Modulation of proline metabolic gene expression in Arabidopsis thaliana under water-stressed conditions by a drought-mitigating Pseudomonas putida strain

Ghosh, Daipayan; Sen, Sunetra; Mohapatra, Sridev

doi:10.1007/s13213-017-1294-y

Cited by 58 publications

(18 citation statements)

References 59 publications

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“…BjP5CSB is a key gene for proline biosynthesis which helps in the osmoregulation in plants. Upregulation of the BjP5CSB gene under drought stress has been reported in previous studies (Ghosh et al, 2017). This probably led to osmotic adjustment and improved stress tolerance in plants.…”

Section: Discussionsupporting

confidence: 71%

Amelioration of short‐term drought stress during different growth stages in Brassica juncea by rhizobacteria mediated maintenance of ROS homeostasis

Asha

Nivetha

Krishna

et al. 2021

Physiologia Plantarum

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In the present investigation, the role of rhizobacteria in alleviating the deleterious effects of drought on mustard was assessed. The plants were exposed to short-term water shortages, during the vegetative and reproductive growth stages. Drought stress in both stages had a negative effect on growth, physiological, and biochemical parameters of mustard. Both the root and shoot biomass were significantly reduced in plants exposed to drought, but rhizobacterial inoculation resulted in better plant biomass than uninoculated plants. The ameliorative effects of inoculation were also indicated by improved relative water content, membrane stability index, total chlorophyll content, and photosynthetic parameters. Similarly, inoculation resulted in

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Section: Discussionsupporting

confidence: 71%

Amelioration of short‐term drought stress during different growth stages in Brassica juncea by rhizobacteria mediated maintenance of ROS homeostasis

Asha

Nivetha

Krishna

et al. 2021

Physiologia Plantarum

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“…In a study on pshychrophilic diatom Fragilariopsis cylindrus , 2.5 fold increased up-regulation of p5cr gene significantly improved the salt tolerance and photosynthetic efficiency ( Krell et al, 2007 ). The up-regulated expression of p5cr gene has been reported to manage the proline metabolism in water-logged and drought stressed Arabidopsis plant also ( Ghosh et al, 2017 ). Proline is reported as a multiple abiotic and biotic stress alleviator molecules in various plans and microbes ( Willet and Burton, 2002 ; Liang et al, 2013 ).…”

Section: Discussionmentioning

confidence: 99%

Halotolerant Exiguobacterium profundum PHM11 Tolerate Salinity by Accumulating L-Proline and Fine-Tuning Gene Expression Profiles of Related Metabolic Pathways

et al. 2018

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Salinity stress is one of the serious factors, limiting production of major agricultural crops; especially, in sodic soils. A number of approaches are being applied to mitigate the salt-induced adverse effects in agricultural crops through implying different halotolerant microbes. In this aspect, a halotolerant, Exiguobacterium profundum PHM11 was evaluated under eight different salinity regimes; 100, 250, 500, 1000, 1500, 2000, 2500, and 3000 mM to know its inherent salt tolerance limits and salt-induced consequences affecting its natural metabolism. Based on the stoichiometric growth kinetics; 100 and 1500 mM concentrations were selected as optimal and minimal performance limits for PHM11. To know, how salt stress affects the expression profiles of regulatory genes of its key metabolic pathways, and total production of important metabolites; biomass, carotenoids, beta-carotene production, IAA and proline contents, and expression profiles of key genes affecting the protein folding, structural adaptations, transportation across the cell membrane, stress tolerance, carotenoids, IAA and mannitol production in PHM11 were studied under 100 and 1500 mM salinity. E. profundum PHM11 showed maximum and minimum growth, biomass and metabolite production at 100 and 1500 mM salinity respectively. Salt-induced fine-tuning of expression profiles of key genes of stress pathways was determined in halotolerant bacterium PHM11.

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“…There is a need to develop and promote environment-friendly strategies to cope with drought stress. Inoculation of plant growth-promoting rhizobacteria (PGPR) in the rhizosphere of crops is one of the most suitable strategies in agriculture [4]. The PGPR is a group of beneficial soil bacteria that not only improve the growth of the plants but also enhance drought tolerance in plants [5].…”

Section: Introductionmentioning

confidence: 99%

Exopolysaccharides Producing Bacteria for the Amelioration of Drought Stress in Wheat

et al. 2020

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This research was designed to elucidate the role of exopolysaccharides (EPS) producing bacterial strains for the amelioration of drought stress in wheat. Bacterial strains were isolated from a farmer’s field in the arid region of Pakistan. Out of 24 isolated stains, two bacterial strains, Bacillus subtilis (Accession No. MT742976) and Azospirillum brasilense (Accession No. MT742977) were selected, based on their ability to produce EPS and withstand drought stress. Both bacterial strains produced a good amount of EPS and osmolytes and exhibited drought tolerance individually, however, a combination of these strains produced higher amounts of EPS (sugar 6976 µg/g, 731.5 µg/g protein, and 1.1 mg/g uronic acid) and osmolytes (proline 4.4 µg/mg and sugar 79 µg/mg) and significantly changed the level of stress-induced phytohormones (61%, 49% and 30% decrease in Indole Acetic Acid (IAA), Gibberellic Acid (GA), and Cytokinin (CK)) respectively under stress, but an increase of 27.3% in Abscisic acid (ABA) concentration was observed. When inoculated, the combination of these strains improved seed germination, seedling vigor index, and promptness index by 18.2%, 23.7%, and 61.5% respectively under osmotic stress (20% polyethylene glycol, PEG6000). They also promoted plant growth in a pot experiment with an increase of 42.9%, 29.8%, and 33.7% in shoot length, root length, and leaf area, respectively. Physiological attributes of plants were also improved by bacterial inoculation showing an increase of 39.8%, 61.5%, and 45% in chlorophyll a, chlorophyll b, and carotenoid content respectively, as compared to control. Inoculations of bacterial strains also increased the production of osmolytes such asproline, amino acid, sugar, and protein by 30%, 23%, 68%, and 21.7% respectively. Co-inoculation of these strains enhanced the production of antioxidant enzymes such as superoxide dismutase (SOD) by 35.1%, catalase (CAT) by 77.4%, and peroxidase (POD) by 40.7%. Findings of the present research demonstrated that EPS, osmolyte, stress hormones, and antioxidant enzyme-producing bacterial strains impart drought tolerance in wheat and improve its growth, morphological attributes, physiological parameters, osmolytes production, and increase antioxidant enzymes.

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Modulation of proline metabolic gene expression in Arabidopsis thaliana under water-stressed conditions by a drought-mitigating Pseudomonas putida strain

Cited by 58 publications

References 59 publications

Amelioration of short‐term drought stress during different growth stages in Brassica juncea by rhizobacteria mediated maintenance of ROS homeostasis

Amelioration of short‐term drought stress during different growth stages in Brassica juncea by rhizobacteria mediated maintenance of ROS homeostasis

Halotolerant Exiguobacterium profundum PHM11 Tolerate Salinity by Accumulating L-Proline and Fine-Tuning Gene Expression Profiles of Related Metabolic Pathways

Exopolysaccharides Producing Bacteria for the Amelioration of Drought Stress in Wheat

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