东溪小仙桃对淹水胁迫的生理响应  

Response of Dongxixiaoxian peach to waterlogging stress

作　　者：张慧琴[1] 马常念[1] 谢鸣[1] 肖金平[1] 周利秋[1] 

机构地区：[1]浙江省农业科学院园艺研究所,浙江杭州310021

出　　处：《浙江农业学报》2015年第6期976-980,共5页Acta Agriculturae Zhejiangensis

基　　金：国家桃产业技术体系杭州综合试验站(CARS-31-Z-06);浙江省果品农业新品种选育重大科技专项(2012C12904-4)

摘　　要：为探索东溪小仙桃对淹水的耐受性和生理反应,文章以砧木毛桃为对照,在人工控水模拟淹水胁迫条件下,测定了东溪小仙桃的丙二醛含量、超氧化物歧化酶和过氧化物酶活性、叶绿素含量及根系活力、细胞膜透性和光合荧光参数等生理指标。结果表明:淹水胁迫下,随着淹水时间的延长,两个品种的根系活力、叶绿素含量和叶绿素荧光参数均呈下降趋势,但东溪小仙桃降低幅度小于毛桃;而叶片细胞膜透性和丙二醛含量随着胁迫时间的延长呈递增趋势,东溪小仙桃的增加幅度则显著低于毛桃;超氧化物歧化酶和过氧化物酶活性均呈先升后降的趋势,而东溪小仙桃的两种保护酶活性均高于毛桃。东溪小仙桃对淹水胁迫的耐受性要显著强于毛桃。Physiological characteristics of rootstock Maotao and new peach cultivar Dongxixiaoxian were investigated under water controlled conditions,so as to reveal the possible mechanisms of Dongxixiaoxian in response to waterlogging stress. The waterlogging resistance capacity of these two peach cultivars were evaluated comprehensively by the content of membrane lipid peroxidation products malondialdehyde（ MDA）,superoxide dismutase（ SOD） activity,peroxidase（ POD） activity and chlorophyll content,root activity,cell membrane permeability,and photosynthesis and chlorophyll fluorescence parameters. The results showed that the root activity,the content of chlorophyll,Yield,ETR,Fv / Fm of two cultivars decreased with the increase of waterlogging days. And the decreases in Dongxixiaoxian were less significantly than in Maotao. Meanwhile,the content of MDA and cell membrane penetrability were increased with the increase of waterlogging days,and the increases in Maotao were more significant than in Dongxixiaoxian. The activities of superoxide dismutase（ SOD） and peroxidase（ POD） of two cultivars exhibited the pattern of increase firstly then decrease,but two activities in Dongxixiaoxian were more significant than in Maotao. So the waterlogging resistance capacity of Dongxixiaoxian was significantly stronger than that of Maotao.

关 键 词：桃 淹水 光合特性 生理指标 

分 类 号：S662.1[农业科学—果树学]