Diversity and spatial distribution of arbuscular mycorrhiza fungi of phalanx clonal plant in the Mu Us desert

Abstract

Abstract: Three typical sites were chosen in the Mu Us sandland: A Research Station (110°11′22″E, 39°29′40″N), Yuling (109°42′54″E,38°20′07″N), and Wuhai (106°48′76″E , 39°46′47″N). Six colonization indexes (hypha, vesicular, arbuscular, hyphal coils, colonization potential, and spore density ) were used on roots of Artemisia ordosica and A. sphaerocephala in Auguest 2007. Colonizations of AM fungi were correlated with soil depth and sites. The species, distribution, and activity of AM fungi were affected by both the host plant and soil factors. Spore density in the rhizosphere of A. ordosica was higher then in that of A. sphaerocephala, and had a maximum value at the Yuling site. In Pearson’s correlation analysis, spore density was significantly negatively correlated with soil depth. Hyphal colonization was significantly positively correlated with vesicular colonization, but not with arbuscular colonization. The percentage of hyphal coils was significantly correlated with arbuscular colonization. The relativity of arbuscular in different sites and fine roots of host plant was remarkable. Both A. ordosica and A. sphaerocephala were excellent sand fixation plants which benefited from the mutualistic arbuscular-mycorrhizal symbiosis.

CLC Number:

SHAN Bao-qin, HE Xue-li, DUAN Xiao-yuan. Diversity and spatial distribution of arbuscular mycorrhiza fungi of phalanx clonal plant in the Mu Us desert[J]. Acta Prataculturae Sinica, 2009, 18(2): 146-154.

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