干旱区生态环境知识资源中心(Arid): 盐胁迫下荒漠植物柠条和油蒿的离子吸收及分配特征

Arid

	盐胁迫下荒漠植物柠条和油蒿的离子吸收及分配特征
其他题名	Ion absorption and distribution in Caragana korshinskii and Artemisia ordosica seedlings under different NaCl stress
	张继伟; 赵昕; 陈国雄; 李新荣
来源期刊	干旱区资源与环境
ISSN	1003-7578
出版年	2016
卷号	30 期号:3 页码:68-73
中文摘要	柠条(Caragana korshinskii)和油蒿(Artemisia ordosica)是生长在荒漠地区的两种典型的固沙先锋植物。本试验以生长三个月的柠条和油蒿幼苗为研究材料,经0-400 mmol·L~(-1)NaCl溶液胁迫处理7d,检测其含水量变化、主要矿质离子含量变化及其在根茎叶的分布、积累和运输特征。结果表明:随着盐浓度的增加,柠条和油蒿的含水量均呈下降趋势,柠条的变化尤为显著;二者在离子吸收与分配上显著不同,柠条体内Na~+的含量是油蒿的2-3倍,表现为吸钠排钾的特征,而油蒿体内K~+的含量是柠条的2倍左右,具有吸钾拒钠的耐盐特征。此外,随着NaCl浓度增大,柠条体内Cl~-含量升高,K~+、Ca~(2+)、Si~(4+)含量降低,而油蒿体内只有Cl~-含量增加趋势明显,其他离子则相对稳定。说明二者耐盐机制显著不同,在离子吸收与分配上存在互补互利的效应,而且这种互补性提高了他们的耐盐性。
英文摘要	Caragana korshinskii and Artemisia ordosica are two typical sand-fixation pioneer plants adopted in arid and semi-arid regions. In this study we collected three months old of C. korshinskii and A. ordosica seedlings in the laboratory. Then these seedlings were subjected to salt stress by soaked in 0,100,200,300 to 400 mmol·L~(-1) NaCl solutions for 7 d separately. We examined their water contents and main mineral ion contents changes in their roots,stems,and leaves during salt stress. The experiment results indicated that their water content,especially for C. korshinskii,reduced as NaCl concentration increased. The Na~+ content in C korshinskii was 2-3 times of A. ordosica ’s,which indicated that C. korshinskii absorbed Na~+ and inhibited K~+ to adapt to high salt stress as NaCl concentration increased. By on the contrary,A. ordosica absorbed K~+ and inhibited Na~+ because of its K~+ content was twice of C. korshinskii ’s. In addition,the Cl~- content of C. korshinskii increased significantly and the K~+,Ca~(2+),Si~(4+) contents was cut down as NaCl concentration increased in every tissue, but the mineral ions content of A. ordosica were relatively stable. Thus, the two plants mutually benefit from each other and cooperate to promote their resistance to salt stress.
中文关键词	柠条 ; 油蒿 ; 盐胁迫 ; 离子含量
英文关键词	Caragana korshinskii Artemisia ordosica salt stress ion content
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:5655379
来源机构	中国科学院西北生态环境资源研究院
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/234358
作者单位	中国科学院寒区旱区环境与工程研究所, 甘肃省寒区旱区逆境生理生态重点实验室, 兰州, 甘肃 730000, 中国
推荐引用方式 GB/T 7714	张继伟,赵昕,陈国雄,等. 盐胁迫下荒漠植物柠条和油蒿的离子吸收及分配特征[J]. 中国科学院西北生态环境资源研究院,2016,30(3):68-73.
APA	张继伟,赵昕,陈国雄,&李新荣.(2016).盐胁迫下荒漠植物柠条和油蒿的离子吸收及分配特征.干旱区资源与环境,30(3),68-73.
MLA	张继伟,et al."盐胁迫下荒漠植物柠条和油蒿的离子吸收及分配特征".干旱区资源与环境 30.3(2016):68-73.