Endogonaceous spore flora of Pakistan. IX. Frequency of occurrence of VAM fungi in wheat fields around Punjab University Campus area
Abstract
For the screening of Endogonaceous spore types the rhizosphere soil was sampled randomly from three adjacent wheat fields around new University campus. Spore extraction was done following wet sieving and decanting technique and direct soil paste method. Decaying root pieces and sheathing leaf bases on decaying wheat stumps were also studied after staining. A total of forty spore types were recorded from soil samples and decaying plant debris. Species of Glomus predominated the samples. There were twenty-eight species of Glomus recorded in the soil samples. One Glomus species i.e., Glomus monosporum formed sporocarps in the decaying sheathing leaf bases of left over wheat stumps after the crop was harvested. Four species of Acaulospora, three species of Sclerocystis, two species each of Gigaspora and Scutellospora were recorded. Among highly abundant species were Glomus fasciculatum, G. mosseae, G. constrictum, G. aggregatum, and G. microaggregatum.
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