Fostering climate-resilient agriculture with ACC-deaminase producing rhizobacterial biostimulants from the cold deserts of the Indian Himalayas.

Autor: Gulati A; CSIR-Institute of Himalayan Bioresource Technology, Post Box 6, Palampur, 176 062, Himachal Pradesh, India. Electronic address: gal_arvind@yahoo.co.in., Thakur R; CSIR-Institute of Himalayan Bioresource Technology, Post Box 6, Palampur, 176 062, Himachal Pradesh, India; Menzies School of Health Research, Charles Darwin University, NT 0870, Australia., Vyas P; CSIR-Institute of Himalayan Bioresource Technology, Post Box 6, Palampur, 176 062, Himachal Pradesh, India; Department of Microbiology, Punjab Agricultural University, Ludhiana, 144 004, India., Sharma A; CSIR-Institute of Himalayan Bioresource Technology, Post Box 6, Palampur, 176 062, Himachal Pradesh, India; Regional Research Station, Punjab Agricultural University, Kapurthala, 144 601, India., Dhar H; CSIR-Institute of Himalayan Bioresource Technology, Post Box 6, Palampur, 176 062, Himachal Pradesh, India; Department of Microbiology, School of Biosciences, RIMT University, Mandi Gobindgarh, 147 301, Punjab, India., Pal M; CSIR-Institute of Himalayan Bioresource Technology, Post Box 6, Palampur, 176 062, Himachal Pradesh, India; Department of Biotechnology, Chandigarh Group of Colleges, Landran, Mohali- 140307, India., Thakur N; CSIR-Institute of Himalayan Bioresource Technology, Post Box 6, Palampur, 176 062, Himachal Pradesh, India., Kaushal K; CSIR-Institute of Himalayan Bioresource Technology, Post Box 6, Palampur, 176 062, Himachal Pradesh, India., Chawla A; CSIR-Institute of Himalayan Bioresource Technology, Post Box 6, Palampur, 176 062, Himachal Pradesh, India., Sharma KC; Krishi Vigyan Kendra, Himachal Pradesh Agriculture, Bajaura, 175 121, Himachal Pradesh, India., Chauhan PS; CSIR-National Botanical Research Institute, Rana Pratap Marg, Lucknow, 226 001, Uttar Pradesh, India., Nautiyal CS; CSIR-National Botanical Research Institute, Rana Pratap Marg, Lucknow, 226 001, Uttar Pradesh, India.
Jazyk: angličtina
Zdroj: Journal of environmental management [J Environ Manage] 2024 Dec; Vol. 371, pp. 123075. Date of Electronic Publication: 2024 Oct 30.
DOI: 10.1016/j.jenvman.2024.123075
Abstrakt: Climate change is one of the most significant threats to agricultural productivity, which necessitates a need for more resilient and sustainable farming practices. Rhizobacterial biostimulants that secrete 1-aminocyclopropane-1-carboxylate (ACC) deaminase and enhance crop resilience and yield can serve as a potential sustainable solution. The present study provides a comprehensive analysis of ACC-deaminase producing rhizobacteria (ACCD) isolated from cold deserts of the Indian trans-Himalayas and their efficacy to improve crop resilience and productivity under diverse climatic conditions. Thirty four efficient ACCD showed ACC deaminase activity ranging from 4.9 to 24484.3 nM α-ketobutyrate/h/mg/protein. These strains also exhibited broad-spectrum plant growth promotion (PGP) attributes, including tri-calcium phosphate (TCP) solubilization ranging from 2.4 to 687.5 μg/ml, siderophore production ranging from 62 to 224% and indole-3-acetic acid (IAA)-like auxin production ranging from 0.9 to 88.2 μg/ml. 16S rRNA gene sequencing of efficient strains showed their belonging to 10 genera, including Acinetobacter, Agrobacterium, Arthrobacter, Cellulomonas, Enterobacter, Microbacterium, Neomicrococcus, Priestia, Pseudomonas, and Rhizobium. Among these, Pseudomonas was the dominant genus with high ACC-deaminase activity and multiple PGP traits. These strains also showed growth under various stressed culture conditions, including acidity/alkalinity, different temperatures, desiccation, and salinity. Field applications of 4 efficient and stress-tolerant ACCD, including Pseudomonas geniculata, P. migulae, Priestia aryabhattai, and Rhizobium nepotum with reduced NPK dose under two different temperate climate conditions showed a significant improvement in growth and productivity of crops such as garlic, pea, potato, and wheat in slightly acidic soils and maize in saline-sodic alkaline soils. These findings indicated the broad-spectrum potential of these efficient and stress-tolerant ACCD strains to improve plant growth and productivity across diverse soil types and climatic conditions.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2024 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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