干旱区生态环境知识资源中心(Arid): 盐胁迫对沙拐枣光合生理特性的影响

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	盐胁迫对沙拐枣光合生理特性的影响
其他题名	Photosynthetic Characteristics of Calligonum arborescens in Salt Stress
	王文银 1; 高小刚 1; 牟静 1; 高天鹏 2; 徐当会 1
来源期刊	西北植物学报
ISSN	1000-4025
出版年	2017
卷号	37 期号:9 页码:1805-1812
中文摘要	以采自甘肃民勤一年生的沙拐枣幼苗为试材,对不同NaCl浓度(0、50、100、200、300 mmol·L~(-1))处理下沙拐枣光合生理特性进行分析,并对各生理指标与地上生物量进行灰色关联度分析,以探讨荒漠植物沙拐枣的抗盐机理,为沙拐枣的保护及其恢复荒漠生态系统稳定提供理论依据。结果显示:随着NaCl浓度的升高,沙拐枣同化枝内脯氨酸含量逐渐增大,而其可溶性糖含量逐渐减小;在低浓度NaCl(50 mmol·L~(-1) NaCl)处理下,同化枝光合参数均增加,且净光合速率(P_n)、气孔导度(G_s)、蒸腾速率(T_r)均达到最大值,比对照分别显著增加了33.3%、 68.0%、60.8%;与50 mmol·L~(-1) NaCl相比,处理浓度超过50 mmol·L~(-1) NaCl时,P_n、G_s、T_r均降低;同化枝叶绿素b含量随着NaCl浓度的增加而降低,而叶绿素a和总叶绿素含量均呈先增加后降低的趋势。灰色关联度分析发现,同化枝的T_r、G_s、Ci以及叶绿素b与地上生物量的关联度较大。研究表明,低盐浓度NaCl激活了沙拐枣的某些生理机制,有利于植株的光合作用和生长,而植物在高盐浓度胁迫时能通过调节脯氨酸和可溶性糖的含量,减少叶绿素含量、P_n和T_r等维持自身的生长。
英文摘要	One year seedlings of Calligonum arborescens from Minqin in Gansu province were treated with different concentrations of NaCl(0,50,100,200,300 mmol·L~(-1)).We analyzed the photosynthetic characteristics and made the gray correlation analysis between physiological indexes and aboveground biomass,to explore the salt tolerance mechanism of desert plants,provide a theoretical basis for C.arborescens to better adapt to the virtual environment and to protect and restore the stability and sustainability of desert ecosystems. The results showed that,with the increasing of NaCl concentration,proline content gradually increased, in opposition to the change in soluble sugar.the photosynthetic parameters increased obviously under 50 mmol·L~(-1) NaCl,and the net photosynthetic rate,stomatal conductance and transpiration rate reached the maximum,and significantly increased by 33.3%,68.0%and 60.8%compared with the control, the net photosynthetic rate,stomatal conductance and transpiration rate decreased when the concentration was more than 50 mmol·L~(-1) compared with 50 mmol·L~(-1) NaCl.The content of chlorophyll b decreased with the increasing of NaCl concentration while chlorophyll a and chlorophyll increased first and then decreased.Gray correlation analysis showed that transpiration rate,stomatal conductance,intercellular CO_2 concentration and chlorophyll b were significantly correlated with aboveground biomass.The research showed,low NaCl concentrations improving the growth of plants by activating certain mechanisms of plants.Through the adjustment of proline and soluble sugar contents,reducing chlorophyll content,net photosynthetic rate and transpiration rate,plants could maintain growth under high salt concentration.
中文关键词	沙拐枣 ; 脯氨酸 ; 可溶性糖 ; 叶绿素 ; 灰色关联度分析
英文关键词	Calligonum arborescens proline soluble sugar chlorophyll gray correlation analysis
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:6089307
来源机构	兰州大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/236823
作者单位	1.兰州大学生命科学学院, 草地农业生态系统国家重点实验室, 兰州, 甘肃 730000, 中国; 2.兰州城市学院城市生态与环境生物技术中心, 兰州, 甘肃 730070, 中国
推荐引用方式 GB/T 7714	王文银,高小刚,牟静,等. 盐胁迫对沙拐枣光合生理特性的影响[J]. 兰州大学,2017,37(9):1805-1812.
APA	王文银,高小刚,牟静,高天鹏,&徐当会.(2017).盐胁迫对沙拐枣光合生理特性的影响.西北植物学报,37(9),1805-1812.
MLA	王文银,et al."盐胁迫对沙拐枣光合生理特性的影响".西北植物学报 37.9(2017):1805-1812.