持续干旱胁迫对中宁枸杞水分生理的影响

选用1 a生中宁枸杞扦插苗为试验材料,在土壤持续干旱胁迫条件下,对中宁枸杞叶片叶绿素含量、质膜相对透性、自由水含量、束缚水含量、相对含水量和水分饱和亏缺、水势进行了测定与比较。结果表明:随着干旱胁迫程度的增加和持续时间的延续,枸杞叶片的叶绿素含量、自由水含量、相对含水量和叶水势均呈明显下降趋势,而质膜相对透性、束缚水含量、水分饱和亏均呈上升趋势,土壤含水量为3.56%时进行复水,枸杞叶片仍具有一定的活力,表明中宁枸杞具有很强的抗旱性。

Effect of Drought Stress on Water Physiology in Lycium barbarum

With one-year seedlings of Lycium barbarum,physiological responses of the seedlings to soil persistent drought stress were investigated.The results showed that as intensification of the soil drought stress,the chlorophyll content,free water,relative water content and water potential in seedlings decreased,but membrane permeability,bound water,RWD increased.When water content of soil decreased to 3.56%,L.barbarum still kept vitality as the resumption of water supply,indicating the capability of drought resis...