干旱区生态环境知识资源中心(Arid): 盐胁迫对喜钙念珠藻生理活性的影响及钙的胁迫缓解效应

Arid

	盐胁迫对喜钙念珠藻生理活性的影响及钙的胁迫缓解效应
其他题名	Alleviating Effect of Calcium on Salt-stress-induced Inhibition of Photosynthetic Activities in Nostoc calcicola Breb
	魏显珍; 王淑智; 潘响亮
来源期刊	应用与环境生物学报
ISSN	1006-687X
出版年	2013
卷号	19 期号:4 页码:655-662
中文摘要	运用叶绿素荧光技术,结合光合放氧速率、pH等生理活性指标测定,研究了喜钙念珠藻(Nostoc calcicola Breb.)对盐的耐受能力及钙(Ca~(2+))对其所受胁迫的缓解作用.结果显示,喜钙念珠藻在盐度为12的环境中生长状态良好,与之相比在24盐度的处理组中生理活性则显著下降,其光合系统Ⅱ(PSⅡ)的活性和从活性反应中心到初级电子受体阶段的电子传递能力均受到了一定的抑制,但仍然持续生长,说明喜钙念珠藻对盐胁迫有较强的耐受性. 1 mmol/L的Ca~(2+)就能够使光合放氧速率、叶绿素荧光值及光能吸收性能显著恢复.研究结果表明,Ca~(2+)对光合系统和PSⅡ各活性反应中心有着重要的保护作用,并能够提高光能转化为电能及电子传递利用的能力.图8表2参41.
英文摘要	It is important to study the biological responses to salt stress because of the increasing salinity of soil and water in arid lands and its potential harmful effects on ecosystem. The present study aimed to understand the responses of Nostoc calcicola Breb. to salt stress and how calcium could protect it in harsh condition. Fast chlorophyll fluorescence induction dynamics, photosynthesis rate and other indexes of physiological activities were examined. The results showed that salt stress could inhibit activities of photosystem and electron transfer between reaction centers and initial electron transport. The cyanobacterium could grow luxuriously at a salinity of 24, indicating their resistance to salt stress to a certain extent. 1 mmol/L Ca~(2+) was enough to recover the photosynthesis rate, the fluorescence intensity and other performance indexes, and recover the OJIP curves deformed by salt stress to normal feature. Therefore, calcium can protect reaction centers of photosystem Ⅱ (PSⅡ) from damage, and promote conversion of energy and capability of electron transfer. Fig 8, Tab 2, Ref 41.
中文关键词	喜钙念珠藻 ; 盐胁迫 ; 钙 ; 光系统Ⅱ ; 光合作用
英文关键词	Nostoc calcicola Breb. salt stress calcium PSⅡ photosynthesis
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:4933184
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/2XILL650/230426
作者单位	中国科学院新疆生态与地理研究所, 荒漠与绿洲生态国家重点实验室, 乌鲁木齐, 新疆 830011, 中国
推荐引用方式 GB/T 7714	魏显珍,王淑智,潘响亮. 盐胁迫对喜钙念珠藻生理活性的影响及钙的胁迫缓解效应[J]. 中国科学院新疆生态与地理研究所,2013,19(4):655-662.
APA	魏显珍,王淑智,&潘响亮.(2013).盐胁迫对喜钙念珠藻生理活性的影响及钙的胁迫缓解效应.应用与环境生物学报,19(4),655-662.
MLA	魏显珍,et al."盐胁迫对喜钙念珠藻生理活性的影响及钙的胁迫缓解效应".应用与环境生物学报 19.4(2013):655-662.