[논문]Root Colonizing and Biocontrol Competency of Serratia plymuthica A21-4 against Phytophthora Blight of Pepper

Shen, Shun-Shan; Choi, Ok-Hee; Park, Sin-Hyo; Kim, Chang-Guk; Park, Chang-Seuk

doi:10.5423/ppj.2005.21.1.064

Root Colonizing and Biocontrol Competency of Serratia plymuthica A21-4 against Phytophthora Blight of Pepper 원문보기

The plant pathology journal, v.21 no.1, 2005년, pp.64 - 67

Shen, Shun-Shan (Division of Plant Resources and Environment, Gyeongsang National University) , Choi, Ok-Hee (Division of Plant Resources and Environment, Gyeongsang National University) , Park, Sin-Hyo (Division of Plant Resources and Environment, Gyeongsang National University) , Kim, Chang-Guk (Division of Plant Resources and Environment, Gyeongsang National University) , Park, Chang-Seuk (Division of Plant Resources and Environment, Gyeongsang National University)

Abstract ▼ AI-Helper

The biocontrol agent Serratia plymuthica A21-4 readily colonized on the root of pepper plant and the bacterium moves to newly emerging roots continuously. The colonization of A21-4 on the pepper root was influenced by the presence ofPhytophthora capsici in the soil. When P. capsici was introduced in advance, the population density of A21-4 on the root of pepper plant was sustained more than $10^6$ cfu/g root until 3 weeks after transplanting. On the other hand, in the absence of P. capsici, the population density of A21-4 was reduced continuously and less than $10^5$ cfu/g root at 21 days after transplanting. S. plymuthica A21-4 inhibited successfully the P. capsici population in pepper root and rhizosphere soil. In the rhizosphere soil, the population density of P. capsici was not increased more than original inoculum density when A21-4 was treated, but it increased rapidly in non-treated control. Similarly, the population density of P. capsici sharply increased in the non-treated control, however the population of P. capsici in A21-4 treated plant was not increased in pepper roots. The incidence of Phytophthora blight on pepper treated with A21-4 was 12.6%, while that of non-treated pepper was 74.5% in GSNU experimental farm experiment. And in farmer's vinyl house experiment, the incidence of the disease treated with the fungicide was 27.3%, but treatment of A21-4 resulted in only 4.7% of the disease incidence, showing above 80% disease control efficacy.

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가설 설정

, 2002). In this study, we investigated a root colonizing ability of the biocontrol agent S. plymuthica A21-4, its influence on population changes of P. capsici, and efficiency on control of Phytophthora blight of pepper in fields.

제안 방법

Field experiment: GSNU experiment: The roots of 50- day-old pepper seedlings (variety Nok-Kwang) were soaked in the bacterial suspension (109 cfii/ml) for one hour and transplanted to the green house. Experiment plot was arranged in randomized block design with four replicates, 26 plants per plot. The plants were cultivated in the greenhouse using common farming practices.

성능/효과

capsici. One month after transplanting, the incidence of Phytophthora blight was 74.5% in non-treated control, while it was only 12.6% in A21-4 treatment. The disease incidence of treated and non-treated plots were sustained until end of the crop season (Table 3).

참고문헌 (11)

Hur, J. M., Lee, Y. S., Kim, B. S. and Cho, C. H. 1990. Evaluation and Inheritance of Resistance to Phytophthora blight in Pepper. Korean J. Plant Pathol. 6:447-451
Kim, Y. G. 1995. Biological Control of Phytpphthora Blight of Redpepper by Antagonistic Bacillus Polymyxa 'AC-1'. Dr. D. Thesis. Seoul National Uni. Korea
Kaiser, W. J., Hannan, R. M. and Weller, K. M. 1989. Biological control of seed rot and pre-emergence damping-off of chickpea with fluorescent pseudomonads. Soil. Biol. Biochem. 21:269-273

상세보기
Kloepper, J. W., Zaboltowiz, R. M., Tipping, E. M. and Lifshitz, R. 1991. Plant growth promotion mediated by bacterial rhizosphere colonizers. In: The rhizosphere and plant growth. Edited by D. L. Keister and P. B. Cregan. pp. 315-326. Kluwer Academic Publishers, Cordrecht. the Netherlands
Nam, C. G., Jee, H. J. and Kim, C. H. 1988. Studies on Biological Cotrol of Phytophthora Blight of Red-pepper . Enhancement of Antagonistic Activity by soil Amendment with Organic Materials. Kor. J. Plant Pathol. 4:313-318
Park, K. S., Jang, S. W., Kim, C. H. and Lee, E. J. 1989. Studies on Biological Control of Phytophthora Blight of Red-pepper III. Formulations of Trichoderma harzianum and Pseudomonas cepacia Antagonistic to Phytophthora capsici and Their Preservation. Kor. J. Plant Pathol. 5:131-138
Schippers, B., Bakker, A. W. and Bakker, P. A. H. M. 1987. Interactions of deleterious and beneficial rhizosphere microorganisms and the effect of cropping practices. Annu. Rev. Phytopathology 25:339-358

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Schlub, R. L. 1983. Epidemiology of Phytophthora capsici on bell pepper. J. Agric. Sci. Camb. 100:7-11

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Shen, S. S., Kim, J. W. and Park, C. S. 2002. Serratia plymuthica strain A21-4: A Potential Biocontrol Agent Against Phytophthora Blight of Pepper. Plant Pathol. J. 18:138-141

원문보기 상세보기
Shen, S. S., Choi, O. H., Lee, S. M. and Park, C. S. 2002. In vitro and In vivo Activities of a Biocontrol Agent, Serratia plymuthica A21-4, Against Phytophthora capsici. Plant Pathol. J. 18:221-224

원문보기 상세보기
Weller, D. M. 1988. Biological control of soilborne plant pathogens in the rhizosphere with bacteria. Annu. Rev. Phytophthol. 26:379-407

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DOI : 10.5423/PPJ.2005.21.1.064 [무료]
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