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.
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)
