Abstract
Arbuscular mycorrhizal fungal (AMF) symbiosis was thought to be rare in wetland plant roots, although several recent studies suggested that this association might be important in wetland ecosystems. In this research work we have studied the distribution of AMF in the marshy and shoreline vegetation of Deepar Beel Ramsar site of Assam, India. The study reveals the percentage of mycorrhizal colonization in the roots of different plant species which were observed from 20.89 to 86.47% and particularly found larger among the members of the family Poaceae. The Vetiveria zizanioides L. from the family Cyperaceae showed the highest (86.47%) percentage of root colonization, however, only one plant species viz. Scirpus lateriflorus Gmel. from the same family was found to be nonmycorrhizal. The rhizospheric soil samples of most of the plant species were found to be dominated by Glomus morphotypes. All total 18 AMF morphotypes were recorded which comprises four genera viz. Glomus (66.67%), Acaulospora (16.66%), Gigaspora (11.11%) and Scutellospora (5.56%). The observation of diversity of AMF in 25 different plant species among the wetland plants gives a glimpse of AMF diversity and their host selectivity in the said ecosystem.
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