Leveraging Psychrophilic PGPR Strains for Enhanced Wheat Growth: A Sustainable Biofertilizer Approach
DOI:
https://doi.org/10.48047/HM.10.2.2024.1450-1466Keywords:
Psychrophilic PGPR, Wheat Growth, Biofertilizers, Sustainable Agriculture, Cold EnvironmentsAbstract
Psychrophilic Plant Growth-Promoting Rhizobacteria (PGPR) play a crucial role in enhancing sustainable wheat production in cold environments by promoting plant growth through various mechanisms and serving as effective biofertilizers. These bacteria can tolerate a wide range of temperatures, from as low as -8°C to as high as 36°C, making them well-suited for cold climates. (1). They enhance plant growth by solubilizing essential nutrients like phosphorus and zinc, even at low temperatures, and producing phytohormones such as indole-3-acetic acid that stimulate root elongation (1,2). Some psychrophilic PGPR can also fix atmospheric nitrogen, providing an additional source of nutrients for plants (1). Additionally, these bacteria induce stress tolerance mechanisms in plants, enabling them to better withstand cold stress by activating protective genes and producing antifreeze proteins (3). Studies have shown that the application of psychrophilic PGPR, either as individual strains or as consortia, can significantly reduce the need for synthetic fertilizers without compromising wheat yield and quality (2). When applied with half the recommended dose of fertilizers, these bacteria can maximize crop parameters and yield, providing a sustainable approach to wheat production in cold regions (2). The use of psychrophilic PGPR as biofertilizers has been found effective in yield optimization under temperature-stressed conditions, making them a promising solution for addressing food security concerns in the face of climate change (3). By improving nutrient availability, plant growth, and stress tolerance, psychrophilic PGPR contribute to the development of eco-friendly and resilient agricultural practices in cold environments.
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