Plant growth-promoting rhizobacteria reduce adverse effects of salinity and osmotic stress by regulating phytohormones and antioxidants in Cucumis sativus

By Sang-mo Kang, Abdul Latif Khan, Muhammad Mohsin Waqas, Y. You, Jinho Kim, Jong-guk Kim, Muhammad Hamayun, In-Jung Lee. 2014

413 citations recorded by the source corpus.

We assessed the role of plant growth-promoting rhizobacteria (PGPR) strains viz. Burkholdera cepacia SE4, Promicromonospora sp. SE188 and Acinetobacter calcoaceticus SE370 in counteracting salinity and drought stress to cucumber plants. The control plants had stunted growth, while PGPR-treated plants had significantly higher biomass and chlorophyll contents under salinity and drought stress. The ameliorative effects of PGPR-application were also evidenced by the increased water potential and decreased electrolytic leakage. The PGPR-applied plants had reduced sodium ion concentration, while the potassium and phosphorus were abundantly present as compared to control under stress. Oxidative stress was mitigated by PGPR through reduced activities of catalase, peroxidase, polyphenol oxidase, and total polyphenol as compared to control. The control plants showed up-regulation of stress-responsive abscisic acid as compared to PGPR application, while salicylic acid and gibberellin 4 were significantly higher in PGPR. In conclusion, the PGPR application might be used in marginalized agricultural lands to increase crop productivity.

Subfields: Plant Science

View Paper: https://www.semanticscholar.org/paper/f9d6cbf328e99252e1e64ca1abcf2cc941f0cd01

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Citations in the corpus

Rhizobacterial-plant interactions: Strategies ensuring plant growth promotion under drought and salinity stress (2016, background): “It includes modulation of phytohormonal levels (Egamberdieva, 2012; Liu et al., 2013; Glick, 2014; Kang et al., 2014b; Belimov et al., 2015; Cohen et al., 2015) (Fig.”
Effect of biofilm forming plant growth promoting rhizobacteria on salinity tolerance in barley (2016, background): “These PGPRs stimulate plant growth and enhance plant biomass and their beneficial effects have been demonstrated in many agricultural crop species such as wheat, tobacco, Brassica juncea, tomatoes, bell peppers, cucumbers and barley as reviewed by Kang et al. (2014).”
The role of abiotic factors modulating the plant-microbe-soil interactions: toward sustainable agriculture. A review (2017, background): “, 2014), temperature (Alexandre & Oliveira, 2013), salinity (Kang et al., 2014), tolerance to heavy metals (Glick, 2014), and biocontrol pathogens (Martinez-Absalón et al.”
Mitigation of NaCl Stress in Wheat by Rhizosphere Engineering Using Salt Habitat Adapted PGPR Halotolerant Bacteria (2021, background): “Improvement by PGPRs of the chlorophyll content in many plants cultivated under abiotic stress conditions had been previously described [35,46].”
Rhizosphere engineering: Enhancing sustainable plant ecosystem productivity (2017, positive): “…assays Confers drought and salinity tolerance in inoculated plants by reducing catalase, peroxidase; and increasing salicylic acid and gibberellin (Kang et al., 2014a) Enterobacter sp. UPMR18 Okra RT-PCR Salt tolerance by increasing antioxidant activity and up regulation of ROS pathway genes…”