Effects of Snowfall on Physiological Characteristics of Bryum argenteum and Didymodon vinealis Distributed in Biological Soil Crusts

doi:10.7522/j.issn.1000-694X.2016.00037

JOURNAL OF DESERT RESEARCH ›› 2017, Vol. 37 ›› Issue (1): 116-123.DOI: 10.7522/j.issn.1000-694X.2016.00037

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Effects of Snowfall on Physiological Characteristics of Bryum argenteum and Didymodon vinealis Distributed in Biological Soil Crusts

Xie Min^1,2, Hui Rong¹, Liu Lichao¹, Yang Haotian¹, Wang Yanli^1,2, Wei Wenfei^1,2, Wang Xueqin³

1. Shapotou Desert Research and Experimental Station, Northwest Institute of Eco-Environment and Rescurces, Chinese Academy of Sciences, Lanzhou 730000, China;
2. University of Chinese Academy of Sciences, Beijing 100049, China;
3. Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China

Received:2016-01-27 Revised:2016-03-14 Online:2017-01-20 Published:2017-01-20

Abstract

Abstract: In this study, Bryum argenteum and Didymodon vinealis crusts were sampled from an artificial vegetation area of southeastern fringe of the Tengger Desert in northwestern China (37°32'-37°26'N,105°02'-104°30'E). Four snowfall treatments were applied: non-snowfall (control, 0S), half of the ambient conditions (0.5S), ambient snow (S), and double ambient conditions (2S). A series of important physiological index were measured after a snowfall event, including photosynthetic pigment content, proline content, water-soluble sugar content, water-soluble protein content and malondialdehyde (MDA) content, to study the effects of snowfall on physiological and ecological characteristics of the two mosses and the differences between them. The results showed that with an increase in snowfall, the content of photosynthetic pigment and water-soluble protein increased, while the content of proline, water-soluble sugar and MDA decreased. Moreover, the change of physiological index following snowfall was greater in D. vinealis than that in B. argenteum. These results suggested that winter snowfall enchanced the photosynthesis and physiological performance of B. argenteum and D. vinealis, and D. vinealis was more sensitive to snowfall than B. argenteum. This study indicated that D. vinealis could be more competitive under increasing snowfall, and the structure and function of BSCs in desert ecosystem will improve, and has theoretical significance in maintaining the health and stability of desert ecosystem.

Key words: snowfall, Bryum argenteum, Didymodon vinealis, physiological responses, difference

CLC Number:

Q945.79

Xie Min, Hui Rong, Liu Lichao, Yang Haotian, Wang Yanli, Wei Wenfei, Wang Xueqin. Effects of Snowfall on Physiological Characteristics of Bryum argenteum and Didymodon vinealis Distributed in Biological Soil Crusts[J]. JOURNAL OF DESERT RESEARCH, 2017, 37(1): 116-123.

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Effects of Snowfall on Physiological Characteristics of Bryum argenteum and Didymodon vinealis Distributed in Biological Soil Crusts

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