干旱区生态环境知识资源中心(Arid): 盐生植物长叶红砂泌盐特性的研究

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	盐生植物长叶红砂泌盐特性的研究
其他题名	Study on Characters of Ions Secretion from Reaumuria trigyna
	薛焱; 王迎春
ISSN	1000-694X
出版年	2008
卷号	28 期号:3 页码:437-442
中文摘要	长叶红砂(Reaumuria trigyna Maxim.)为东阿拉善-西鄂尔多斯种,属我国特有,是古地中海残遗珍稀植物.通过对长叶红砂野外生存环境、泌盐结构以及泌盐特点的研究,结果显示:长叶红砂是一种具有多细胞盐腺的向外泌盐的泌盐盐生植物;长叶红砂植物体内、盐腺分泌物中盐分离子组分与生存土壤的离子组分一致,均含有Na~+、K~+、Ca~(2+)、Mg~(2+)、SO~(2-)_4和Cl~-等离子,但含量差异较大,其中土壤中阳离子以Na~+或以Na~+和Ca~(2+)为主,阴离子以Cl~-或SO~(2-)_4为主;植物的根、茎、叶中阳离子却以K+为主,且6种离子含量的基本趋势均是:根＜茎＜叶;分泌物中Na+ 、Cl~-的含量最高,其次是SO~(2-)_4;盐腺的分泌速率表现为:上午的分泌量高于下午,白昼高于夜间,这些结果说明盐腺的分泌选择性与其保持植物体内适当的盐分和养分浓度以适应野生生境有关.
英文摘要	Reaumuria trigyna Maxim, a rare remnant derived from the Mediterranean Sea, is peculiarly endemic to Alax-Erdos Desert of China. The structure of salt gland and secretion characteristics of salt excretion from Reaumur.ia trigyna, and their relationship with salt distribution in the soil of field environment were studied.＇ The halophyte Reaumuria trigyna, with salt-gland-ferous multi-cells, can secrete salt. The ion composition in Reaumuria trigyna plant and its secretion is consistent to that in habitat soil, all have ions of Na~＋ , K~＋ , Ca~(2＋) , Mg~(2＋) , SO_4~(2-) and Cl, but different in ion content. Cations as Na~＋ or Na~＋ and Ca~(2＋) , and anions as Cl or SO_4~(2-) are dominant in soil solutions; K~＋ is dominant in the roots, stems and leaves of plant, the contents of the six ions follow the order： roots〈stems〈leaves. In the secretion of Reaumuria trigyna the content of Na~＋ and Cl~- is the highest, followed by SO_4~(2-). The excreting rate of salt gland was higher in the morning than that in the afternoon and higher in daytime than that at night. Such high selectivity of salt gland secreting salt is the self-adjustment mechanism of Reaumuria trigyna to adapt to the wild habitat, maintaining the proper salt and nutrient contents.
中文关键词	长叶红砂 ; 盐腺 ; 盐生植物 ; 盐分分泌
英文关键词	Reaumuria trigyna salt gland halophyte salt excretion
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:3242250
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/223136
作者单位	内蒙古大学生命科学学院, 呼和浩特, 内蒙古 010021, 中国
推荐引用方式 GB/T 7714	薛焱,王迎春. 盐生植物长叶红砂泌盐特性的研究[J],2008,28(3):437-442.
APA	薛焱,&王迎春.(2008).盐生植物长叶红砂泌盐特性的研究.,28(3),437-442.
MLA	薛焱,et al."盐生植物长叶红砂泌盐特性的研究".28.3(2008):437-442.

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