干旱区生态环境知识资源中心(Arid): 盐胁迫对爪哇伪枝藻(Scytonema javanicum)生理生化特性的影响

Arid

	盐胁迫对爪哇伪枝藻(Scytonema javanicum)生理生化特性的影响
其他题名	Effect of Salt Stress on Physiological and Biochemical Characteristics of Scytonema javanicum
	陈兰周; 刘永定; 李敦海
来源期刊	中国沙漠
ISSN	1000-694X
出版年	2003
卷号	23 期号:3 页码:285-288
中文摘要	研究了盐胁迫对荒漠生物结皮中的先锋藻类S.javanicum的生理生化特性的影响。S.javanicum对盐胁迫很敏感，在较低盐浓度时光合作用活性已很低；色素分析表明，盐胁迫对类胡萝L素的吸收值影响较大，对Scytonemin色素则较小。从对数生长期开始，其胞外总糖、胞外聚合物(Extracellular polymeris substance，EPS)和蛋白质浓度增高，并在稳定期和衰亡期达到最大。随盐浓度升高，盐胁迫显著抑制其生长，生物量产量下降，但单位生物量(mug Chl a)胞外聚合物各组份的产量增加，其中蛋白质的含量增加更显著。胞内还原性糖含量随盐浓度升高而升高，并在0．1mol·L^-1时达最大；脯氨酸含量则呈v形变化。盐胁迫下胞外聚合物、胞内蔗糖、水溶性糖和还原性糖的大量积累，改变了胞内外物质浓度，说明糖类通过改变其代谢方式，在渗透调节上起着重要的作用。
英文摘要	Present work studied physiological and biochemical characteristics of Scytonema javanicum, one of the pioneer species that was isolated from algal crusts. The production of extracellular polymeric substances ( EPS) and carbohydrates increased by exponential growth phase and reached maximum in stationary phase. Under salinity, the growth rates were restrained and biomass production was decreased, wherever, the productions of EPS and proteins were increased. In the presence of NaCl concentration, the intracellular deoxidizing sugar, water-soluble sugar and sucrose were increased and reached maximum at 0.1 mol o L-l. The grapes of the proline production have a typical V shape with various salinities. Pigment analysis showed that the absorbance carotenoid had a significant change, whereas Scytonemin pigment changed a little under salt stress. The increase of EPS and the changes of intracellular carbohydrates under salt stress showed that they changed the equilibrium between intra- and extra-cells and played an important role in osmotic regulatory.
中文关键词	盐胁迫 ; 爪哇伪枝藻 ; 荒漠生物 ; 光合作用 ; 色素分析 ; 蛋白质 ; 荒漠藻类 ; 胞外聚合物
英文关键词	desert algae salt stress extracellular polymeric substances(EPS) photosynthetic character
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:1274099
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/204655
作者单位	中国科学院水生生物研究所, 武汉, 湖北 430072, 中国
推荐引用方式 GB/T 7714	陈兰周,刘永定,李敦海. 盐胁迫对爪哇伪枝藻(Scytonema javanicum)生理生化特性的影响[J],2003,23(3):285-288.
APA	陈兰周,刘永定,&李敦海.(2003).盐胁迫对爪哇伪枝藻(Scytonema javanicum)生理生化特性的影响.中国沙漠,23(3),285-288.
MLA	陈兰周,et al."盐胁迫对爪哇伪枝藻(Scytonema javanicum)生理生化特性的影响".中国沙漠 23.3(2003):285-288.