干旱区生态环境知识资源中心(Arid): 生物土壤结皮与种子附属物对4种荒漠植物种子萌发的交互影响

Arid

	生物土壤结皮与种子附属物对4种荒漠植物种子萌发的交互影响
其他题名	Interactive Effects of Biological Soil Crusts and Seed Appendages on Seed Germination of Four Desert Species
	李国栋; 张元明
来源期刊	中国沙漠
ISSN	1000-694X
出版年	2014
卷号	34 期号:3 页码:725-731
中文摘要	生物土壤结皮能直接或间接地影响维管植物种子萌发与群落建成,种子本身的生物学特征(如种子附属物等)对萌发也存在一定影响。本研究选取古尔班通古特沙漠4种常见的具有不同形态附属物的藜科植物(梭梭(Haloxylon ammodendron)、粗枝猪毛菜(Salsola subcrassa)、心叶驼绒藜(Ceratoides ewersmanniana)和角果藜(Ceratocarpus arenarius))种子,设置苔藓结皮、地衣结皮和裸沙3种土壤基质,通过去除或保留种子附属物,对比研究了生物土壤结皮与种子附属物对种子萌发的影响。结果表明:粗枝猪毛菜和梭梭的苞片显著抑制了种子萌发(p<0. 05),心叶驼绒藜的柔毛和角果藜的刺状附属物对种子萌发没有显著影响(p>0.05)。与裸沙相比,苔藓结皮显著抑制了4种植物种子的萌发(p<0. 05),地衣结皮显著抑制了粗枝猪毛菜种子的萌发(p<0. 01),而对其他3种植物种子的萌发无显著影响(p>0.05)。同时,附属物与结皮对粗枝猪毛菜种子的萌发还具有交互作用,表现为显著抑制种子萌发(p<0. 01)。可见,生物土壤结皮对具有不同附属物的荒漠植物种子萌发具有不同的影响,进而造成维管植物种子萌发的空间异质性,影响维管植物分布和多样性。
英文摘要	Biological soil crusts (BSCs) have been found in deserts all over the world and may constitute as high as 70% of the living cover in some plant communities. BSCs can directly or indirectly influence seed germination and establishment of vascular plants, and seeds biological characteristics (such as seed appendages) also play an important role on seed germination. However, the interactive effects of BSCs and seed appendages on seed germination are poorly understand. In this study, our objective was to know more about BSCs-seed appendages interaction on seed germination of dominant vascular plants in the Gurbantunggut Desert of western China. We chose four typical, widely distributed Chenopodiaceous species (Haloxylon ammodendron, Salsola subcrassa, Ceratoides ewersmanniana and Ceratocarpus arenarius) which owned different seed appendages. Seeds belonged to two treatments (appendages were removed and remained) were sown at the surface of three matrices (moss crusts, lichen crusts, bare sand) and their emergence was observed. Final germination results showed that seed’s bracts appendages of H. ammodendron and S. subcrassa significantly inhibited germination rate. Hair appendages of C. ewersmanniana and spine appendages of C. arenarius had no significant effects on seed germination. Moss crusts should be noted because they significantly inhibited seed germination of all species. Although lichen crusts significantly inhibited seed germination of S. subcrassa, they had no obvious effect on the rest three species. Among the four species, the seed germination of S. subcrassa was significantly inhibited due to the BSCs-seeds appendages interaction. Hence, BSCs have different effects on seed germination of desert plants that with different appendages, resulting in the spatial heterogeneity of seed germination of vascular plants, and affect the distribution and diversity of vascular plants.
中文关键词	生物土壤结皮 ; 附属物 ; 种子萌发 ; 荒漠植物 ; 古尔班通古特沙漠
英文关键词	biological soil crust appendage seed germination desert plants Gurbantunggut Desert
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRONOMY
WOS研究方向	Agriculture
CSCD记录号	CSCD:5153908
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/2XILL650/232182
作者单位	中国科学院新疆生态与地理研究所, 中国科学院干旱区生物地理与生物资源重点实验室, 乌鲁木齐, 新疆 830011, 中国
推荐引用方式 GB/T 7714	李国栋,张元明. 生物土壤结皮与种子附属物对4种荒漠植物种子萌发的交互影响[J]. 中国科学院新疆生态与地理研究所,2014,34(3):725-731.
APA	李国栋,&张元明.(2014).生物土壤结皮与种子附属物对4种荒漠植物种子萌发的交互影响.中国沙漠,34(3),725-731.
MLA	李国栋,et al."生物土壤结皮与种子附属物对4种荒漠植物种子萌发的交互影响".中国沙漠 34.3(2014):725-731.