三个品种猕猴桃实生苗的耐涝性比较

以中华猕猴桃品种红阳、毛花猕猴桃品种华特和美味猕猴桃品种布鲁诺一年生实生苗为试材，研究了淹水处理对3个品种猕猴桃实生苗涝害指数、根系活力、细胞膜相对透性、丙二醛（MDA）含量、超氧化物歧化酶活性（SOD）及过氧化物酶（POD）活性的影响。结果表明，随着胁迫时间的延长，三种猕猴桃实生苗的涝害指数均呈上升趋势，其中布鲁诺的涝害指数最小；根系活力呈现下降趋势，在整个淹水处理过程中，华特的根系活力高于其他两个品种，但布鲁诺的根系活力下降幅度最小；叶片细胞膜透性和MDA含量呈递增趋势，在第5天时，布鲁诺的细胞膜透性和MDA含量的增长倍数最小； SOD和POD活性均呈先升后降的趋势，其中布鲁诺的这两种酶活性一直维持在较高的水平。由此可见，供试的3个猕猴桃品种，布鲁诺实生苗耐涝性最强。

Comparison on seedling waterlogging tolerance of three cultivars of Actinidia chinensis Planch

Using three cultivars of one-year-old kiwifruit seedlings Hongyang （Actinidia chinensis）， White （Actinidia eriantha Benth.） and Bruno （Actinidia deliciosa） as materials， we studied the influence of water-flooding on waterlogging index（WI）， root activity， membrane permeability， MDA content and the activities of SOD， POD. The treatment lasted for 5 days. The results showed that the WI of three cultivars of kiwifruit seedlings were increased with the stress time and the WI of Bruno was the lowest. The root activity decreased under waterlogging， though White had the highest root activity and Bruno had the smallest decrease compared with Hongyang and White. The cell membrane permeability of leaf and MDA content showed increasing trends. On the fifth day of waterlogging treatment， the cell membrane permeability and MDA content increased smallest in the seedlings of Bruno. The activity of SOD and POD throughout the 5-day waterlogging period had an increasing-decreasing tendency and Bruno always maintained a relatively high level of both SOD and POD activities. Thus, the tolerance of Bruno under waterlogging is higher than White and Hongyang.