我国洛阳与菏泽牡丹主栽园区AM真菌多样性研究

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

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。

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 density 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. Species 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 Wangcbeng Garden, while G constrictum was the dominant species in Heze Tree-peony Nursery, 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.