不同海拔珠芽蓼叶片类囊体膜色素含量及光系统功能变化

草业学报 ›› 2011, Vol. 20 ›› Issue (1): 75-81.

不同海拔珠芽蓼叶片类囊体膜色素含量及光系统功能变化

王玉萍¹,何文亮³,程李香¹,叶佳³,李雅博³,安黎哲³,张峰^1,2*

1.甘肃农业大学农学院甘肃省作物遗传改良与种质创新重点实验室,甘肃兰州 730070;
2.甘肃农业大学生命科学技术学院,甘肃兰州 730070;
3.兰州大学生命科学学院,甘肃兰州 730000

出版日期:2011-02-22 发布日期:2011-02-22
通讯作者: E-mail:zhangf@gsau.edu.cn
作者简介:王玉萍(1975-),女,甘肃天水人,副教授,博士。
基金资助:
甘肃省自然科学基金项目(0803RJZA051),国家自然科学基金项目(31060063)和教育部新世纪优秀人才支持计划(MCET-07-0214)资助。

Changes of pigment contents and photosynthetic electron transport activities of thylakoid
membranes of Polygonum viviparum grown at different altitudes

LI Ya-bo³, AN Li-zhe³, ZHANG Feng^1,2

1.College of Agronomy, Gansu Key Laboratory of Crop Genetic & Germplasm Enhancement, Gansu
Agricultural University, Lanzhou 730070, China;
2.College of Life Science and Technology,
Gansu Agricultural University, Lanzhou 730070, China;
3.School of Life Sciences,
Lanzhou University, Lanzhou 730000, China

Online:2011-02-22 Published:2011-02-22

摘要/Abstract

摘要： 以天山3个海拔(2 200,3 400,3 900 m)处生长的珠芽蓼叶片为材料,研究了不同海拔珠芽蓼叶片类囊体膜色素含量、叶绿素荧光参数以及光系统电子传递活性的变化。结果表明,不同海拔珠芽蓼叶绿素总含量Chl(a+b)及叶绿素b(Chl b)含量随海拔升高而降低,而叶绿素a/b (Chl a/b),类胡萝卜素/叶绿素(Car/Chl)以及非光化学淬灭系数(NPQ)随海拔升高而增加。F_v/F_m在3 400 m处较海拔2 200 m处稍有增加,增幅不显著(P>0.05),在海拔3 900 m处最低(P<0.05)。F_v/F₀在海拔2 200和3 400 m处保持稳定,在3 900 m处显著降低(P<0.05)。从海拔2 200到3 900 m,F₇₃₄/F₆₈₆随海拔升高而降低显著(P<0.05)。随海拔升高,PSⅠ、PSⅡ和光合电子传递总链的电子传递活性呈降低趋势。光合总链电子传递活性的降低,主要是由于PSⅠ电子传递活性的下降引起的,尤其是在海拔3 900 m。说明在高海拔,PSⅠ较PSⅡ的光抑制程度更严重,低温强辐射所引起的光合电子传递活性降低的主要原因是PSⅠ的光抑制。

Abstract: The pigment content, chlorophyll fluorescence parameters and photosynthetic electron transport activities of thylakoid membranes were investigated in Polygonum viviparum grown at three different altitudes on the Tianshan Mountains. As altitude increased, the values of Chl (a+b) and Chl b decreased, while the values of Chl a/b, Car/Chl and NPQ increased. F_v/F_m was slightly higher in the leaves at 3 400 m than that at 2 200 m though the difference was not significant, whereas at 3 900 m, it had the lowest values and was significant (P<0.05). F_v/F₀ was stable in leaves at 2 200 and 3 400 m, but at 3 900 m, it became smaller (P<0.05). From 2 200 to 3 900 m, F₇₃₄/F₆₈₆ decreased significantly (P<0.05). The activities of PSⅠ, PSⅡ and the whole chain electron transport activity decreased with an increase in altitude. The decrease in the whole chain of photosynthetic electron transport activity was mainly attributable to the decrease in photosynthetic electron transport activity of PSⅠ, especially at 3 900 m. The study revealed that PSⅠ suffered more servere photoinhibition than PSⅡ at higher altitudes, and the decrease in whole chain electron transport activity of leaves exposed to low temperature and strong irradiation was caused mainly by PSⅠ photoinhibition.

中图分类号:

Q948.1

王玉萍,何文亮,程李香,叶佳,李雅博,安黎哲,张峰. 不同海拔珠芽蓼叶片类囊体膜色素含量及光系统功能变化[J]. 草业学报, 2011, 20(1): 75-81.

LI Ya-bo, AN Li-zhe, ZHANG Feng . Changes of pigment contents and photosynthetic electron transport activities of thylakoid
membranes of Polygonum viviparum grown at different altitudes[J]. Acta Prataculturae Sinica, 2011, 20(1): 75-81.

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