Journal of Agricultural Science and Botany

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Research Article - Journal of Agricultural Science and Botany (2021) Volume 5, Issue 6

Running title: Endophyte Co-treatment on Persian Oak Tree Evaluation of Endophyte Co-treatment on Persian Oak Tree (Quercus brant ii) Issue Type: Regular Issue

 All strains were able to produce auxin and gibberellin in different values. All of the isolates

able to solubilize phosphate. The outcomes of nitrogen fixation ability, protease, and
siderophore production diverged among strains. Picked isolates exhibited hormone production
properties as well as biocontrol influences according to tests. Co-treatment
of Streptomyces sp. Qb2-Pseudomonas sp. Qb, Streptomyces sp. Qb2-Bacillus sp. Qb
and Streptomyces sp. Qb2- Pseudomonas sp. Qb had a notable effect on seedling growth
parameters (P <0 ·001), oak species survival (P <0 ·001), and improved significantly the
longitudinal growth, diameter, and dry weight percent of seedlings (P <0 ·005)
Respectively. Streptomyces sp. Qb2 and Bacillus sp. Qb strains had the highest and lowest
inhibition effects on bacterial plant pathogen, Pseudomonas syringae. Streptomyces sp. Qb2
strains significantly promote root formation. To our understanding, this is the first record
of Streptomyces endophyte isolation from Iranian oak trees with biocontrol and growth
inducing impacts. It is also proposed to apply the co-treatment plan to increase biocontrol
effects and growth induction
Author(s): Yousef Azarakhsh

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