水分胁迫对匍枝委陵菜形态及生理特性的影响  

Effect of water stress on morphological and physiological characteristics of Potentilla flagellaris

作　　者：赵婵璞[1] 王卫军[2] 刘冬云[1] 王倩[1] 

机构地区：[1]河北农业大学园林与旅游学院,河北保定071000 [2]河北农业大学林学院,河北保定071000

出　　处：《河北农业大学学报》2013年第5期34-38,共5页Journal of Hebei Agricultural University

基　　金：河北省教育厅项目:河北省野生耐阴性地被植物资源的收集筛选及应用研究(2010253)

摘　　要：为了解匍枝委陵菜(Potentilla flagellaris)对水分胁迫的适应性,研究了水分胁迫下匍枝委陵菜形态学指标变化,土壤含水量,超氧化物歧化酶(SOD)活性、过氧化物酶(POD)活性、丙二醛(MDA)、膜相对透性以及可溶性蛋白含量的变化。水涝胁迫40d后,POD、SOD、相对电导率、MDA含量比对照分别高出31.19%,21.05%,24.58%,29.46%;干旱胁迫下,SOD和POD活性则呈现上升后下降的趋势,40d时,POD、SOD、相对电导率、MDA含量比对照分别高出60.51%,33.33%,61.48%,64.70%。综合指标分析认为,匍枝委陵菜对水分胁迫具有较强的忍耐能力,且其耐涝性优于耐旱性。To investigate the reaction and adaptation of Potentilla flagellaris under water stress, the morphological indexes variation, together with water content of soil, superoxide dismutase （SOD）, peroxidase （POD）, malondialdehyde （MDA）, relative permeability of membrane, and content of soluble protein under water stress were researched. Results showed that under waterlogging stress, the POD, SOD, relative conductivity, and MDA con- tent were 31.19%, 21.05%, 24.58%, and 29.46% higher respectively than that of control after 40 days of treatment. Under drought stress, the activities of SOD and POD showed an in- crease first and then a decrease trend. After 40 days of drought treatment, the POD, SOD, relative conductivity, and MDA content were 60.51%, 33.33%, 61.48%, and 64.70% higher respectively than the control. In conclusion, P. flagellaris has strong tolerance to water stress, and the waterlogging tolerance is better than the drought tolerance.

关 键 词：匍枝委陵菜 水分胁迫 生理指标 

分 类 号：Q945.78[生物学—植物学]