干旱胁迫对德国补血草气孔特征及生理特性的影响  

Effect of Drought Stress on Stomatal and Physiological Characteristics of Limonium tataricum

作　　者：胡妍妍[1] 白利娟[1] 张婷[1] 郑鑫[1] 曾丽荣[1] 骆建霞[1] 

机构地区：[1]天津农学院园艺园林学院,天津300384

出　　处：《湖北农业科学》2015年第20期5066-5069,共4页Hubei Agricultural Sciences

基　　金：天津市林业技术成果转化项目(201002240);天津农学院科研项目(2013N11)

摘　　要：以德国补血草（Linminoium tataricum L.）为试材,研究干旱胁迫对德国补血草气孔特征及生理特性的影响。结果表明,土壤相对含水量50%（轻度干旱胁迫）时,德国补血草植株表现正常,土壤相对含水量为35%（中度干旱胁迫）和25%（重度干旱胁迫）时,叶片出现萎蔫枯死现象;随着干旱胁迫程度的增加,根系活力呈下降趋势,气孔密度呈上升趋势,气孔开张度则大幅度下降;对照（土壤相对含水量70%-80%）与土壤相对含水量50%处理下的根系活力和丙二醛含量差异不显著,但均极显著高于土壤相对含水量35%和25%的中度、重度干旱胁迫处理。叶片的超氧化物歧化酶活性呈先下降后升高的趋势;复水后,各干旱胁迫处理的植株均能恢复生长,恢复所需时间随着干旱胁迫程度的加重而增加。综合各指标分析认为,德国补血草具有较强的耐旱能力。Stomatal and physiological characteristics of Linminoium tataricum L. were studied under drought stress. The results showed that L. tataricum showed normal performance under slight drought stress with 50 % of soil relative water content（SRW）, while L.tataricum leaves appeared wilt or dead with 35% SRW and 25% SRW. With the drought stress increased,root activity decreased and stomatal density increased, while stomatal opening degree decreased significantly. The root activity and MDA content in CK（SRW 70% to 80%） was not significantly different from that in 50% SRW, but was significantly higher than that in 35% SRW and 25% SRW. SOD activity showed an increasing trend after the first fall. The plants treated with different drought stress could grow again after re-watering. The recovery time extended with the drought stress increased.In conclusion, L. tataricum has strong drought-enduring ability.

关 键 词：德国补血草(Linminoium tataricum L.) 干旱胁迫 气孔特征 生理特性 

分 类 号：Q949.774.2[生物学—植物学] Q948.112.3