干旱区生态环境知识资源中心(Arid): 干旱区木本植物盐分积累与其耐旱性的关系

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	干旱区木本植物盐分积累与其耐旱性的关系
其他题名	Relationship between the Salt Accumulation and the Drought Resistance in Several Woody Plants in Arid Zone
	柏新富; 朱建军; 王仲礼; 谭永芹; 刘林德
来源期刊	林业科学
ISSN	1001-7488
出版年	2012
卷号	48 期号:7 页码:45-49
中文摘要	通过对干旱区4种木本植物体内Na~+,K~+浓度和水分、光合等指标的测定、比较,分析盐分积累与其耐旱性的关系。结果表明:梭梭和柽柳能够吸收、积累较多的Na~+,而花棒和沙枣组织Na~+浓度相对较低;与花棒和沙枣相比,梭梭和柽柳具有较低的组织水势和渗透势、较小的蒸腾失水量和较大光合作用有效水势范围。表现为植株水势、渗透势和蒸腾失水量与其组织Na~+浓度呈负相关,而光合作用有效水势范围大小则与其呈显著正相关。由此可见:盐分积累能够降低组织渗透势和水势、增强水分吸收的动力,同时还可以减少蒸腾耗水,有利于植株在低水势下维持较高的光合作用能力,即干旱地区的植物通过积盐可以增强其抗旱能力。
英文摘要	The plants in arid zones tend to accumulate more salt because the evaporation is much higher than the rainfall in arid environment,and because the selective uptake of water by plant roots results in the rise of salt concentration in solutions in the rhizosphere. In this study,parameters such as the Na~+ and K~+ concentrations,as well as the water status and photosynthesis were measured and analyzed. The results showed that H. ammodendron and T. ramosissima were able to absorb and accumulate more Na~+ than H. scoparium and E. angustifolia. In accordance,H. scoparium and T. ramosissima also had lower water potentials and osmotic potentials in their tissues,as well as lower transpiration and larger range of water potential for effective photosynthesis than H. scoparium and E. angustifolia. There was a negative correlation between the Na~+ concentration and the water / osmotic potentials of the plants,a negative correlation between the Na~+ concentration and the transpirational water loss; but a positive correlation between the Na + concentration and the range of water potential for effective photosynthesis. It is therefore concluded that the salt accumulation could decrease the osmotic potential and water potential of plant tissues,enhance the driving force of water absorption,and reduce the transpiration of the plants,which was beneficial for the plants to retain a relatively higher photosynthesis,implying that salt accumulation in plants could enhance the drought resistance of the plant species in arid zone.
中文关键词	干旱区 ; 木本植物 ; 盐分积累 ; 水分吸收 ; 耐旱性
英文关键词	arid zone woody plants salt accumulation water absorption drought tolerance
类型	Article
语种	中文
国家	中国
收录类别	CSCD
WOS类目	Forestry
WOS研究方向	Forestry
CSCD记录号	CSCD:4607945
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/228294
作者单位	柏新富, 鲁东大学生命科学学院, 烟台, 山东 264025, 中国.; 朱建军, 鲁东大学生命科学学院, 烟台, 山东 264025, 中国.; 王仲礼, 鲁东大学生命科学学院, 烟台, 山东 264025, 中国.; 谭永芹, 鲁东大学生命科学学院, 烟台, 山东 264025, 中国.; 刘林德, 鲁东大学生命科学学院, 烟台, 山东 264025, 中国.
推荐引用方式 GB/T 7714	柏新富,朱建军,王仲礼,等. 干旱区木本植物盐分积累与其耐旱性的关系[J],2012,48(7):45-49.
APA	柏新富,朱建军,王仲礼,谭永芹,&刘林德.(2012).干旱区木本植物盐分积累与其耐旱性的关系.林业科学,48(7),45-49.
MLA	柏新富,et al."干旱区木本植物盐分积累与其耐旱性的关系".林业科学 48.7(2012):45-49.