Diversity And Preliminary Selection Of Salt Resistant Strains Of AMF In Mangrove Of Hainan

As one of the most important and widespread plant-fungus symbioses, arbuscular mycorrhizal fungi has a great applied prospect in the areas such as agriculture, forestry, environment and etc. In this study, we investigated species diversity-and distribution of arbuscular mycorrhizal fungi asocciated with Mangrove plant located unartificially on Hainan island, and carry on the experiment on application of arbuscular mycorrhizl fungi at the same time. The results showed as follow:1. Mangrove plants growing in Bamen Bay were infected at varied degrees by arbuscular mycorrhizal fungi colonized by the hypha. Besides, the spore density of AMF seasonally changed in this area.2. Thirty-six species of AMF isolated from the soil samples were collected at the rhizosphere of13species of Mangrove plants in the five city on Hainan island,i.e.13species of Acaulospora,6species of Gigaspora,16species of Glomus and one of Fuscutata.Thereinto Fuscutata savannicola is a new record in China. According to the results, Acaulospora and Glomus were the dominant genus of all the AMF. Moreover, the species of Gigaspora and Fuscutata asocciated with Mangrove plants were found for the first time.3.Tomato Seedlinges which were infected with Glomus rubiforme, Glomus clavisporum, Acaulospora laevis isolated from the soil samples in this time were applicated to the salt-tolerant experiment for the selection of efficient salt-tolerant species. The results showed that Glomus rubiforme can significantly enhance the salt-tolerant ability of tomato.