我国洛阳与菏泽牡丹主栽园区AM真菌多样性研究

为探明我国特有花卉牡丹（Paeonia suffruticosa）根围内的丛枝菌根（AM）真菌资源状况,作者对河南省洛阳市与山东省菏泽市牡丹主产区土壤中的AM真菌进行了调查。共分离到AM真菌5属35种,其中球囊霉属（Glomus）在各采样点相对多度最高,其次是无梗囊霉属（Acaulospora）。两地土壤中AM真菌种的丰度、孢子密度和物种多样性指数等存在差异：菏泽赵楼牡丹园AM真菌种的孢子密度最高,而其种的丰度最低;洛阳矬里牡丹种苗基地的孢子密度最低;菏泽种苗基地的Shannon-Wiener指数显著高于其他样地。地球囊霉（Glomus geosporum）是洛阳王城公园和菏泽赵楼牡丹园的优势种;缩球囊霉（Glomus constrictum）为洛阳土桥花木基地、洛阳牡丹园、菏泽牡丹种苗基地和菏泽赵楼牡丹园的优势种。本研究结果表明我国牡丹主栽园区AM真菌具有丰富的多样性。

AM fungi diversity in the main tree-peony cultivation areas in China

In order to characterize arbuscular mycorrhizal(AM) fungal resources in the rhizosphere of tree-peony(Paeonia suffruticosa),we collected soil and root samples,and isolated 35 species in five genera of AM fungi from the main tree-peony cultivation areas,Heze and Luoyang of China. Glomus showed the highest relative abundance,followed by Acaulospora. There were differences in species richness,spore den-sity and species diversity of AM fungi between the two regions. Spore density in the rhizospheric soil of tree-peony grown in Heze Zhaolou Tree-peony Garden was highest,while in soil of the Luoyang Cuoli Tree-peony Nursery it was lowest. The species richness in Heze Zhaolou Tree-peony Garden was lowest. Spe-cies diversity in the rhizospheric soil of tree-peony grown in Heze Tree-peony Nursery was significantly higher than in other sampling sites. Glomus geosporum was the dominant species in Heze Zhaolou Tree-peony Garden and Luoyang Wangcheng Garden,while G. constrictum was the dominant species in Heze Tree-peony Nurs-ery,Heze Zhaolou Tree-peony Garden,Luoyang Tuqiao Seedling Nursery and Luoyang Tree-peony Garden. The results suggest that AM fungal diversity is rich in the main tree-peony cultivation areas.