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β-Glucan and its nanocomposites in sustainable agriculture and environment: an overview of mechanisms and applications

  • Nano-bioremediation Approaches for Sustainable Agriculture
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Abstract

β-Glucan is an eco-friendly, biodegradable, and economical biopolymer with important roles for acquiring adaptations to mitigate climate change in crop plants. β-Glucan plays a crucial role in the activation of functional plant innate immune system by triggering the downward signaling cascade/s, resulting in the accumulation of different pathogenesis-related proteins (PR-proteins), reactive oxygen species (ROS), antioxidant defense enzymes, Ca2+-influx as well as activation of mitogen-activated protein kinase (MAPK) pathway. Recent experimental studies have shown that β-glucan recognition is mediated by co-receptor LysMPRR (lysin motif pattern recognition receptor)-CERK1 (chitin elicitor receptor kinase 1), LYK4, and LYK5 (LysM-containing receptor-like kinase), as well as different receptor systems in plants that could be plant species-specific and/or age and/or tissue-dependent. Transgenic overexpression of β-glucanase, chitinase, and/or in combination with other PR-proteins like cationic peroxidase, AP24,thaumatin-likeprotein 1 (TLP-1) has also been achieved for improving plant disease resistance in crop plants, but the transgenic methods have some ethical and environmental concerns. In this regard, elicitation of plant immunity using biopolymer like β-glucan and chitosan offers an economical, safe, and publicly acceptable method. The β-glucan and chitosan nanocomposites have proven to be useful for the activation of plant defense pathways and to enhance plant response/systemic acquired resistance (SAR) against broad types of plant pathogens and mitigating multiple stresses under the changing climate conditions.

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Acknowledgements

 Authors are thankful to Directed General, Vasantdada Sugar Institute (VSI), Manjari (Bk) 412307, Pune, for all the support.

Funding

This work was supported by Vasantdada Sugar Institute (VSI), Manjari (Bk) 412307, Pune, and funded by University Grants Commission (UGC), New Delhi–110002.

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Both CSN and SGD conceptualized, contributed equally, and wrote the manuscript SGD suggested improvments in manuscript. PS did overall editing and finalizing the manuscript for submission.

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Correspondence to Sunil Govind Dalvi.

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The authors declare no competing interests.

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Responsible Editor: Gangrong Shi

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Chavanke, S., Penna, S. & Dalvi, S.G. β-Glucan and its nanocomposites in sustainable agriculture and environment: an overview of mechanisms and applications. Environ Sci Pollut Res 29, 80062–80087 (2022). https://doi.org/10.1007/s11356-022-20938-z

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  • DOI: https://doi.org/10.1007/s11356-022-20938-z

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