干旱区生态环境知识资源中心(Arid): 沙漠生物土壤结皮中真藓(Bryum argenteum)和土生对齿藓(Didymodon vinealis)对降雪的生理响应

Arid

	沙漠生物土壤结皮中真藓(Bryum argenteum)和土生对齿藓(Didymodon vinealis)对降雪的生理响应
其他题名	Effects of Snowfall on Physiological Characteristics of Bryum argenteum and Didymodon vinealis Distributed in Biological Soil Crusts
	谢敏 1; 回嵘 1; 刘立超 1; 杨昊天 1; 王艳莉 1; 魏文斐 1; 王雪芹 2
来源期刊	中国沙漠
ISSN	1000-694X
出版年	2017
卷号	37 期号:1 页码:116-123
中文摘要	以腾格里沙漠东南缘人工固沙植被区藓类结皮优势种真藓(Bryum argenteum)和土生对齿藓(Didymodon vinealis)为研究对象,在野外条件下设置4个降雪处理,分别是无降雪(对照)、1/2降雪、1倍降雪、2倍降雪,降雪后测定植株光合色素含量、脯氨酸含量、可溶性糖含量、可溶性蛋白含量以及丙二醛(MDA)含量,研究结皮层2种藓类植物对降雪的生理生态响应及其差异性。结果表明:随降雪量增加,真藓和土生对齿藓光合色素含量和可溶性蛋白含量均升高,且土生对齿藓含量上升趋势更明显;随降雪量增加,2物种脯氨酸含量、可溶性糖含量及丙二醛(MDA)含量均降低,且土生对齿藓可溶性糖含量与MDA含量下降趋势更明显。冬季降雪能够对结皮层藓类植物光合作用和生理活性起到一定促进作用;土生对齿藓对降雪的响应更明显。降雪量增加可能会改变藓类结皮层物种组成和结构,并对维持荒漠生态系统健康产生重要影响。
英文摘要	In this study,Bryum argenteumand 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,watersoluble 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.
中文关键词	降雪 ; 真藓(Bryum argenteum) ; 土生对齿藓(Didymodon vinealis) ; 生理响应 ; 差异
英文关键词	snowfall Bryum argenteum Didymodon vinealis physiological responses difference
语种	中文
国家	中国
收录类别	CSCD
WOS类目	PLANT SCIENCES
WOS研究方向	Plant Sciences
CSCD记录号	CSCD:5963179
来源机构	中国科学院新疆生态与地理研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/237067
作者单位	1.中国科学院西北生态环境资源研究院沙坡头沙漠研究试验站, 兰州, 甘肃 730000, 中国; 2.中国科学院新疆生态与地理研究所, 乌鲁木齐, 新疆 830011, 中国
推荐引用方式 GB/T 7714	谢敏,回嵘,刘立超,等. 沙漠生物土壤结皮中真藓(Bryum argenteum)和土生对齿藓(Didymodon vinealis)对降雪的生理响应[J]. 中国科学院新疆生态与地理研究所,2017,37(1):116-123.
APA	谢敏.,回嵘.,刘立超.,杨昊天.,王艳莉.,...&王雪芹.(2017).沙漠生物土壤结皮中真藓(Bryum argenteum)和土生对齿藓(Didymodon vinealis)对降雪的生理响应.中国沙漠,37(1),116-123.
MLA	谢敏,et al."沙漠生物土壤结皮中真藓(Bryum argenteum)和土生对齿藓(Didymodon vinealis)对降雪的生理响应".中国沙漠 37.1(2017):116-123.