Arbuscular Mycorrhizal (Glomus Fasciculatum) Fungi as a Plant Immunity Booster against Fungal Pathogen

Siddharam Math¹, Sagar Arya^2,3, Hiralal Sonawane^1*, Vilas Patil⁴, Manohar Chaskar¹

¹Prof. Ramkrishna More College of Arts, Commerce and Science, Akurdi, Pune, India.

²Center for Innovation Research and Consultancy, Pune, India.

³TERI-Deakin Nano Biotechnology Centre, Gurgaon, Haryana, India.

⁴Dr. B.N. Purandare Arts and Smt. S.G. Gupta Commerce and Science College, Lonavala, Pune, India.

Corresponding Author Email: amolsbr@gmail.com

DOI : http://dx.doi.org/10.12944/CARJ.7.1.12

Abstract:

Reactive Oxygen Species (ROS) mediated immune response in tomato (Solanum lycopersicum) plants inoculated with arbuscular mycorrhizal fungi (AMF) Glomus fasciculatum (GF) was studied in the presence of plant pathogenic fungi Fusarium oxysporum f. sp. lycopersici (FOL). Our aim was to assess how symbiosis of AMF potentiates ROS immune response system to deal pathogen mediated biotic stress. Tomato plant was inoculated with GF, FOL and GF + FOL in separate experimental sets to examine its effect on plants ROS machinery and the time taken to alleviate biotic stress. The antioxidant response was evaluated and correlated with the time provided by GF treated plants against FOL to initiate their second line of defenses as compared to only FOL treated ones. The establishment of symbiosis and development showed a positive effect on plant ROS response system and subsequently its growth. No significant difference was seen in the root mass of only GF, FOL and GF + FOL. The increase in activities of superoxide dismutase, catalase and peroxidase was similar in all the control and treated plants however; reduction in activities of these ROS scavengers was much faster in GF supplemented plants. Similar trend was also observed for ROS radicals possibly due to the involvement of antioxidant enzymes. LC-MS analysis of FOL was performed to co-relate the effect of some dominant compounds with its pathogenicity. Therefore, our results showcase AMF-GF’s ability to alleviate the oxidative damage generated by biotic stress and highlights on the buffer time taken by plants defense machinery to immunize itself at various levels.

Abbreviations: Reactive Oxygen Species (ROS), Arbuscular mycorrhizal fungi (AMF), Glomus fasciculatum (GF), Fusarium oxysporum f. sp. lycopersici (FOL)

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Keywords:

Antioxidant Enzymes; Arbuscular Mycorrhizal Fungi; Fusarium Oxysporum. Glomus Fasciculatum; Reactive Oxygen Species; Tomato Plant

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