The Responses of Photosynthetic and Chlorophyll Fluorescence to Water Stress in Three Provenances of Calligomum mongolicum

doi:10.7522/j.issn.1000-694X.2013.00432

JOURNAL OF DESERT RESEARCH

2014, Vol. 34

Issue (5): 1301-1306 DOI: 10.7522/j.issn.1000-694X.2013.00432

The Responses of Photosynthetic and Chlorophyll Fluorescence to Water Stress in Three Provenances of Calligomum mongolicum

Chong Peifang, Li Yi, Su Shiping

College of Forestry, Gansu Agricultural University, Lanzhou 730070, China

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Abstract Under different water stress conditions, the changes of photosynthetic and chlorophyll fluorescence characteristics of two years old seedling from three provenances (Wuwei, Zhangye and Jiuquan) of Calligomum mongolicum were determined, and their drought resistances were evaluated with the projection pursuit technique. The results showed that:Water stress decreased the net photosynthetic rate (P_n), stomatal conductance (G_s), transpiration rate (Tr), potential efficiency of primary conversion of light energy of PS (F_v/F_m), actual activities of PSⅡ(Ф_PSⅡ) and the photochemical quenching (qP), but increased the minimal fluorescence (F_o) and non-pho tochemical quenching (qN). The changing ranges were different between the three provenances, especially there existed significant differences (p<0.05) between Zhangye and Jiuquan provenances under severe water stress. The value of P_n, G_s, F_v/F_m, Ф_PSⅡ and qN of the three provenances under severe water stress followed an order of Jiuquan>Wuwei >Zhangye; the value of Tr, F_o and qP followed an order of Zhangye >Wuwei>Jiuquan. The modified projection pursuit method was used to study the selection of more drought resistant provenance for C. mongolicum, results showed that the provenance from Jiuquan was the best in drought resistant, followed by that in the provenance from Wuwei, and the provenance from Zhangye was less than the other provenances.

Key words: drought resistant chlorophyll fluorescence parameters Calligomum mongolicum provenances projection pursuit

Received: 01 July 2013 Published: 20 September 2014

ZTFLH:

Q948.11

Corresponding Authors: 李毅（Email：liyi@gsau.edu.cn） E-mail: liyi@gsau.edu.cn



	Articles by authors
	Chong Peifang
	Li Yi
	Su Shiping

Cite this article:

Chong Peifang, Li Yi, Su Shiping. The Responses of Photosynthetic and Chlorophyll Fluorescence to Water Stress in Three Provenances of Calligomum mongolicum. JOURNAL OF DESERT RESEARCH, 2014, 34(5): 1301-1306.

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http://www.desert.ac.cn/EN/10.7522/j.issn.1000-694X.2013.00432 OR http://www.desert.ac.cn/EN/Y2014/V34/I5/1301

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