Plant growth-promoting bacteria and silicon fertilizer enhance plant growth and salinity tolerance in Coriandrum sativum

Plant growth-promoting bacteria (PGPB) and silicon (Si) can augment salinity tolerance in plants. In this study, 25 potential PGPB were isolated from alfalfa rhizosphere and screened for their ability to synthesize indole-3-acetic acid, 1-aminocyclopropane-1-carboxylate deaminase, and solubilize tri...

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Bibliographic Details
Published in:Journal of plant interactions 2019-01, Vol.14 (1), p.386-396
Main Authors: Al-Garni, Saleh M. S., Khan, Md Mohibul Alam, Bahieldin, Ahmed
Format: Article
Language:English
Subjects:
1-Aminocyclopropane-1-carboxylate deaminase
Acetic acid
Alfalfa
Bacteria
Calcium phosphates
coriander
Coriandrum sativum
Fertilizers
Indoleacetic acid
Moisture content
Peroxidase
Phenolic compounds
Phenols
Photosynthesis
Photosynthetic pigments
Phylogeny
phytohormones
Pigments
Plant growth
plant growth-promoting bacteria
Pseudomonas
Rhizosphere
rRNA 16S
Salinity
Salinity effects
Salinity tolerance
Salt tolerance
Silicon
Strains (organisms)
Tricalcium phosphate
Water content
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Summary:Plant growth-promoting bacteria (PGPB) and silicon (Si) can augment salinity tolerance in plants. In this study, 25 potential PGPB were isolated from alfalfa rhizosphere and screened for their ability to synthesize indole-3-acetic acid, 1-aminocyclopropane-1-carboxylate deaminase, and solubilize tricalcium phosphate. Two promising strains were tentatively identified as Pseudomonas pseudoalcaligenes (KB-10) and P. putida (KB-25) based on phenotypic, biochemical and 16S rRNA gene phylogeny. Subsequently, a pot experiment was conducted to evaluate the effectiveness of KB-10 and KB-25 treatment, alone or in combination with Si fertilizer, in alleviating salinity stress in coriander. The results showed that treatment with PGPB strains and/or Si significantly increased relative water content, concentrations of photosynthetic pigments, peroxidase activity, total biomass, salt tolerance index, and reduced salt-induced total phenolic contents. Overall data suggested that the combined application of PGPB and Si fertilizer could be a feasible and effective approach to improve growth and salinity tolerance in coriander.
ISSN:1742-9145
1742-9153
DOI:10.1080/17429145.2019.1641635