Effects of AM Fungi on Salt Tolerance of Treepeony Seedlings

doi:10.11924/j.issn.1000-6850.2012-2788

Abstract

Abstract: The purpose of this study was to estimate the effects of AM fungi on salt tolerance of the annual and biennial treepeony seedlings. The annual and biennial treepeony‘Fengdan’seedlings grown in pots were inoculated with or without Glomus mosseae, and then treated with artificial sea water (0%, 8%, 16% and 24%). The results showed that under salt stress mycorrhizal colonization of biennial treepeony seedlings inoculated with G. mosseae were significantly higher than that of annual treepeony seedlings, while the leaf relative conductivity was significantly lower than that of annual treepeony seedling. Under salt stress increment, root activity, N, P and K content, and index of salt tolerance were significantly higher in biennial treepeony seedlings than in annual treepeony seedlings. Mycorrhizal dependence of annual treepeony seedlings was higher than that of biennial treepeony seedlings. The total dry weight, index of salt tolerance, mycorrhizal contribution of N, P and K in annual peony seedlings inoculated with G. mosseae were higher than in biennial treepeony seedlings, with the increase of salt mycorrhizal contribution were increased. It was suggested that the effects of AM fungi on annual treepeony seedlings be superior to biennial treepeony seedlings, and treepeony with different growth stages showed different mycorrhizal dependence.

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