Gluconacetobacter diazotrophicus mitigates drought stress in Oryza sativa L

Background and aims Plant growth promoting bacteria (PGPB) are associated with plant roots and augment plant productivity and immunity; however, recent work by several groups has shown that PGPB also elicit the so-called “induced systemic tolerance” to drought stress. This work aimed to evaluate the...

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Bibliographic Details
Published in:Plant and soil 2020-06, Vol.451 (1-2), p.57-73
Main Authors: Filgueiras, Luanna, Silva, Renata, Almeida, Isabela, Vidal, Marcia, Baldani, José Ivo, Meneses, Carlos Henrique Salvino Gadelha
Format: Article
Language:English
Subjects:
Analysis
Bacteria
Biomass
Biomedical and Life Sciences
Crop yield
Crop yields
Cultivars
Drought
Ecology
Gas exchange
Gluconacetobacter diazotrophicus
Immunity
Inoculation
Life Sciences
Oryza longistaminata
Oryza sativa
Plant biomass
Plant growth
Plant Physiology
Plant roots
Plant Sciences
Plant tissues
Regular Article
Rice
Shoots
Soil Science & Conservation
Solutes
Water deficit
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Summary:Background and aims Plant growth promoting bacteria (PGPB) are associated with plant roots and augment plant productivity and immunity; however, recent work by several groups has shown that PGPB also elicit the so-called “induced systemic tolerance” to drought stress. This work aimed to evaluate the effect of Gluconacetobacter diazotrophicus Pal5 inoculation on the mitigation of drought stress in red rice ( Oryza sativa L.). Methods The experiment treatments of the red rice cultivar inoculated and uninoculated with G. diazotrophicus , and cultivated with and without water restriction. Physiological, biochemical, and molecular analyses of plant tissues were carried out, along with measurements of biomass and seed yield components. Results The plants showed a positive response to inoculation with G. diazotrophicus , with promotion of growth and induction of tolerance to drought. Increase in plant biomass and higher levels of gas exchange and osmoprotectant solutes were observed in shoots. The bacterial inoculation increased the yield and positively regulated some defense genes against the water deficit in plants. Conclusions G. diazotrophicus Pal5 strain inoculation was beneficial for red rice plants, suppressing the various deleterious effects of drought stress and increasing the biomass and seed yield components.
ISSN:0032-079X
1573-5036
DOI:10.1007/s11104-019-04163-1