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Effects of Culture Filtrates of Three Common Seed Fungi on the Growth of Rice Seedling

A. B. Basak
Department of Botany University of Chittagong Chittagong, Bangladesh.

A. U. Mridha
Department of Botany University of Chittagong Chittagong, Bangladesh.

Abstract/ Executive Summary:

The present experiment was under- taken to study the effect of culture filtrates of three common seed-borne fungi on root and shoot length of seed- ling of five selected rice cultivars, To determine the effect of culture filtrates of Drechslera oryzae. Fusarium moniliforme asd Curvularia lunata, a loop full of conidia from 15 days old PDA culture was transferred to an Erlenmeyer flask containing 250 mI. Potato dextrose broth (Reddy and Bagyraj, 1-969) separa- tely on 500ml flasks, After 10 days ofincubation at room temperature. the culture solution was filtered with the helpof Whatman paper No. 42. The culturefiltrate thus obtained was tested fOJ'its effect on seedling growth of five rice cuttivars ( Pajam, Naizershail, DR.3.IR·20 and BR- 7). One hundred sterilizedseeds from each selected rice cultivar was ernersed in 20ml. culture filtrate of each fungus separately. Two control lets, onewith sterilized distilled water and otherwith blank liquid medium were also maintained. The seeds were removed from culture filtrate after 24 hours and washed thoroughly with distilled water repeatedly and they were placed on blo-tter. After 120 hours, the length of root and shoot were recorded.

Keywords: Effect, Filtrates, Common seed, Rice seedling

Location:

Start Date:

End Date:

Program Area: Pest Management

Commodity: Rice

Objectives:

To study the effect of culture filtrates of three common seed-borne fungi on root and shoot length of seed- ling of five selected rice cultivars,

Methodology:

To determine the effect of culture filtrates of Drechslera oryzae. Fusarium moniliforme asd Curvularia lunata, a loop full of conidia from 15 days old PDA culture was transferred to an Erlenmeyer flask containing 250 mI. Potato dextrose broth (Reddy and Bagyraj, 1-969) separa- tely on 500ml flasks, After 10 days of incubation at room temperature. the culture solution was filtered with the help of Whatman paper No. 42. The culturefiltrate thus obtained was tested for 'its effect on seedling growth of fiverice cuttivars ( Pajam, Naizershail, DR.3.IR·20 and BR- 7). One hundred sterilized seeds from each selected rice cultivar was ernersed in 20ml. culture filtrate of each fungus separately. Two control lets, onewith sterilized distilled water and otherwith blank liquid medium were also maintained. The seeds were removed from culture filtrate after 24 hours and washed thoroughly with distilled water repeatedly and they were placed on blo-
tter. After 120 hours, the length of rootand shoot were recorded.

Source of Information: -Bangladesh J. Agril. Sci. 11 (1) ]01-102: 1984 ISSN

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

The root and shoot length of Pajam and only shoot length 011 Naizershail and BR-7 increased when the seeds were treated with culture filtrate of F. monili- forme. 011 the other hand, the root and shoot length of seedling in all the cultivars decreased when treated with culture filtrate of D. oryzae, C. lunate was found to exert no such effeets either in increasing or decreasing the root and shoot and shoot of seedling. So it is obvious that the increase or decrease in length of root and shoot of rice seedling observed in the per sent experiment have been due to the phytohormones or phytotoxic substances secreted by seed fungi in the culture medium

Knowledge Management: Journal