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Vesicular-arbuscular Mycorrhizal Association in Some Legume and Gramineae Species of the Jahangirnagar University Campus, Bangladesh

Zahed U. M. Khan
Department of Botany, Jahangtmagar University. Savar, Dhaka. Bangladesh.

M. A R Talukder
Department of Botany, Jahangtmagar University. Savar, Dhaka. Bangladesh.

A Z. M. Nowsher
Department of Botany, Jahangtmagar University. Savar, Dhaka. Bangladesh.

A. Khan
Department of Botany, University of Dhaka , Bangladesh.

Abstract/ Executive Summary:

Root materials of 16 species of Gramineae and 18 species of Leguminosae growing on laterite soil in the Jahangirnagar Uhiversity campus near Dhaka. Bangladesh were examined for vesicular- arbuscular (VA) mycorrhizae. All the examined plant species showed the colonization of VA mycorrhiza (VAM). but the extent of infection varied from species to species ranging from 4 to 46.66% and 6.77 to 62.50% in the graminaceous and leguminous species respectively. The extent of infection ranging from 21 to 30% was most 'frequent in both the families. Heterotrophic bacteria and fungi in the rhizosphere soils were found to have negative influence on the colonization of VAM in the plant roots.

Keywords: Leguminous plants, Gramtnacecus plants, Mycorrhizal

Location: Jahangtrnagar University campus

Start Date:

End Date:

Program Area: Knowledge Management

Non-commodity: Performance, Analysis and interpretations

Objectives:

To study the natural status of VAM in some leguminous and graminaceous plants growing on laterite soil of Jahangtmagar University campus.

Methodology:

The root materials were collected from the selected plants growing on laterite soil in the Jahangirnagar University campus. The soil developed under flood-free condition represents Kalma series and suffers from pronounced localized leching effect. The root samples were collected from 10 plants of each species. The samples were washed and cut into 1 cm long segments which were mixed to get composite root sample. The segments of each composite root sample were cleared with 10% KOH and stained with 0.05% trypan blue. The segments were examined under microscope for mycorrhizal infection. The extent of VA mycorrhizal colonization was estimated by the percentage of root length colonized by mycorrhiza. Observing under microscope, the length of tissue colonized by VAM in each of the 100 stained segments of a composite root sample was measured by an ocular micrometer, and the percentage of colonized root length was determined. Plate count method was followed using nutrient agar medium and Martin's rose-bengal agar medium for the determination of the population of heterotrophic bacteria and fungi respectively in the soils of the rhizosphere of selected plants.

Source of Information: Bangladesh J. Vol.23 (1) :61-66,1994 (june)

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

In Bangladesh, Mimosa pudica could be considered as the initial natural source of VAM, and Panicum repens L., Cynodon dactylon Pers. and Imperata cylindrica (L.) P. Beauv. could be considered as the stock plants to provide inoculum of VAM for further works. Heterotrophic bacteria and fungi in the rhizosphere soils were found to have negative influence on the colonization of VAM in the plant roots.

Knowledge Management: Journal