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ISSN: 2157-7471

Journal of Plant Pathology & Microbiology
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Research Article

Growth Promotion and Bi-Control Approaches of Brown Root Rot Disease of Tea by Pseudomonas Aeruginosa (PM 105)

P Morang1*, BK Dutta1, BS Dileep Kumar2 and MP Kashyap3

1Microbial & Agricultural Ecology and Biodiversity conservation Laboratory, Department of Ecology & Environmental Science, Assam University, Silchar, Assam, India

2Agroprocessing and Natural Products Division, NIIST (CSIR), Thiruvanathapuram, Kerala, India

3Department of Business Administration, Assam University, Silchar, Assam, India

*Corresponding Author:
P Morang
Microbial & Agricultural Ecology and Biodiversity conservation Laboratory
Department of Ecology and Environmental Science
Assam University, Silchar
Assam, India 788011
Tel: 09864327718
E-mail: [email protected]

Received date: July 21, 2012; Accepted date: September 10, 2012; Published date: September 15, 2012

Citation: Morang P, Dutta BK, Dileep Kumar BS, Kashyap MP (2012) Growth Promotion and Bi-Control Approaches of Brown Root Rot Disease of Tea by Pseudomonas Aeruginosa (PM 105). J Plant Pathol Microb 3:129. doi:10.4172/2157- 7471.1000129

Copyright: © 2012 Morang P, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.


Pseudomonas aeruginosa (PM 105) isolated from tea (Camellia sinensis) plantation soil of Barak Valley, Assam, (India) showed biocontrol and growth promotion potential against the tea root pathogen Fomes lamoensis, infested one year old tea plants under nursery condition. In the in vitro antagonism study, PM 105 showed significant inhibition in all the three media (KB, NA and PDA) tested against the pathogen, both in spot and line inoculation. In the nursery experiment, tea plants treated with F. lamoensis alone showed 73% disease incidence, whereas in P. aeruginosa along with the pathogen showed reduced percentage of disease incidence (only 33.33%). An increase in number of new leaves (NNL), number of lateral branches (NLB), shoot height (SH) and root length (RL) was observed, following the application of the bacterial treatment. It was also observed the fresh weight of shoot (FWS), and root (FWR), dry weight of shoot (DWS), and root (DWR), chlorophyll a and b in P. aeruginosa treated plants, have also increased. The results indicate the biocontrol and plant growth promoting potentials of P. aeruginosa on tea.


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