摘要
【目的】探究盐穗木在盐胁迫下的生理特性变化。【方法】以新疆极端耐盐植物盐穗木为研究材料,测量盐穗木植株在不同NaCl浓度胁迫30 d后相关的生理指标(水势、O2-、SOD、CAT、MDA、电导率、叶绿素含量等)。【结果】盐穗木植株经300 mM盐浓度处理,超氧阴离子(O2-)含量、SOD活性及电导率呈现最低值;丙二醛(MDA)含量在300、500 mM盐胁迫下值较低,叶绿素含量较高,而且盐穗木植株在该浓度范围内生长良好,生物量高。而随着盐浓度增加脯氨酸(Pro)含量增高,水势呈现逐渐降低趋势。【结论】新疆盐生植物盐穗木的生长是需盐的,并具有较高的耐盐能力。
【Objective】The physiological responses of Halostachys caspica under salt stress w ere assayed.【Result】Results showed that the content of O2-and the activity of SOD displayed a lower efficient under 300 mM NaCl stress.The content of MDA and conductivi ty in the 300-500 mM NaCl stress showed a lower value,and the chlorophyll suggested a higher level.And in the range of NaCl concentration,the growth of H.caspica was good with a higher biomass.The Pro content and electrolyte leakage in the a ssimilating shoots of H.caspica gradually increased under NaCl stress,and wat er gradually declined;These results showed that the growth of H.caspica in Xinj iang had a requirement for salt and had a high salt tolerance.【Conclusion】These results cou ld also contribute to the further exploration of this promising species to amend saline soil and improve crop yield and resistance in stressed environments.
出处
《新疆农业科学》
CAS
CSCD
北大核心
2012年第4期716-722,共7页
Xinjiang Agricultural Sciences
基金
新疆维吾尔自治区高校科研计划项目(XJEDU2011102)
新疆生物资源基因工程重点实验室开放课题(XJDX0201-2012-06)
关键词
盐生植物
盐穗木
盐胁迫
生理特性
halophyte
Halostachys caspica
NaCl stress
physiolo gical assay
