不同砧木嫁接对无籽西瓜部分生理指标的影响

以‘郑抗无籽10号’西瓜为材料，采用田间试验、植物生理生化测定等方法, 研究不同砧木嫁接对无籽西瓜生长过程中叶片生理指标的影响。结果表明：嫁接能提高无籽西瓜3个生长时期叶片叶绿素含量、可溶性糖含量和C/N，且能提高叶片POD、SOD、CAT和PPO活性，降低叶片MDA含量；不同砧木嫁接无籽西瓜叶片POD、SOD、CAT和PPO活性以及MDA含量变化规律基本一致；但不同的嫁接组合表现有差异，其中以长葫1号为砧木的嫁接苗表现较为突出。叶片光合和抗性相关生理指标可以作为无籽西瓜砧木品种筛选的参考依据之一。

Influence of Several Physiological Indicators on Grafted Seedless Watermelon of Different Stocks

The effects of different stocks on physiological indicators in leaves of grafted seedless watermelon(variety ‘Zhengkang 10’) during the process of growth were studied by field experiment and physiological determination.The results showed that the contents of chlorophyll and soluble sugar,C/N ratio,and the activities of Peroxidase(POD),Superoxide Dismutase(SOD),Catalase(CAT) and Polyphenol oxidase(PPO) in leaves of grafted plants at three growing periods were all higher than those of own-rooted plants,while the contents of Malondialdehyde(MDA) were lower.The activities of POD,SOD,CAT and PPO,and the contents of MDA in leaves of different stocks grafted on seedless watermelon had the same variation during growth process.There were differences among different grafted combinations and changhu-1 stock was more prominent.Accordingly,photosynthesis and resistance related physiological indicators in leaves of grafted seedless watermelon can be used as one of the referenced indexes for the screening of stock species.