文献类型：期刊文献

中文题名：盐胁迫下沙枣幼苗的生长表现和生理特性

英文题名：Growth and physiological characteristics of Elaeagnus angustifolis L. under salt stress

作者：杨升[1,2] 刘涛[1] 张华新[1,2] 李焕勇[1] 张丽[3]

第一作者：杨升

机构：[1]中国林业科学研究院林业研究所;[2]国家林业局林木培育重点实验室;[3]赤峰市林业科学研究院

年份：2014

卷号：34

期号：1

起止页码：64-70

中文期刊名：福建林学院学报

外文期刊名：Journal of Fujian College of Forestry

收录：CSTPCD;;北大核心:【北大核心2011】；CSCD:【CSCD_E2013_2014】；

基金：国家“十一五”科技支撑计划项目(2009BADB2B0501)

语种：中文

中文关键词：沙枣;盐胁迫;阻隔作用;渗透调节

外文关键词：Elaeagnus angustifolis L. ; salt stress; blocking effect; osmotic regulation

分类号：S718.43

摘要：为了解沙枣幼苗在盐胁迫下的生长和生理变化规律,通过不同浓度NaCl(0,100,200,300,400,500 mmol·L-1)处理2年生沙枣幼苗试验,并测定沙枣在盐胁迫下主要的形态和生理指标。结果显示:(1)随着NaCl浓度的升高,幼苗株高生长量、叶绿素含量、净光合速率、气孔导度和蒸腾速率均呈下降趋势,根冠比和胞间二氧化碳浓度呈上升趋势,而生物量仅在500 mmol·L-1NaCl胁迫下,明显减少。(2)丙二醛、脯氨酸和可溶性糖含量在低NaCl浓度(≤200 mmol·L-1)胁迫下变化不明显,在高NaCl浓度(≥300 mmol·L-1)胁迫下,显著增加,而超氧化物歧化酶活性随着NaCl浓度的升高无明显变化。(3)随着NaCl浓度的升高,植物Na+和Cl-含量逐渐增加,而K+含量逐渐减少;根中Na+和Cl-含量随着NaCl浓度的升高而显著增加,但茎和叶只在500 mmol·L-1NaCl胁迫下才显著增加;K+含量在茎中变化不明显,而根和叶中的K+含量分别在400和500 mmol·L-1NaCl胁迫下显著减少。因此,沙枣能在一定盐胁迫范围内通过根系的阻隔作用和渗透调节适应盐渍环境,并且在400 mmol·L-1土壤盐浓度内,能够比较好地生长。
In order to comprehensive understand the growth and physiological changes of Elaeagnus angustifolis L. under salt stress, seedlings of two-years E. angust~）lis were cultivated in pots and treated with different NaC1 concentrations. Some morphological and physiological indexes were measured. The results showed as follows. （ 1 ） The growth of height, chlorophyll content, net photosyn- thetic rate, stomatal conductance and transpiration rate decreased with increasing NaC1 concentration, but root/shoot ratio and inter- cellular CO2 concentration appeared to be rising. The biomass declined significantly only at 500 mmol. L-1. （2） The MDA, proline and soluble sugar content had insignificant changes at low level of salinity and remarkable increased by high salt stress. Nevertheless, SOD ac.tivity was inapparent as NaC1 concentration increased. （3） Under the salt stress, the Na ＋ and C1- total content of plant increased gradually, while K content decreased with increasing soil salinity. Thought Na ＋ and C1- content of the roots augmented with increasing of NaC1 concentrations, the content of steins and leaves augmented markedly only at 500 mmol-L i. The K ＋ content of the stems did not change statistically, and the content of roots and leaves decreased dramatically at 400 and 500 mmol L-1 , respectively. Hence, E. angu^tifolis can adapt to saline environment by triggering the blocking effect of root and osmotic regulation in a certain range of salt stress, and E. angustifolis can better grow under the 400 retool. L-1 soil salinity.