Enhancement of Zea mays (L.) growth performance using indole acetic acid producing endophyte Mixta theicola isolated from Solenostemma argel (Hayne)

Hagaggi, Noura Sh. A.; Mohamed, Amal

doi:10.1016/j.sajb.2020.02.034

Cited by 27 publications

(19 citation statements)

References 54 publications

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“…Moreover, the consortium of our native PGPB, isolated from a durum wheat field, significantly improved some quenching parameters, especially PQ, as compared to the half and full doses of chemical fertilizer. Similar results reported that the inoculation of beneficial bacteria can induce systemic tolerance against salinity and drought stresses [38] and improve the efficiency of chemical fertilizer [36,37], which consequently resulted in reducing the amount of the chemical fertilizer consumption [39], upon some subsequent direct and indirect mechanisms such as bio-availability of soil nutrients [40,41], production of IAA [13], regulation of the expression of specific genes [42], and of carbohydrate metabolism [35], and synthesis of 1-aminocyclopropane-1-carboxylate (ACC) deaminase [43].…”

Section: Discussionsupporting

confidence: 65%

Changes in Photo-Protective Energy Dissipation of Photosystem II in Response to Beneficial Bacteria Consortium in Durum Wheat under Drought and Salinity Stresses

2020

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The present research aimed at evaluating the harmless dissipation of excess excitation energy by durum wheat (Triticum durum Desf.) leaves in response to the application of a bacterial consortium consisting of four plant growth-promoting bacteria (PGPB). Three pot experiments were carried out under non-stress, drought (at 40% field capacity), and salinity (150 mM NaCl) conditions. The results showed that drought and salinity affected photo-protective energy dissipation of photosystem II (PSII) increasing the rate of non-photochemical chlorophyll fluorescence quenching (NPQ (non-photochemical quenching) and qCN (complete non-photochemical quenching)), as well as decreasing the total quenching of chlorophyll fluorescence (qTQ), total quenching of variable chlorophyll fluorescence (qTV) and the ratio of the quantum yield of actual PSII photochemistry, in light-adapted state to the quantum yield of the constitutive non-regulatory NPQ (PQ rate). Our results also indicated that the PGPB inoculants can mitigate the adverse impacts of stresses on leaves, especially the saline one, in comparison with the non-fertilized (control) treatment, by increasing the fraction of light absorbed by the PSII antenna, PQ ratio, qTQ, and qTV. In the light of findings, our beneficial bacterial strains showed the potential in reducing reliance on traditional chemical fertilizers, in particular in saline soil, by improving the grain yield and regulating the amount of excitation energy.

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Section: Discussionsupporting

confidence: 65%

Changes in Photo-Protective Energy Dissipation of Photosystem II in Response to Beneficial Bacteria Consortium in Durum Wheat under Drought and Salinity Stresses

2020

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“…Plants treated with combined treatments of PGPB inoculants and chemicals (I + ½CF and I + CF) had significantly higher Chla content and chlorophyll concentration than untreated control plants in both stress and non-stress conditions. Actually, the increment of leaf chlorophyll concentration, as the light-harvesting antenna associated with PSI and PSII reaction center in the thylakoid membrane, can protect the photosynthetic machinery upon subsequent application of PGPB inoculation, likely owing to enhanced production of IAA (Kanagendran et al 2019), 1-aminocyclopropane-1-carboxylate (ACC) deaminase activity (Kumar et al 2019) and bio-availability of soil nutrients (Yaghoubi Khanghahi et al 2018b;Hagaggi and Mohamed 2020). A significant relationship between plant photosynthetic pigments and leaf nutrient concentration, such as N, P and K, has been widely found in crops (Liu et al 2019;Yaghoubi Khanghahi et al 2019a).…”

Section: Discussionmentioning

confidence: 99%

Photosynthetic responses of durum wheat to chemical/microbiological fertilization management under salt and drought stresses

2021

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The current research was carried out to evaluate the stress tolerance potential of durum wheat plants, in response to the inoculation of native plant growth-promoting bacteria (PGPB), through assessing PSII photochemistry and photosynthetic traits, as well as grain yield and plant height, and to investigate the possibility of using PGPB as a sustainable alternative or in combination with traditional fertilization plans. A greenhouse experiment included chemical/microbiological fertilization and stress (salinity and drought) treatments. The results indicated that the application of bacterial consortium of four PGPB markedly augmented some biochemical and functional traits in photosystem II, such as effective quantum yield of PSII photochemistry (Y(II)), electron transport rate of PSII (ETR), photosynthesis capacity, transpiration rate and stomatal conductance in unstressed plants, and prevented severe changes in the mentioned traits under drought and salinity conditions. The application of PGPB contributed to enhanced grain yield, too. Furthermore, a better performance of the PGPB inoculation was found in combination with half-dose of the recommended chemical fertilizers. In conclusion, PGPB inoculants maintain or improve the photosynthesis efficiency of durum wheat, grain yield and plant height, particularly under stress conditions, and can help to minimize the consumption of chemical fertilizers.

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“…The challenge of phosphorus deficiency in agricultural soil is usually remediated by the application of phosphorus Endophytic bacteria in agriculture 5-12 optimal concentration (Bhutani et al, 2018;Khan et al, 2016;Ribeiro et al, 2018;Shi et al, 2009;Xin et al, 2009). Numerous bacterial endophytes have been reported to promote plant growth by their ability to biosynthesize IAA (Hagaggi & Mohamed, 2020).…”

Section: Phosphate Solubilizationmentioning

confidence: 99%

“…In addition, it plays a significant role in stimulating root initiation (Nutaratat et al, 2016), root elongation, root hair formation, and branching (Ali & Vora, 2014;Grossmann, 2010;Halmann, 1990). The improvement in root surface area therefore has a positive effect on nutrients and water uptake and causes overall plant growth and development (Hagaggi & Mohamed, 2020).…”

Section: Indirect Plant Growth Promotionmentioning

confidence: 99%

Endophytic bacteria: a possible path towards a sustainable agriculture

Xavier¹,

Bosch²,

Karp³

et al. 2021

biori

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Enhancement of Zea mays (L.) growth performance using indole acetic acid producing endophyte Mixta theicola isolated from Solenostemma argel (Hayne)

Cited by 27 publications

References 54 publications

Changes in Photo-Protective Energy Dissipation of Photosystem II in Response to Beneficial Bacteria Consortium in Durum Wheat under Drought and Salinity Stresses

Changes in Photo-Protective Energy Dissipation of Photosystem II in Response to Beneficial Bacteria Consortium in Durum Wheat under Drought and Salinity Stresses

Photosynthetic responses of durum wheat to chemical/microbiological fertilization management under salt and drought stresses

Endophytic bacteria: a possible path towards a sustainable agriculture

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