value of R. soongorica were higher than that of the single ones, while S. passerina displayed the opposite; with the increase of environmental stress, F_v/F_m, Yield and qP value of R. soongorica and S. passerina in single or mixed condition were decreased, with qN value increased. It indicated that the photosynthetic capacity of R. soongorica was increased when mixed with efficient capture of light energy. However, S. passerina was more selective to the way heat lost light energy.

Key words: environmental gradient, interspecific relationship, chlorophyll fluorescence, Reaumuria soongorica, Salsola passerina

中图分类号:

Q948.12

苏铭, 单立山, 张正中, 王洋, 王珊, 种培芳. 荒漠环境梯度下联生红砂(Reaumuria soongorica)、珍珠(Salsola passerina)荧光特性[J]. 中国沙漠, 2018, 38(6): 1259-1266.

Su Ming, Shan Lishan, Zhag Zhengzhong, Wang Yang, Wang Shan, Chong Peifang. Fluorescence Characteristics of Reaumuria soongorica and Salsola passerina under Desert Environmental Gradient[J]. Journal of Desert Research, 2018, 38(6): 1259-1266.

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