Warhorses in soil bioremediation: Seed biopriming with PGPF secretome to phytostimulate crop health under heavy metal stress

Nagaraja Geetha; Channarayapatna Ramesh Sunilkumar; Gurulingaiah Bhavya; Boregowda Nandini; Padukana Abhijith; Praveen Satapute; Hunthrike Shekar Shetty; Muthusamy Govarthanan; Sudisha Jogaiah

doi:10.1016/j.envres.2022.114498

Warhorses in soil bioremediation: Seed biopriming with PGPF secretome to phytostimulate crop health under heavy metal stress

Environ Res. 2023 Jan 1;216(Pt 1):114498. doi: 10.1016/j.envres.2022.114498. Epub 2022 Oct 7.

Authors

Nagaraja Geetha¹, Channarayapatna Ramesh Sunilkumar¹, Gurulingaiah Bhavya¹, Boregowda Nandini¹, Padukana Abhijith¹, Praveen Satapute², Hunthrike Shekar Shetty¹, Muthusamy Govarthanan³, Sudisha Jogaiah⁴

Affiliations

¹ Nanobiotechnology Laboratory, DOS in Biotechnology, University of Mysore, Manasagangotri, Mysuru, 570006, Karnataka, India.
² Laboratory of Plant Healthcare and Diagnostics, Department of Biotechnology and Microbiology, Karnatak University, Dharwad, 580 003, Karnataka, India.
³ Department of Environmental Engineering, Kyungpook National University, 80 Daehak-ro, Buk-gu, Daegu, 41566, South Korea; Department of Biomaterials, Saveetha Dental College and Hospital, Saveetha Institute of Medical and Technical Sciences, Chennai, 600 077, India. Electronic address: gova.muthu@gmail.com.
⁴ Laboratory of Plant Healthcare and Diagnostics, Department of Biotechnology and Microbiology, Karnatak University, Dharwad, 580 003, Karnataka, India; Department of Environmental Science, Central University of Kerala, Tejaswini Hills, Periye (PO) - 671316, Kasaragod (DT), Kerala, India. Electronic address: jsudish@kud.ac.in.

PMID: 36209791
DOI: 10.1016/j.envres.2022.114498

Abstract

The fungal symbiosis with the plant root system is importantly recognized as a plant growth promoting fungi (PGPFs), as well as elicitor of plant defence against different biotic and abiotic stress conditions. Thus PGPFs are playing as a key trouper in enhancing agricultural quality and increased crop production and paving a way towards a sustainable agriculture. Due to increased demand of food production, the over and unscientific usage of chemical fertilizers has led to the contamination of soil by organic and inorganic wastes impacting on soil quality, crops quality effecting on export business of agricultural products. The application of microbial based consortium like plant growth promoting fungi is gaining worldwide importance due to their multidimensional activity. These activities are through plant growth promotion, induction of systemic resistance, disease combating and detoxification of organic and inorganic toxic chemicals, a heavy metal tolerance ability. The master key behind these properties exhibited by PGPFs are attributed towards various secretory biomolecules (secondary metabolites or enzymes or metabolites) secreted by the fungi during interaction mechanism. The present review is focused on the multidimensional role PGPFs as elicitors of Induced systemic resistance against phytopathogens as well as heavy metal detoxifier through seed biopriming and biofortification methods. The in-sights on PGPFs and their probable mechanistic nature contributing towards plants to withstand heavy metal stress and stress alleviation by activating of various stress regulatory pathways leading to secretion of low molecular weight compounds like organic compounds, glomalin, hydrophobins, etc,. Thus projecting the importance of PGPFs and further requirement of research in developing PGPFs based molecules and combining with trending Nano technological approaches for enhanced heavy metal stress alleviations in plant and soil as well as establishing a sustainable agriculture.

Keywords: Biopriming; Fungal elicitor; Heavy metal stress; Induced systemic resistance; Low molecular weight compounds; Secretomes.

Publication types

Review

MeSH terms

Biodegradation, Environmental
Crops, Agricultural / metabolism
Fungi
Metals, Heavy* / toxicity
Secretome
Seeds / metabolism
Soil*

Substances

Soil
Metals, Heavy