Abstract
Plant growth-promoting bacteria (PGPB) represents a sustainable strategy to improve the adaptability of plants to water shortage stress. The present study demonstrated that the endophyte Klebsiella pasteurii BDA134-6, isolated from O. glaberrima rice grown in Mali (West Africa), efficiently colonized the durum wheat variety Primadur. Results obtained from laboratory growth chamber, greenhouse phenotyping platform, and tunnel-type greenhouse demonstrated that inoculated Primadur plants improved their response to water shortage stress. When water shortage stress was simulated by treatment with polyethylene glycol, neither a significant decrease in the relative water content of leaves nor a strong inhibition of acetylene reduction was observed for inoculated plants compared to the uninoculated ones. Inoculated plants subjected to water shortage stress showed increased activity of the antioxidant enzymes glutathione reductase and superoxide dismutase (up to 38% and 191%, respectively), a proline content 3-fold higher, a reduced hydrogen peroxide accumulation (up to 50%), and no significant alterations in lipids peroxidation and leaf senescence. These findings highlight that BDA134-6 is a promising strain. Field trial experiments will allow to evaluate whether it can be used to improve antioxidant defense systems in a plant species different from the native host plant.
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Claims 10
Claim · model-written summary
Klebsiella pasteurii BDA134-6 colonized Primadur wheat.
- Taxon
- durum wheat
Triticum turgidum subsp. durume0 - Material
- Primadure0
- Interactor
- Klebsiella pasteurii BDA134-6Klebsiella pasteuriie0symbiont
- Outcome
- colonizede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Klebsiella pasteurii BDA134-6, isolated from O. glaberrima rice grown in Mali (West Africa), efficiently colonized the durum wheat variety Primadur”
Claim · model-written summary
Inoculated Primadur had improved response to water shortage.
- Material
- Primadure0
- Treatment
- inoculatede0
- Outcome
- response to water shortage stresse0
- Direction
- improvede0
Not reportedTaxonComparator
Verbatim
e0“inoculated Primadur plants improved their response to water shortage stress”
Claim · model-written summary
Inoculation prevented significant loss of leaf relative water content under simulated stress.
- Treatment
- inoculated plantse0
- Outcome
- relative water content of leavese0
- Direction
- neither a significant decreasee0
- Comparator
- uninoculated onese0
Not reportedTaxon
Verbatim
e0“neither a significant decrease in the relative water content of leaves nor a strong inhibition of acetylene reduction was observed for inoculated plants compared to the uninoculated ones”
Claim · model-written summary
Inoculation prevented strong inhibition of acetylene reduction under simulated stress.
- Treatment
- inoculated plantse0
- Outcome
- acetylene reductione0
- Direction
- nor a strong inhibitione0
- Comparator
- uninoculated onese0
Not reportedTaxon
Verbatim
e0“nor a strong inhibition of acetylene reduction was observed for inoculated plants compared to the uninoculated ones”
Claim · model-written summary
Inoculated stressed plants increased glutathione reductase activity up to 38%.
Not reportedTaxonTreatmentComparator
Verbatim
e0“increased activity of the antioxidant enzymes glutathione reductase and superoxide dismutase (up to 38% and 191%, respectively)”
Claim · model-written summary
Inoculated stressed plants increased superoxide dismutase activity up to 191%.
Not reportedTaxonTreatmentComparator
Verbatim
e0“increased activity of the antioxidant enzymes glutathione reductase and superoxide dismutase (up to 38% and 191%, respectively)”
Claim · model-written summary
Inoculated stressed plants had threefold higher proline content.
Not reportedTaxonTreatmentComparator
Verbatim
e0“a proline content 3-fold higher”
Claim · model-written summary
Inoculated stressed plants reduced hydrogen peroxide accumulation up to 50%.
Not reportedTaxonTreatmentComparator
Verbatim
e0“a reduced hydrogen peroxide accumulation (up to 50%)”
Claim · model-written summary
Inoculated stressed plants showed no significant lipid peroxidation alteration.
Not reportedTaxonTreatmentComparator
Verbatim
e0“no significant alterations in lipids peroxidation and leaf senescence”
Claim · model-written summary
Inoculated stressed plants showed no significant leaf senescence alteration.
Not reportedTaxonTreatmentComparator
Verbatim
e0“no significant alterations in lipids peroxidation and leaf senescence”