Transcriptional Response and Plant Growth Promoting Activity of Pseudomonas fluorescens DR397 under Drought Stress Conditions

Nishu, Susmita Das; No, Jee Hyun; Lee, Tae Kwon

doi:10.1128/spectrum.00979-22

Cited by 19 publications

(13 citation statements)

References 48 publications

(69 reference statements)

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“…It is due to that Si plays a role in reducing the effect of stress on the plant, as previously mentioned. This agrees with (Melo et al, 2022 andNishu et al, 2022), who studied the role of rhizobia on plants under water stress conditions, they found that rhizobia has an effective role in the production of stress proteins to survive under harsh environments particularly drought.…”

Section: Fruits Biochemical Contentsupporting

confidence: 90%

“…As a result, they could also function as PGPR in non-nodulating plants. Antioxidants, catalase, osmolytes, stress proteins, and exopolysaccharides are most likely produced by rhizobia to survive under harsh environments particularly drought (Melo et al, 2022;Nishu et al, 2022 andUzma et al, 2022). However, rhizobia have been observed to survive under drought up to −1.25 MPa .…”

Section: Introductionmentioning

confidence: 99%

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Impact of Silicon and Some Rhizobial Species on Growth and Productivity of Tomato Under Different Irrigation Periods-North Sinai

Habib

Abdelaziz²,

Hagab³

et al. 2022

Egyptian Journal of Desert Research

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rrigation period is one of the significant factors affecting the growth, productivity, and yield of tomato plants. The study of increasing the period irrigation on tomato production is an important study of the effect of drought. The present investigation was carried out during the seasons of 2020/2021 in newly reclaimed arid land in the Agricultural Experimental Station of the Desert Research Center at Baloza Station, North Sinai Governorate (31° 32 03 N and 32° 362 03 E). The experimental results indicated that the increase in irrigation periods and foliar spraying foliar with silicon and microbial rhizobia in addition to the recommended doses of mineral fertilizers led to an increase in the yield of fresh and dry yield of tomato fruit and the nutrients content of leaves and fruits significantly increased. The average of tomato fruits accumulated in excess of biomass as total protein and total antioxidant content were increased by foliar spraying with silicon and also by inoculation of roots of the seedling by rhizobia. Proline content and water usage efficiency (WUE) in fruits were enhanced by various irrigation regimes. In comparison to the control, the irrigation water use efficiency (WUE) and proline content rose with the application of silicon and rhizobia but with less irrigation time. The microbial densities and activity under drought stress were boosted by the simultaneous application of silicon and rhizobia. It is notable that, soil dehydrogenase increased significantly with increasing irrigation period from 60 to 120 min, the highest mean values (1.031 μmol triphenyl formazan/g dry soil) were recorded at 120 min of field capacity of water requirement.

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Section: Fruits Biochemical Contentsupporting

confidence: 90%

Section: Introductionmentioning

confidence: 99%

Impact of Silicon and Some Rhizobial Species on Growth and Productivity of Tomato Under Different Irrigation Periods-North Sinai

Habib

Abdelaziz²,

Hagab³

et al. 2022

Egyptian Journal of Desert Research

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“…In fact, most papers about crops inoculated with other P. fluorescens strains (such as DR397, P22, Pseudomonas sp. Z6, and P. fluorescens biotype G) [ 35 , 36 , 47 ] identify an increase in shoot dry biomass 2–4 times lower than our findings, even if higher plant yields were obtained.…”

Section: Discussioncontrasting

confidence: 75%

“…Among these, Pseudomonas fluorescens complex Migula, 1895 are ubiquitous in rhizospheric microbiota [ 31 ] and tolerant to metals [ 32 , 33 ]. These bacterial strains were also able to increase crop yield (e.g., Solanum tuberosum L.) [ 34 ], growth parameters (e.g., Pisum sativum L., up to 45%; Phaseolus vulgaris L., up to 20%) [ 35 ], and shoot dry biomass (e.g., Eragrostis tef (Zucc) Trotter, up to 2.8-fold) [ 36 ].…”

Section: Introductionmentioning

confidence: 99%

Effects of Bacterial and Fungal Inocula on Biomass, Ecophysiology, and Uptake of Metals of Alyssoides utriculata (L.) Medik.

Priarone

Romeo

Piazza

et al. 2023

Plants

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The inoculation of plants with plant-growth-promoting microorganisms (PGPM) (i.e., bacterial and fungal strains) is an emerging approach that helps plants cope with abiotic and biotic stresses. However, knowledge regarding their synergic effects on plants growing in metal-rich soils is limited. Consequently, the aim of this study was to investigate the biomass, ecophysiology, and metal accumulation of the facultative Ni-hyperaccumulator Alyssoides utriculata (L.) Medik. inoculated with single or mixed plant-growth-promoting (PGP) bacterial strain Pseudomonas fluorescens Migula 1895 (SERP1) and PGP fungal strain Penicillium ochrochloron Biourge (SERP03 S) on native serpentine soil (n = 20 for each treatment). Photosynthetic efficiency (Fv/Fm) and performance indicators (PI) had the same trends with no significant differences among groups, with Fv/Fms > 1 and PI up to 12. However, the aboveground biomass increased 4–5-fold for single and mixed inoculated plants. The aboveground/belowground dry biomass ratio was higher for plants inoculated with fungi (30), mixed (21), and bacteria (17). The ICP-MS highlighted that single and mixed inocula were able to double the aboveground biomass’ P content. Mn metal accumulation significantly increased with both single and mixed PGP inocula, and Zn accumulation increased only with single PGP inocula, whereas Cu accumulation increased twofold only with mixed PGP inocula, but with a low content. Only Ni metal accumulation approached the hyperaccumulation level (Ni > 1000 mg/kg DW) with all treatments. This study demonstrated the ability of selected single and combined PGP strains to significantly increase plant biomass and plant tolerance of metals present in the substrate, resulting in a higher capacity for Ni accumulation in shoots.

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“…Some PGP microbes improve plant growth by solubilizing insoluble phosphates in the soil, particularly in phosphorus-deficient environments, thereby increasing phosphorus cycling and improving soil quality. Many bacterial strains, including Pseudomonas (Singh et al 2021 ; Asaf et al 2018 ; Saha et al 2022 ; Rikame and Borde 2022 ; Nishu et al 2022 ), Enterobacter (Guo et al 2020 ; Raturi et al 2022 ), and Serratia (Adam et al 2016 ), promote plant growth by improving nutrient availability. In the present study, we showed that an isolated strain ATSA2 T from surface-sterilized seeds produces a relatively high IAA content in the presence of l -tryptophan, with detectable siderophore and phosphate solubilization activity (Table 1 ).…”

Section: Discussionmentioning

confidence: 99%

Genome insights into the plant growth-promoting bacterium Saccharibacillus brassicae ATSA2T

et al. 2023

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Endophytes can facilitate the improvement of plant growth and health in agriculturally important crops, yet their genomes and secondary metabolites remain largely unexplored. We previously isolated Saccharibacillus brassicae strain ATSA2T from surface-sterilized seeds of kimchi cabbage and represented a novel species of the genus Saccharibacillus. In this study, we evaluated the plant growth-promoting (PGP) effect of strain ATSA2T in kimchi cabbage, bok choy, and pepper plants grown in soils. We found a significant effect on the shoot and root biomass, and chlorophyll contents following strain ATSA2T treatment. Strain ATSA2T displayed PGP traits such as indole acetic acid (IAA, 62.9 μg/mL) and siderophore production, and phosphate solubilization activity. Furthermore, genome analysis of this strain suggested the presence of gene clusters involved in iron acquisition (fhuABD, afuABC, fbpABC, and fepCDG) and phosphate solubilization (pstABCHS, phoABHLU, and phnCDEP) and other phytohormone biosynthesis genes, including indole-3-acetic acid (trpABCDEFG), in the genome. Interestingly, the secondary metabolites cerecidin, carotenoid, siderophore (staphylobactin), and bacillaene underlying plant growth promotion were found in the whole genome via antiSMASH analysis. Overall, physiological testing and genome analysis data provide comprehensive insights into plant growth-promoting mechanisms, suggesting the relevance of strain ATSA2T in agricultural biotechnology.

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Transcriptional Response and Plant Growth Promoting Activity of Pseudomonas fluorescens DR397 under Drought Stress Conditions

Abstract: Drought is a serious abiotic stress on plants as wells as the microbes that coexist with plants, which significantly lowers their fitness. The plant-bacterial interaction is an important strategy to enhance their fitness under drought.

Cited by 19 publications

References 48 publications

Impact of Silicon and Some Rhizobial Species on Growth and Productivity of Tomato Under Different Irrigation Periods-North Sinai

Impact of Silicon and Some Rhizobial Species on Growth and Productivity of Tomato Under Different Irrigation Periods-North Sinai

Effects of Bacterial and Fungal Inocula on Biomass, Ecophysiology, and Uptake of Metals of Alyssoides utriculata (L.) Medik.

Genome insights into the plant growth-promoting bacterium Saccharibacillus brassicae ATSA2T

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