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American Journal of Plant Physiology
  Year: 2020 | Volume: 15 | Issue: 1 | Page No.: 32-40
DOI: 10.3923/ajpp.2020.32.40
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Plant Developmental Stages Effect on Antifungal Activities of Fluorescent Pseudomonas under Controlled Environment

Eshetu Yilma and Tesfaye Alemu

Background and Objective: The status of the rhizosphere scheme changes on the basis of variables such as age of the plant, root area, temperature and others. Hence, this study is initiated to evaluate the effects of plant developmental age on antifungal activities of rhizospheric fluorescent Pseudomonas. Materials and Methods: The soil samples were collected from 0-20, 0-40 and 0-60 cm depth from cambisol soil, mixed thoroughly and filled in a pot. Then crops were planted in pot and sampling from the planted root area was taken 9 times at different developmental stages (every 15 days interval) and density and antifungal activity of fluorescent Pseudomonas were examined. Results: Out of these plant developmental stages, the highest density (using standard plate count method) and strongest antifungal activity of fluorescent Pseudomonas (by measuring growth inhibition zone on nutrient agar plate for the 72 h incubation at 37°C) were observed for both samples from Vicia faba L. and Zea mays L. When the age of the crops was 91 days after being planted in a pot, both crops were not flowered entirely but almost were ready. The density and antifungal activity were best recorded for Vicia faba L. for the soil sample 0-60 cm depth. In case of control pots (without planting), less (no) antifungal activity was seen while the density of the bacterium was declined until 76 days and after 76 days density remained same. Conclusion: This finding highlighted that considering the plant developmental stage during sampling is relevant in the process of isolating and identifying potential bacterial bio-control agents.
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How to cite this article:

Eshetu Yilma and Tesfaye Alemu, 2020. Plant Developmental Stages Effect on Antifungal Activities of Fluorescent Pseudomonas under Controlled Environment. American Journal of Plant Physiology, 15: 32-40.

DOI: 10.3923/ajpp.2020.32.40






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