ISSN: 0973-7510

E-ISSN: 2581-690X

Research Article | Open Access
Garima Gupta1 , Abhijit Das2, Prameela Jha2 and Prabhat N. Jha2
1Institute of Bioscience and Technology, Shri Ramswaroop Memorial University, Lucknow-Deva Road, Barabanki – 225 003, Uttar Pradesh, India.
2Department of Biological Sciences, Centre for Biotechnology, Birla Institute of Technology and Science, Pilani – 333 031, Rajasthan, India.
J Pure Appl Microbiol. 2021;15(4):2486-2497 | Article Number: 7017 | © The Author(s). 2021
Received: 06/06/2021 | Accepted: 26/10/2021 | Published: 27/11/2021

The present study was designed to compare the defense response of the host plant towards endophytic bacteria Pseudomonas aeruginosa PM389 and pathogenic bacteria Erwinia carotovora and to correlate the level of defense enzymes vis-a-vis bacterial colonization in the host. Wheat seedlings were treated with 107-108 cells ml-1 endophytic and pathogenic bacteria in the separate experimental set-up, and the level of plant defense enzyme was measured at various time intervals. Comparatively reduced level of most defense enzymes was produced in endophytic bacteria treated plants. While the endophytic bacterial population was almost constant after 24 HAI (hour after inoculation), the population of pathogenic bacteria kept fluctuating during the study period from 24 HAI. Unlike pathogenic bacteria, we observed attenuated defense response in challenged host plants towards endophytic bacteria, which helps endophytes establish inside plant. This study would be useful for understanding the mechanism of colonization and strategies of endophytes to fight against the host defense response.


Endophyte, Pseudomonas aeruginosa, defense enzymes, Erwinia carotovora

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© The Author(s) 2021. Open Access. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License which permits unrestricted use, sharing, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.