AM Fungi Diversity In The Main Ornamental Gardens Of Chongqing Nanshan Botanical Park

Arbuscular mycorrhiza(AM) fungi have a universal distribution in the nature.It can affect the host plant on enhancing the resistance and the competitive ability for the adverse environment or the new environment by improving plant's absorbency on moisture and nutrients.The main soil is yellow sticky soil in the ornamental gardens of Chongqing Nanshan Botanical Park.It is not clearly of the AM fungi species and it's diversity which is close to the plants in the soil.AM fungi affect the survival and growth of transplanting plants.This paper presents the results of the AM fungi diversity in different plant plots.It will provide some basic reference data for the sustainable developing of soil quality and the survival rate of plants introduced and trained in Chongqing Nanshan Botanical Park.The main results are as follows:1 The 6 species in Rosaceae were all the arbuscular mycorrhizal plants.The Arum-type and Paris-type of arbuscules were observed.There were Arum-type arbuscules in plant roots of Cerasus serrulata,Malus halliana,Malus hupehensis,Prunus cerasifera and Rosa chinensis. There were Paris-type arbuscules in the roots of Amygdalus persica.The proportion of Arum-type to Paris-type was 5 to 1.The mycorrhizal infection rates of 6 species are different.2 There are 33 species in 5 genus identified from 64 soil samples in Camellia garden and Rosa garden.6 species belonged to Acaulospora,1 specie belonged to Entrophospora,4 species belonged to Gigaspora,20 species belonged to Glomus and 2 species belonged to Scutellospora. 29 strains have been identified to species and 4 strains to genus.4 species belonged to new records species reported in China those were Entrophospora schenckii;Gigaspora alboaurantiaca;Glomus lacteum and Glomus sputcum.3 The different host plants significantly affected the distribution of AM fungi.Eleven species of AM fungi belong to 2 genus were observed in soil samples from the rhizosphere of Camellia japonica.Nine species AM fungi belong to 4 genus were observed in soil samples from the rhizosphere of Camellia reticulate.Five species AM fungi belong to 2 genus were observed in soil samples from the rhizosphere of Amygdalus persica.Ten species AM fungi belong to 4 genus were observed in soil samples from the rhizosphere of Cerasus serrulata.Eight species AM fungi belong to 4 genus were observed in the soil samples from the rizosphere of Malus halliana.Four species AM fungi belong to 2 genus were observed in the soil samples from the rizosphere of Malus hupehensis.Four species AM fungi belong to 2 genus were observed in soil samples from the rizosphere of Prunus cerasifera.Two species AM fungi belong to 2 genus were observed in soil samples from the rizosphere of Rosa chinensis.4 There were at least 5 genus AM fungi were observed,including Gigaspora and Scutellospora, which reported infrequently in Changjiang drainage area.In all sample spots,Glomus had the most individual abundance and the highest frequency and abundance.5 The AM fungi density and richness were lower in the fall than in the spring.Glomus and Acaulospora were observed only in the fall soil samples;Acaulospora,Entrophospora, Gigaspora,Glomus and Scutellospora were observed in the spring soil samples.The diversity index of AM fungi from the rose soil samples were all the lowest both in spring and in fall than those of other samples.