Selection of bioinoculants for tomato growth enhancement and pathogen resistance

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Published: Sep 30, 2017
DOI: https://doi.org/10.14456/apst.2017.37
Keywords:
plant growth promoting rhizobacteria (PGPR) Serratia marcescens Bacillus licheniformis. chitinase phosphate solubilization antifungal activity

Main Article Content

Kedsukon Maneewan
Research Unit on Natural Antioxidant Innovation, Department of Biotechnology, Faculty of Technology, Mahasarakham University, Mahasarakham, Thailand.
Nittaya Khonsarn
Research Unit on Natural Antioxidant Innovation, Department of Biotechnology, Faculty of Technology, Mahasarakham University, Mahasarakham, Thailand.

Abstract

Bioinoculants were selected based on their ability to produce chitinase solubilized phosphate and demonstrate antifungal activity both on an agar medium and in a quantitative assay using a broth medium. It was demonstrated that Serratia marcescens and Bacillus licheniformis exhibited these attributes to a significantly greater degree (p<0.1) than other strains tested. The effects of S. marcescens, B. licheniformis and a mixed culture of S. marcescens and B. licheniformis on seed germination of tomatoes (Lycopersicon esculentum Mill. cv. Seeda) were evaluated in an in vitro culture. S. marcescens and the mixed culture showed a significantly (p<0.01) higher seed germination. The seedlings grew to a greater height and weight than those recorded when using B. licheniformis or the control (no bioinoculant). S. marcescens and the mixed culture were also studied for their effects on growth and pathogen resistance in pot culture of tomatoes under field conditions. The results demonstrated that both of these bioinoculants exhibited significantly (p>0.01) increased fresh and dry weights as well as greater height of the tomato plants compared to the control. Upon infestation of tomatoes with the pathogenic fungus, Fusarium solani, tomatoes with both bioinoculants showed significantly  (p<0.1) increased resistance to the pathogen. It was clear that bioinoculants could enhance growth and pathogen resistance of tomatoes under field conditions as well as under in vitro culture.


 

Article Details

How to Cite
Maneewan, K., & Khonsarn, N. (2017). Selection of bioinoculants for tomato growth enhancement and pathogen resistance. Asia-Pacific Journal of Science and Technology, 22(3), APST–22. https://doi.org/10.14456/apst.2017.37
Issue
Vol. 22 No. 3 (2017): September
Section
Research Articles

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