Plant Growth Promotion of Vigna unguiculata in Arid Sandy Soil Using Bacterial Species from Coastal Sand Dune

Shet, Sulochana A; Garg, Suresh

doi:10.1007/s40003-022-00613-y

Cited by 6 publications

(2 citation statements)

References 35 publications

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“…The presence of signs of PGPR, including the synthesis of the phytohormone IAA, the dissolution of phosphates, the synthesis of ACC deaminase, in members of Chitinophaga spp. has also been described previously [ 63 , 64 ].…”

Section: Discussionmentioning

confidence: 99%

Effect of Heavy-Metal-Resistant PGPR Inoculants on Growth, Rhizosphere Microbiome and Remediation Potential of Miscanthus × giganteus in Zinc-Contaminated Soil

et al. 2023

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Microbial-assisted phytoremediation is considered a more effective approach to soil rehabilitation than the sole use of plants. Mycolicibacterium sp. Pb113 and Chitinophaga sp. Zn19, heavy-metal-resistant PGPR strains originally isolated from the rhizosphere of Miscanthus × giganteus, were used as inoculants of the host plant grown in control and zinc-contaminated (1650 mg/kg) soil in a 4-month pot experiment. The diversity and taxonomic structure of the rhizosphere microbiomes, assessed with metagenomic analysis of rhizosphere samples for the 16S rRNA gene, were studied. Principal coordinate analysis showed differences in the formation of the microbiomes, which was affected by zinc rather than by the inoculants. Bacterial taxa affected by zinc and the inoculants, and the taxa potentially involved in the promotion of plant growth as well as in assisted phytoremediation, were identified. Both inoculants promoted miscanthus growth, but only Chitinophaga sp. Zn19 contributed to significant Zn accumulation in the aboveground part of the plant. In this study, the positive effect of miscanthus inoculation with Mycolicibacterium spp. and Chitinophaga spp. was demonstrated for the first time. On the basis of our data, the bacterial strains studied may be recommended to improve the efficiency of M. × giganteus phytoremediation of zinc-contaminated soil.

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Section: Discussionmentioning

confidence: 99%

Effect of Heavy-Metal-Resistant PGPR Inoculants on Growth, Rhizosphere Microbiome and Remediation Potential of Miscanthus × giganteus in Zinc-Contaminated Soil

et al. 2023

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“…Although cowpeas are considered drought-tolerant, water de cits during the early vegetative stages can negatively affect their morphological and physiological traits, ultimately affecting biological nitrogen xation (BNF) and grain yield (Munjonji et al 2018;Ayalew and Yoseph 2022;Lumactud et al 2022).Plant growth-promoting rhizobacteria (PGPR) offer a promising biotechnological approach for mitigating the effects of abiotic stress on various crops (Bittencourt et al 2023;Cao et al 2023). Microbial communities sourced from speci c environments, such as semi-arid regions, adapted to drought conditions, may exhibit enhanced effectiveness in assisting plants to cope with water de cits (Shirinbayan et al 2019;Shet and Garg 2022;Braga et al 2022). The genus Microvirga belongs to the Methylobacteriaceae family and comprises bacteria that have been isolated from several environments, including arid and desert soils (Veyisoglu et al 2016;Du et al 2022), as well as the root nodules of different legume host plants (Ardley et al 2012;Msaddak et al 2019;Mouad et al 2020).…”

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confidence: 99%

Ability of nitrogen-fixing bacteria to alleviate drought stress in cowpea varies depending on the origin of the inoculated strain

Correa,

Pacheco,

Viana

et al. 2023

Preprint

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Background and Aims Drought is one of the main causes of global crop decline. Plant growth-promoting rhizobacteria enhance plant tolerance to adverse environmental conditions. This study aimed to determine whether the rhizobacteria Microvirga vignae (BR 3296 and BR 3299) and Bradyrhizobium sp. (BR 3301) can maintain cowpea growth under drought stress. Methods We analyzed biomass, nodulation, nitrogen accumulation, and physiological traits of the inoculated plants. Rhizobacterial strains were assessed for exopolysaccharide (EPS) and indole acetic acid (IAA) production, growth, and biofilm formation in a water-stress medium induced by polyethylene glycol (PEG)-6000. The expression of genes associated with abscisic acid (ABA) biosynthesis in root nodules was also investigated. Results All evaluated strains were grown in a culture medium supplemented with PEG. M. vignae strains exhibited increased biofilm formation and EPS production, while Bradyrhizobium showed high IAA production. Cowpea plants inoculated with Bradyrhizobium exhibit higher levels of nodulation, biomass, and nitrogen accumulation. Conversely, M. vignae strains were more efficient at alleviating drought stress and maintaining nodulation, biomass, nitrogen accumulation, and stomatal conductance similar to well-watered plants. Drought-inducible genes were more strongly upregulated in the nodules of plants inoculated with Bradyrhizobium than in those inoculated with M. vignae. Conclusion Our results suggest that M. vignae strains, isolated from a semi-arid region, help plants withstand water-stress, whereas the strain of Bradyrhizobium sp. isolated from a wet region did not effectively alleviate drought stress. However, Bradyrhizobium sp. conferred growth and nitrogen accumulation to cowpea superior to M. vignae and like plants supplied with nitrogen fertilizer.

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Plant-growth promotion by halotolerant black yeast Hortaea sp. strain PMGTC8 associated with salt crystals from solar saltern of Goa, India

Gaonkar,

Tamse,

Prabhu

et al. 2023

Arch Microbiol

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Plant Growth Promotion of Vigna unguiculata in Arid Sandy Soil Using Bacterial Species from Coastal Sand Dune

Cited by 6 publications

References 35 publications

Effect of Heavy-Metal-Resistant PGPR Inoculants on Growth, Rhizosphere Microbiome and Remediation Potential of Miscanthus × giganteus in Zinc-Contaminated Soil

Effect of Heavy-Metal-Resistant PGPR Inoculants on Growth, Rhizosphere Microbiome and Remediation Potential of Miscanthus × giganteus in Zinc-Contaminated Soil

Ability of nitrogen-fixing bacteria to alleviate drought stress in cowpea varies depending on the origin of the inoculated strain

Plant-growth promotion by halotolerant black yeast Hortaea sp. strain PMGTC8 associated with salt crystals from solar saltern of Goa, India

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