The altitudinal effects on photosynthesis of Rosa platyacantha from the Tianshan Mountains in Northwestern China

文献类型： 外文期刊

第一作者： Yang, S. H.

作者： Yang, S. H.;Wei, J. J.;Ge, H.

作者机构：

关键词： photosynthesis;gas exchange;chlorophyll fluorescence;Calvin cycle;antioxidant defense;photodamage

期刊名称：PHOTOSYNTHETICA （ 影响因子：3.189； 五年影响因子：3.38 ）

ISSN：

年卷期：

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收录情况： SCI

摘要： The altitudinal effects on photosynthesis were measured on progenies of three populations of Rosa platyacantha Schrenk from altitudes of 1,170 (L); 1,580 (M); and 1,920 (H) m a. s. l. During the day, net photosynthetic rate (P (N)) decreased in all populations due to the high air temperature in the summer. The H population showed a significantly lower P (N) at noon compared to other populations. The midday depression of P (N) occurred in L and M populations due to stomatal limitations, while P (N) inhibition was associated with PSII activity decline in the H population. In order to avoid photodamage, the plants of H population triggered active antioxidant defenses with a higher enzyme activity and redox ratio of ascorbate at midday compared to the L and M populations. However, more oxidative injury still occurred in the H plants at noon due to higher lipid peroxidation. Our results indicated that the provenance significantly affected photosynthesis in R. platyacantha from northwestern China.

分类号： Q94

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