ISSN: 0973-7510

E-ISSN: 2581-690X

Research Article | Open Access
S. Sandhya1, Ramalingam Radhakrishnan1,2 , Ramaraj Sathasivam3, Muthukrishnan Arun4, Gurusaravanan Packiaraj5 and Sang Un Park3,6
1Department of Microbiology, Karpagam Academy of Higher Education, Coimbatore – 641 021, Tamil Nadu, India.
2Department of Botany, Jamal Mohamed College (Autonomous), Affiliated to Bharathidasan University, Tiruchirappalli – 620 020, Tamil Nadu, India.
3Department of Crop Science, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon 34134, Republic of Korea.
4Department of Biotechnology, Bharathiar University, Coimbatore – 641 046, Tamil Nadu, India.
5Department of Botany, Bharathiar University, Coimbatore – 641 046, Tamil Nadu, India.
6Department of Smart Agriculture Systems, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon 34134, Republic of Korea.
J Pure Appl Microbiol. 2021;15(4):2288-2294 | Article Number: 7163 | © The Author(s). 2021
Received: 08/07/2021 | Accepted: 04/10/2021 | Published: 17/11/2021

The endophytic microorganisms are believed to be an important bio-resource for modern agriculture because of their beneficial effects on plant growth promotion, biocontrol, stress tolerance, and diseases resistance. This study was focused to know the beneficial effect of endophytic bacterium (FRR2) isolated from the roots of Ficus religiosa L. on Amaranthus campestris L. and their tolerance ability against salinity and heavy metals. The strain FRR2 was recognized as Cellulosimicrobium sp. by 16s rRNA sequencing and phylogenetic study. The bacterial isolate FRR2 showed salt (at 150 mM NaCl) and metal (at 150 µM CuSO4 and 100 µM ZnSO4) tolerance ability and significantly higher growth rate of Amaranthus campestris in a green leafy vegetable might be due to the nitrogen fixation, indole acetic acid production, amylase and protease activities. In addition, the endophyte FRR2 application slightly increased the antioxidants activity than their controls. The results of this study revealed that Cellulosimicrobium sp. strain FRR2 would be an effective endophyte to increase the growth of green leafy vegetables.


Amaranthus campestris, Cellulosimicrobium sp., Endophytes, Heavy metal, Salinity

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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.