Halotolerant Pseudomonas koreensis S4T10 mitigate salt and drought stress in Arabidopsis thaliana.

Autor: Kalleku JN; Department of Food Security and Agricultural Development, Kyungpook National University, Republic of Korea.; Institute of International Research and Development, Kyungpook National University, Republic of Korea., Ihsan S; Department of Food Security and Agricultural Development, Kyungpook National University, Republic of Korea.; Institute of International Research and Development, Kyungpook National University, Republic of Korea., Al-Azzawi TNI; Department of Applied Biosciences, College of Agriculture and Life Sciences, Kyungpook National University, Republic of Korea., Khan M; Department of Applied Biosciences, College of Agriculture and Life Sciences, Kyungpook National University, Republic of Korea., Hussain A; Department of Applied Biosciences, College of Agriculture and Life Sciences, Kyungpook National University, Republic of Korea.; Department of Agriculture, Abdul Wali Khan University Mardan, Khyber Pakhtunkhwa, Pakistan., Chebitok F; Department of Applied Biosciences, College of Agriculture and Life Sciences, Kyungpook National University, Republic of Korea., Das AK; Department of Applied Biosciences, College of Agriculture and Life Sciences, Kyungpook National University, Republic of Korea., Moon YS; Department of Horticulture and Life Science, Yeungnam University, Republic of Korea., Mun BG; Department of Environmental and Biological Chemistry, Chungbuk National University, Cheongju, Republic of Korea., Lee IJ; Department of Applied Biosciences, College of Agriculture and Life Sciences, Kyungpook National University, Republic of Korea., Ali S; Department of Horticulture and Life Science, Yeungnam University, Republic of Korea., Yun BW; Department of Food Security and Agricultural Development, Kyungpook National University, Republic of Korea.; Institute of International Research and Development, Kyungpook National University, Republic of Korea.; Department of Applied Biosciences, College of Agriculture and Life Sciences, Kyungpook National University, Republic of Korea.
Jazyk: angličtina
Zdroj: Physiologia plantarum [Physiol Plant] 2024 Mar-Apr; Vol. 176 (2), pp. e14258.
DOI: 10.1111/ppl.14258
Abstrakt: Salt and drought are documented among the most detrimental and persistent abiotic stresses for crop production. Here, we investigated the impact of Pseudomonas koreensis strain S4T10 on plant performance under salt and drought stress. Arabidopsis thaliana Col-0 wild type and atnced3 mutant plants were inoculated with P. koreensis or tap water and exposed to NaCl (100 mM) for five days and drought stress by withholding water for seven days. P. koreensis significantly enhanced plant biomass and photosynthetic pigments under salt and drought stress conditions. Moreover, P. koreensis activated the antioxidant defence by modulating glutathione (GSH), superoxide dismutase (SOD), peroxidase (POD), and polyphenol oxidase (PPO) activities to scavenge the reactive oxygen species produced due to the stress. In addition, the application of P. koreensis upregulated the expression of genes associated with antioxidant responses, such as AtCAT1, AtCAT3, and AtSOD. Similarly, genes linked to salt stress, such as AtSOS1, AtSOS2, AtSOS3, AtNHX1, and AtHKT1, were also upregulated, affirming the positive role of P. koreensis S4T10 in streamlining the cellular influx and efflux transport systems during salt stress. Likewise, the PGPB inoculation was observed to regulate the expression of drought-responsive genes AtDREB2A, AtDREB2B, and ABA-responsive genes AtAO3, AtABA3 indicating that S4T10 enhanced drought tolerance via modulation of the ABA pathway. The results of this study affirm that P. koreensis S4T10 could be further developed as a biofertilizer to mitigate salt and drought stress at the same time.
(© 2024 The Authors. Physiologia Plantarum published by John Wiley & Sons Ltd on behalf of Scandinavian Plant Physiology Society.)
Databáze: MEDLINE
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