ISSN: 0973-7510

E-ISSN: 2581-690X

Assiri Klangsawad1 and Petcharat Thummabenjapone1,2
1Plant Pathology Division, Department of Plant Science and Agricultural Resources,
Faculty of Agriculture, Khon Kaen University, Khon Kaen – 40002, Thailand.
2Agricultural Biotechnology Research Center for Sustainable Economy, Khon Kaen University, Khon Kaen – 40002, Thailand.
J. Pure Appl. Microbiol., 2016, 10 (2): 947-957
© The Author(s). 2016
Received: 02/02/2016 | Accepted: 30/03/2016 | Published: 30/06/2016
Abstract

Streptomyces-PR87 has potential to control plant pathogens and promote plant-growth. This research aims to, develop the application of Streptomyces-PR87 for tomato-growth enhancement and determine plant-growth promoting mechanisms. Results, the efficient protocol was weekly interval cell suspension spraying OD600 = 1 volume 200 mL / tray 4 times. Seedling was showed the increasing of plant height, number of true leaf, SPAD value, root area and biomass. Continuous spraying  OD600 = 1, 20 mL/plant at after transplanting, 12 weeks was promoted plant high, SPAD value, number of inflorescence, fruit set inflorescence and also increased yield up to 50-60 percent, flesh thickness 16-20 percent, fruit firmness 24-66 percent and percentage of Brix. Response of 6 tomatoes varieties on spraying application was showed well growth and non-appeared negative effected. Streptomyces– PR87 has mechanisms involved plant-growth promotion including biosynthesized indole-3-acetic acid via tryptophan dependent pathway with the highest level was 3.07 µg/ mL, the highest phosphate solubility index was 2.0 and presented of siderophore activity.

Keywords

Plant-growth promoting bacteria (PGPBs), Indole-3-acetic acid (IAA), Phosphate-Solubilizing Microorganism (PSMs), Siderophore, Lycopersicon esculentum.

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© The Author(s) 2016. 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.