干旱区生态环境知识资源中心(Arid): 囊果碱蓬离子含量及分布特点

Arid

	囊果碱蓬离子含量及分布特点
其他题名	Ion content and distribution in Suaeda physophora
	李艳红 1; 涂锦娜 1; 张道远 2; 王雷 2; 田长彦 2; 吴国华 3; 张福海 4; 赵振勇 2; 张科 2
来源期刊	干旱区地理
ISSN	1000-6060
出版年	2017
卷号	40 期号:2 页码:365-372
中文摘要	为研究真盐生植物矿质营养特征,以北疆荒漠囊果碱蓬群落为对象,通过土壤及植株调查,分析其矿质元素特征。结果显示:(1)囊果碱蓬的生长增加了0~30 cm土壤的pH值、水分及盐份含量,并使盐分在土层重新分布。(2)根系相对于土壤,具有优先吸收K+、Mg~(2+)养分离子的特点;叶片相对于根系,具有优先运输Cl~-、Na~+、SO_4~(2-)盐分离子的特点,同一离子在吸收和运输的选择不一致,与其在整株的功能相关。(3)Cl~-、Na~+、SO_4~(2-)积累于叶片,含量远大于K~+、Mg~(2+)、Ca~(2+),Cl~-和Na~+可能相伴向上运输,K~+、Ca~(2+)、Mg~(2+)在根、茎、叶保持基本不变的比例。(4)囊果碱蓬属于SO_4-Cl盐积累植物,而背景土壤为Cl~-SO_4型盐土。
英文摘要	Suaeda physophora is a leaf-succulent euhalophytic shrub with tall plant height and high biomass in northern Xinjiang,China. Its content and distribution of mineral elements can reflect the ability of halophytes to absorb soil moisture and mineral nutrients. In this study,soil and plant salinity and mineral nutrients were analyzed in S. physophora communities in a saline desert area in northern Xinjiang. The results were summarized as follows:(1)pH and moisture content in the 0-30 cm root zone soil increased with the growth of S. physophora. Moreover,the content of Na~+,Cl~- and SO_4~(2-) and total salt content in the soil root zone significantly increased(P≤ 0.05),leading to redistribution of soil salinity.(2)The highest ion content was measured in leaves,while a low ion content was detected in roots and stems.(3)The contents of Cl~-,Na~+ and SO_4 ~2 was 11.9%,11.7%,and 3.3%, respectively,which were much higher than those of K~+,Mg~(2+) and Ca~(2+). The distributions of Cl~-,Na~+ and SO_4 ~2 varied greatly among the roots,stems and leaves,while those of K~+,Mg~(2+) and Ca~(2+) were substantially the same. The contents of Cl~- and Na~+ were similar,and they may be concomitant ions. S. physophora was a plant that accumulated SO_4-Cl salt,and the background soil was Cl~-SO_4-dominated saline soil.(4)The roots of S. physophora took preference in selecting K~+ and Mg~(2+) relative to soil;and the leaves took preference in transporting Cl~-,Na~+ and SO_4~(2-) relative to the roots. The selection of ion absorption and transport was inconsistent and affected by the nutritional function of elements. Saline soil affects the nutrition physiology of plants. Investigating the nutritional status of naturally selected halophytes will provide useful reference data for saline agriculture. Ion absorption,distribution, and transportation within S. physophora which is grown in saline-alkali soil,are different from those within glycophytes. Mineral nutrition physiology is greatly influenced by the background soil. Secondary and micro- elements,i.e.,Na,Cl,and S,become not only macro-elements but also hyperaccumulating beneficial elements in S. physophora. The levels of these elements in S. physophora are 2 to 60 000 times than those in crops. These ions are passively or actively enriched in S. physophora,compared with crops. The main damage caused by osmotic stress from soil salinity to crops is physiological drought resulted from cell dehydration. The way for plants to avoid dehydration is to accumulate organic osmotic regulators or inorganic ions. S. physophora mainly relies on absorbing and accumulating large amount of inorganic ions as osmotic regulators from the surroundings, which is the most economical way to osmotic regulation and lowering water potential,and thereby absorbing moisture from the high-salt soil solution. The roots then selectively absorb mineral nutrients based on the absorption of moisture. This is the important mechanism for euhalophytes to survive in saline soil.
中文关键词	囊果碱蓬(Suaeda physophora Pall.) ; 离子含量 ; 选择和吸收 ; 盐分分布 ; 盐生植物
英文关键词	Suaeda physophora ion content select and absorption salt distribution halophyte
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:5964914
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/2XILL650/235926
作者单位	1.克拉玛依区园林绿化管理局, 克拉玛依, 新疆 834000, 中国; 2.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; 3.石嘴山市种子管理站, 石嘴山, 宁夏 753000, 中国; 4.克拉玛依造林减排作业区,新疆油田供水公司, 克拉玛依, 新疆 834000, 中国
推荐引用方式 GB/T 7714	李艳红,涂锦娜,张道远,等. 囊果碱蓬离子含量及分布特点[J]. 中国科学院新疆生态与地理研究所,2017,40(2):365-372.
APA	李艳红.,涂锦娜.,张道远.,王雷.,田长彦.,...&张科.(2017).囊果碱蓬离子含量及分布特点.干旱区地理,40(2),365-372.
MLA	李艳红,et al."囊果碱蓬离子含量及分布特点".干旱区地理 40.2(2017):365-372.