Phosphate-Solubilizing Enterobacter ludwigii AFFR02 and Bacillus megaterium Mj1212 Rescues Alfalfa’s Growth under Post-Drought Stress

Kang, ⋅Sang-Mo; Khan, Muhammad Aaqil; Hamayun, Muhammad; Kim, Lee-Rang; Kwon, Eun-Hae; Kang, Yo-Sep; Kim, Ki-Yong; Park, Jae-Jeong; Lee, In‐Jung

doi:10.3390/agriculture11060485

Cited by 21 publications

(4 citation statements)

References 86 publications

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“…Microbial inoculation confers drought stress tolerance to the plants partly by an induction in the growth hormone levels and acquisition to soil mineral content. This was demonstrated in a study conducted by Kang et al [100], in which the alfalfa plants were inoculated with two Enterobacter ludwigii strains, namely AFFR02 and Mj1212. The inoculated plants were assessed under drought stress for hormones and mineral concentrations.…”

Section: Endophytic Bacteria and Fungimentioning

confidence: 86%

Microbial Mitigation of Drought Stress in Plants: Adaptations to Climate Change

Khan¹,

Zulfiqar²

2023

Abiotic Stress in Plants - Adaptations to Climate Change

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The global temperature is constantly increasing due to the phenomenon of climate change. Plants have developed various mechanisms to defend themselves against environmental stresses including drought stress. Apart from indigenous biochemical, physiological, and molecular mechanisms of adaptation to stress, the plant-associated microbes may also play a crucial role in plant drought tolerance. The endophytic and rhizospheric microbes perform various functions and produce different enzymes and compounds that play an important role in plants’ adaptation to various environmental stresses including drought stress. Some of the key mechanisms include production of growth hormones, siderophores, organic acids, induction of the ROS scavenging system, phosphate solubilization, and nitrogen fixation. However, the production of ACC deaminase in the plant-associated microbes has vital roles in reduction of ethylene levels under drought stress, resulting in improved plant growth and stress tolerance. Owing to the complex nature of drought tolerance, a multi-pronged approach would have to be adapted to further enhance the microbial-mediated drought tolerance in plants.

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Section: Endophytic Bacteria and Fungimentioning

confidence: 86%

Microbial Mitigation of Drought Stress in Plants: Adaptations to Climate Change

Khan¹,

Zulfiqar²

2023

Abiotic Stress in Plants - Adaptations to Climate Change

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“…The prevalence of siderophore producers and phosphate solubilizers is very high in the isolated strains. In the case of phosphate solubility, this ability has been described as fundamental in drought-tolerant bacteria that are beneficial to plants, since such environments usually have very low availability [ 108 , 109 ]. Similarly, the production of siderophores under stress conditions has been related to a necessary mechanism in degraded or depleted land.…”

Section: Discussionmentioning

confidence: 99%

Geographically Disperse, Culturable Seed-Associated Microbiota in Forage Plants of Alfalfa (Medicago sativa L.) and Pitch Clover (Bituminaria bituminosa L.): Characterization of Beneficial Inherited Strains as Plant Stress-Tolerance Enhancers

Costa

Santos

Rebelo-Romão

et al. 2022

Biology

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Agricultural production is being affected by increasingly harsh conditions caused by climate change. The vast majority of crops suffer growth and yield declines due to a lack of water or intense heat. Hence, commercial legume crops suffer intense losses of production (20–80%). This situation is even more noticeable in plants used as fodder for animals, such as alfalfa and pitch trefoil, since their productivity is linked not only to the number of seeds produced, but also to the vegetative growth of the plant itself. Thus, we decided to study the microbiota associated with their seeds in different locations on the Iberian Peninsula, with the aim of identifying culturable bacteria strains that have adapted to harsh environments and that can be used as biotreatments to improve plant growth and resistance to stress. As potentially inherited microbiota, they may also represent a treatment with medium- and long-term adaptative effects. Hence, isolated strains showed no clear relationship with their geographical sampling location, but had about 50% internal similarity with their model plants. Moreover, out of the 51 strains isolated, about 80% were capable of producing biofilms; around 50% produced mid/high concentrations of auxins and grew notably in ACC medium; only 15% were characterized as xerotolerant, while more than 75% were able to sporulate; and finally, 65% produced siderophores and more than 40% produced compounds to solubilize phosphates. Thus, Paenibacillus amylolyticus BB B2-A, Paenibacillus xylanexedens MS M1-C, Paenibacillus pabuli BB Oeiras A, Stenotrophomonas maltophilia MS M1-B and Enterobacter hormaechei BB B2-C strains were tested as plant bioinoculants in lentil plants (Lens culinaris Medik.), showing promising results as future treatments to improve plant growth under stressful conditions.

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“…In another study conducted by Kang et al (2021) , two Enterobacter ludwigii strains, namely, AFFR02 and Mj1212, were isolated and inoculated into alfalfa plants; subsequently, their growth attributes, hormones, and mineral concentrations were assessed. The data showed that bacterial inoculation significantly rescued plants from drought stress.…”

Section: Microbes That Mitigate Drought Stressmentioning

confidence: 99%

“…The stalk diameter, fresh and dry biomass, and root/shoot elongation were all significantly higher in the treated plants than in the untreated plants. In addition, treated plants have higher levels of ABA, flavonoids, and minerals than those of untreated plants ( Kang et al, 2021 ).…”

Section: Microbes That Mitigate Drought Stressmentioning

confidence: 99%

Research Progress in the Field of Microbial Mitigation of Drought Stress in Plants

et al. 2022

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Plants defend themselves against ecological stresses including drought. Therefore, they adopt various strategies to cope with stress, such as seepage and drought tolerance mechanisms, which allow plant development under drought conditions. There is evidence that microbes play a role in plant drought tolerance. In this study, we presented a review of the literature describing the initiation of drought tolerance mediated by plant inoculation with fungi, bacteria, viruses, and several bacterial elements, as well as the plant transduction pathways identified via archetypal functional or morphological annotations and contemporary “omics” technologies. Overall, microbial associations play a potential role in mediating plant protection responses to drought, which is an important factor for agricultural manufacturing systems that are affected by fluctuating climate.

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Phosphate-Solubilizing Enterobacter ludwigii AFFR02 and Bacillus megaterium Mj1212 Rescues Alfalfa’s Growth under Post-Drought Stress

Cited by 21 publications

References 86 publications

Microbial Mitigation of Drought Stress in Plants: Adaptations to Climate Change

Microbial Mitigation of Drought Stress in Plants: Adaptations to Climate Change

Geographically Disperse, Culturable Seed-Associated Microbiota in Forage Plants of Alfalfa (Medicago sativa L.) and Pitch Clover (Bituminaria bituminosa L.): Characterization of Beneficial Inherited Strains as Plant Stress-Tolerance Enhancers

Research Progress in the Field of Microbial Mitigation of Drought Stress in Plants

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