摘要
以德农一号茴香为试验材料,研究了不同土壤含盐量对茴香叶片叶绿素含量、质膜相对透性、丙二醛(MDA)、脯氨酸及可溶性糖含量变化的影响。结果表明,叶片叶绿素含量随土壤含盐量增加呈先升高后降低的趋势;叶片脯氨酸含量在土壤含盐量较低时无显著变化,当土壤含盐量达到6mg/g时,其含量明显增加,较对照增加27.9%;当土壤盐含量达到6mg/g后,细胞膜受伤害度明显增加;与对照相比,低盐处理(2mg/g、4mg/g)可降低MDA在茴香组织体内的积累,而高盐处理(6mg/g、8mg/g、10mg/g)可提高MDA在茴香组织体内的积累,其中10mg/g处理的MDA含量最高,为32.0μmol/g;可溶性糖变化趋势和MDA变化相反。可见,低盐胁迫下茴香通过增加可溶性糖的含量来实现渗透调节,高盐胁迫下茴香通过增加脯氨酸含量来实现渗透调节。
Content of chlorophyll,relative permeability of plasma membrane,MDA,proline content and soluble sugar content under different conditions of salt stress were measured using the fennel variety ＂Denong Number 1＂ as material.The results showed that the content of chlorophyll in leaf increased first and then decreased.Proline content had no significant difference with the treatment of lower salt concentration,but it increased rapidly and was higher than CK by 27.9% at salt concentration of 6mg/g.Meanwhile,the damage degree of plasma membrane aggravated as well.Low salt concentration reduced accumulation of MDA,while high salt concentration promoted synthesis of MDA.The highest content of MDA was 32.0μmol/g at the treatment of 10mg/g salt concentration.However,soluble sugar content showed the opposite tendency.Therefore,it was possible that osmostic adjustment of fennel was regulated by soluble sugar content under mild salt stress,and it was regulated by proline content under severe salt stress.
出处
《河南农业科学》
CSCD
北大核心
2011年第12期126-128,132,共4页
Journal of Henan Agricultural Sciences
基金
山东省农业良种工程项目[鲁科农字(2009)103号]
关键词
盐胁迫
茴香
生理特性
叶绿素含量
渗透调节
Salt resistance
Fennel
Physiological indexes
Content of chlorophyll
Osmosticadjustment
