干旱区生态环境知识资源中心(Arid): 土壤水分胁迫对红砂幼苗生长和渗透调节物质的影响

Arid

	土壤水分胁迫对红砂幼苗生长和渗透调节物质的影响
其他题名	Effects of Dehydration Stress on Growth of Reaumuria Soongorica Seedlings and Regulation of Osmotic Substances
	单立山; 李毅; 石万里; 杨彩红
来源期刊	水土保持通报
ISSN	1000-288X
出版年	2015
卷号	35 期号:6 页码:106-109
中文摘要	[目的]探讨干旱与半干旱区受损红砂种群幼苗适宜生长的土壤水分条件,为红砂植被保护、恢复、重建提供理论依据。 [方法]采用盆栽试验研究不同土壤水分条件下红砂幼苗生长及渗透调节物质差异。 [结果]随土壤水分胁迫程度的加剧,红砂幼苗茎叶总生物量呈明显的减少趋势,其株高呈逐渐降低的变化趋势,而根冠比、根长和根表面积均呈逐步增大的变化趋势,根系生物量呈先增加后减少的变化趋势。随土壤水分胁迫程度的加剧,红砂幼苗茎叶、根组织中脯氨酸含量均表现出明显的增加趋势,而可溶性糖和可溶性蛋白含量的变化相对不明显。 [结论]土壤水分胁迫下红砂幼苗可通过调整自身生长和生物量分配来加大根冠比以及通过积累脯氨酸来适应干旱胁迫,维持植株正常生长。
英文摘要	We aimed to sort out condition of soil moisture which is fitted for the growth of Reaumuria soongorica seedlings in arid or semi-arid area, and further provide a support for the preservation and reestablishment of Reaumuria soongorica population, and for the restoration of its community. [Methods] Pot experiment was carried out to study the effects of soil water limited stress on the growth of Reaumuria soongorica seedlings and the regulation of osmotic substances. [Results] Stem and leaf biomasses of Reaumuria soongorica seedlings were significantly decreased with the increasing of soil water limited stress, and seedling height also decreased gradually. Whereas, root-shoot ratio, root length and root surface area gradually increased. Root biomass experienced a decrease at light stress, and began to increase at server stress. Proline contents of stem-leaf and root in Reaumuria soongorica seedlings significantly increased with the increasing of soil water stress. However, changes of soluble sugar and protein contents in Reaumuria soongorica seedlings were not obvious. [Conclusion] Reaumuria soongorica seedlings have its adaption ways to drought through employing seedling growth adjustment, biomass reallocation, increase of root-shoot ratio, and accumulation of proline.
中文关键词	红砂 ; 土壤水分胁迫 ; 根冠比 ; 脯氨酸 ; 可溶性糖 ; 可溶性蛋白
英文关键词	Reaumuria soongorica soil water stress root/shoot ratio proline soluble sugar soluble protein
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:5602007
来源机构	甘肃农业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/233335
作者单位	甘肃农业大学林学院, 兰州, 甘肃 730070, 中国
推荐引用方式 GB/T 7714	单立山,李毅,石万里,等. 土壤水分胁迫对红砂幼苗生长和渗透调节物质的影响[J]. 甘肃农业大学,2015,35(6):106-109.
APA	单立山,李毅,石万里,&杨彩红.(2015).土壤水分胁迫对红砂幼苗生长和渗透调节物质的影响.水土保持通报,35(6),106-109.
MLA	单立山,et al."土壤水分胁迫对红砂幼苗生长和渗透调节物质的影响".水土保持通报 35.6(2015):106-109.