Abstract: The grafted seedlings of Actinidia valvata Dunn., susceptible A. deliciosa A Chev. two rootstocks and Donghong, Hongyang, Xiangjihong three scion are used as experimental materials. This experiment detects the growth index of stem and leaf, the porosity of root, the relative permeability of membrane, MDA content and superoxide dismutase activity in different varieties of kiwi seedlings. The results show that the growth rate of grafted seedlings leaf in flood-resistant rootstock is more fast; and flood-resistant rootstock also increases the internode length. Under the flooding stress, the membrane permeability of the flood-resistant kiwi rootstock increased; porosity rate of increase in flood-resistant rootstock is higher than control rootstock; and the MDA content and SOD activity increases first and then decreases. In conclusion, compared with the A. deliciosa, A. valvata shows a strong resistance to flooding, and performance in growth.

Key words: kiwifruit, rootstock, waterlogging, growth, physiology