The effect of plant growth promoting rhizobacteria (PGPR) from Sabah tea plantation on the growth performance of Amaranthus Gangeticus L.

Iylia Huzaifah ZAmri, (2014) The effect of plant growth promoting rhizobacteria (PGPR) from Sabah tea plantation on the growth performance of Amaranthus Gangeticus L. Universiti Malaysia Sabah. (Unpublished)

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Abstract

This study was carried out to test the effect of plant growth promoting rhizobacteria (PGPR) isolated from tea roots on the growth performance of red spinach, Amaranthus gangeticus L.. The mode of action of the PGPR that have been focused were the ability in synthesizing particular compounds of plant growth regulator (auxin) and facilitating nutrient uptake such as phosphorus and nitrogen. A total of 17 selected strains were tested in laboratory for its capability in producing auxin and/or exerting phosphate solubilizing activity. The auxin (IAA) concentration was determined by using spectrophotometer at 535 nm. Although the result showed no significant difference between the isolates, the IAA produced varied based on the PGPR strains. Phosphate solubilizing and nitrogen fixing ability were qualitatively determined with PVK's and N-free medium respectively. Almost all isolates were capable in fixing atmospheric nitrogen, while only six isolates has ability in phosphate solubilizing. Isolate 53 was the only bacteria that showed positive reaction on antifungal activity against red root disease and basal stem rot of oil palm. In the pod trial, 20 treatments including two control sets of red spinach were measured based on the plant growth parameters such as plant height, leaf area, total dry weight, soil pH and electrical conductivity (EC). The red spinach treated with selected PGPR strains showed significant difference over control on the mean of plant height, leaf area and total dry weight. As for soil pH and EC, the results diversified between the inoculated soil and non-inoculated soil, since numerous factors may contribute to such findings, especially in the field condition. In short, isolate 510 was observed as the best among the isolated PGPR strains from Sabah Tea roots, due to the fact that it has all beneficial traits in improving plant growth performance of red spinach, Amaranthus gangeticus L..

Item Type: Academic Exercise
Uncontrolled Keywords: plant growth, rhizobacteria, tea roots, growth performance, red spinach
Subjects: S Agriculture > SB Plant culture
Divisions: FACULTY > Faculty of Sustainable Agriculture
Depositing User: Munira
Date Deposited: 24 Jul 2018 01:22
Last Modified: 24 Jul 2018 01:22
URI: http://eprints.ums.edu.my/id/eprint/42

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