How the pgpr benefit plant under heat stress?
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Plant growth-promoting rhizobacteria (PGPR) offer significant benefits to plants under heat stress conditions. PGPR, such as Bacillus and Pseudomonas spp., have been shown to enhance plant heat tolerance by promoting growth and improving stress response mechanisms. These beneficial bacteria can upregulate heat shock proteins (HSP) in plants, such as small HSPs of 15 and 30kDa and large HSPs of 65 and 100kDa, aiding in stress mitigation . Additionally, PGPR enhance nutrient acquisition, nutrient use efficiency, and stimulate plant growth, resulting in improved physiological traits and increased grain yield under heat stress conditions . Furthermore, PGPR synthesize plant hormones like indoleacetic acid (IAA), which play a crucial role in plant growth and development, mediating plant tolerance to heat stress through various mechanisms like antioxidant enzyme activation and gene expression .
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| Papers (4) | Insight |
|---|---|
| PGPR like Bacillus sp. IHBT-705 benefit plants under heat stress by expressing heat-tolerant genes, promoting root growth, and enhancing stress tolerance, ultimately improving plant growth and development. | |
| PGPR, like Bacillus subtilis BE-L21, enhance plant heat tolerance by synthesizing plant hormones, activating antioxidant enzymes, gene expression, proline synthesis, and pigment accumulation, aiding in stress adaptation. | |
| PGPR consortium B3P enhances heat tolerance in maize by upregulating heat shock proteins, improving growth parameters, and increasing levels of catalase, peroxidase, chlorophyll, and carotenoids. | |
| PGPR bacteria alleviate heat stress in plants by enhancing nutrient acquisition, promoting growth, and increasing germination vigor, ultimately improving plant performance and grain yield. |
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