Preliminary screening for potential antagonist organisms against Poria hypolateritia of red root disease

Noor Fazila Mohamed Yahaya (2007) Preliminary screening for potential antagonist organisms against Poria hypolateritia of red root disease. University Malaysia Sabah. (Unpublished)


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Poria hypolalerilia is categorized under root disease pathogen for tea plants which can bring fatality to tea bushes. The objective of this study was mainly on preliminary screening for potential antagonist organisms against Poria. Dual culture method was practiced in order to see the interaction between Poria and soil isolates. This method was slightly modified by allocating Poria in the middle and the soil isolate was inoculated 2 cm from the periphery of the plate; opposite to each other. The soil isolates was labeled as NF 1, NF 2, NF 3, NF 4, NF 5, NF 6, NF 7, NF 8, NF 9, NF 10, NF 11 and NF 12. After 12 days of interaction, solely two isolates; NF 1 and NF 5 were pointed as potential antagonist organisms with the percentage of inhibition in radius growth (PIRG) of 86.67 percent and 85.33 percent respectively. But, both isolates were virtually in the same genus. Through microscopic examination, NF 1 was suspected to be Cunninghamella. Other successfully isolated fungi are Trichoderma, Stylopage, Verticillium, Blastomyces, Ovulariopsis, Periconia and Ustilago. The rest of the fungi showed either agonism or mutualism interaction against Poria. Further study need to be implemented considering the interaction that might be practiced in the natural environment as one the vital criteria. Besides, research on the capability of agonist organisms need to be done as they also can be pointed as potential inhibitors. The impact of agonist organisms on tea's growth needs detail evaluation and strong evidence prior to commercializing them.

Item Type: Academic Exercise
Uncontrolled Keywords: Poria hypolalerilia, tea plant, root disease pathogen, dual culture method, soil
Subjects: R Medicine > RV Botanic, Thomsonian, and eclectic medicine
Divisions: SCHOOL > School of Science and Technology
Date Deposited: 14 May 2014 13:12
Last Modified: 13 Oct 2017 11:52

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