Please use this identifier to cite or link to this item: http://hdl.handle.net/10995/111809
Title: Plant Growth Promoting Bacteria Improve Growth and Phytostabilization Potential of Zea Mays under Chromium and Drought Stress by Altering Photosynthetic and Antioxidant Responses
Authors: Vishnupradeep, R.
Bruno, L. B.
Taj, Z.
Karthik, C.
Challabathula, D.
Tripti
Kumar, A.
Freitas, H.
Rajkumar, M.
Issue Date: 2022
Publisher: Elsevier B.V.
Elsevier BV
Citation: Plant Growth Promoting Bacteria Improve Growth and Phytostabilization Potential of Zea Mays under Chromium and Drought Stress by Altering Photosynthetic and Antioxidant Responses / R. Vishnupradeep, L. B. Bruno, Z. Taj et al. // Environmental Technology and Innovation. — 2022. — Vol. 25. — 102154.
Abstract: Drought in heavy metal polluted arid and semiarid regions severely inhibits the plant growth and phytoremediation potential by affecting photosynthesis, antioxidant defense mechanism, and other biochemical processes. In the present study, we explored the role of plant growth-promoting bacteria (PGPB) on Zea mays growth and phytoremediation efficiency in Chromium (Cr) contaminated soils under drought stress by assessing plant stress tolerance, photosynthetic gas exchange activities, chlorophyll fluorescence, and Cr accumulation. Two efficient Cr and drought resistant PGPB with the potential to reduce Cr(VI) to Cr(III) and produce plant growth-promoting metabolites even under Cr, drought, or Cr+drought stress conditions were isolated and identified as Providencia sp. (TCR05) and Proteus mirabilis (TCR20). In pot experiments, the inoculation of TCR05 and TCR20 increased the plant growth, pigments, protein, phenolics, and relative water content and decreased the lipid peroxidation, proline, and superoxide dismutase activity under Cr, drought, or Cr+drought conditions. Irrespective of stress treatment, TCR05 and TCR20 also improved plant photosynthetic efficiency by increasing the CO2 assimilation rate, stomatal conductance to water vapor, transpiration rate, maximum quantum efficiency of PSII, actual quantum efficiency of PSII, electron transport rate, photochemical quenching, reducing the internal CO2 concentration and non-photochemical quenching. Besides, the PGPB decreased the translocation of Cr through immobilization of Cr in root. These results denoted that strains TCR05 and TCR20 could be a capable bio-inoculant for improving plant growth and phytostabilization practices in Cr contaminated sites even under water-limited conditions. © 2021 The Authors.
Keywords: BIO-INOCULANT
CHROMIUM
DROUGHT
PHOTOSYNTHESIS
PHYTOSTABILIZATION
PLANT GROWTH PROMOTING BACTERIA
ANTIOXIDANTS
ARID REGIONS
BACTERIA
BIOREMEDIATION
CARBON DIOXIDE
DROUGHT
EFFICIENCY
ELECTRON TRANSPORT PROPERTIES
ENZYMES
HEAVY METALS
PLANTS (BOTANY)
QUANTUM CHEMISTRY
QUANTUM EFFICIENCY
QUENCHING
SOIL POLLUTION
ANTI-OXIDANT RESPONSE
ARID AND SEMI-ARID REGIONS
BIO-INOCULANTS
DROUGHT STRESS
GROWTH POTENTIAL
PHOTOSYNTHETIC RESPONSE
PHYTOSTABILIZATION
PLANT GROWTH
PLANT GROWTH PROMOTING BACTERIUM
ZEA MAYS
PHOTOSYNTHESIS
URI: http://hdl.handle.net/10995/111809
Access: info:eu-repo/semantics/openAccess
SCOPUS ID: 85120966097
PURE ID: 29141974
ISSN: 2352-1864
metadata.dc.description.sponsorship: North Carolina Central University, NCCU; Department of Science and Technology, Ministry of Science and Technology, India, डीएसटी: INT/RUS/RFBR/363; Science and Engineering Research Board, SERB; Russian Foundation for Basic Research, РФФИ: L.B.B thankful to the Science and Engineering Research Board (SERB), India for providing National Post-Doctoral Fellowship (Grant No. PDF/2017/001074 ). A.K., T, and M.R. are grateful for the “ Department of Science and Technology (DST), India (Project No. INT/RUS/RFBR/363 ) and Russian Foundation for Basic Research, Russia (Project No. 19-516-45006) bilateral research grant”. A.K. acknowledge the work support by Russian Science Foundation (Project No. 21-76-00011). Many thanks to Benedict Analin from the Department of Life Sciences, Central University of Tamil Nadu for helping to analyze photosynthetic parameters in the laboratory. The manuscript was written through the contributions of all authors.
RSCF project card: 21-76-00011
Appears in Collections:Научные публикации, проиндексированные в SCOPUS и WoS CC

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