Publications of NIPGR Scientists

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Subject: search.filters.subject.Serendipita indica

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    Arabidopsis SWEET12 contributes to the regulation of sugar allocation and defense responses during interaction with Serendipita indica
    (Oxford University Press, 2026) Jogawat, Abhimanyu; Sanyasi, Madhan; Menon, Sidhardh H; Goyal, Divya; Nair, Athira Mohandas; Vadassery, Jyothilakshmi
    Carbon availability is a central determinant of beneficial plant–fungal associations, and sugar transporters are key levers of this exchange. SWEETs (SUGARS WILL EVENTUALLY BE EXPORTED TRANSPORTER) are involved in transporting various kinds of sugars in plants; however, their functional roles in fungal symbiosis are not sufficiently explored. In this study, we investigate the functional relevance of Arabidopsis SWEETs in the interaction with endophytic fungi, Serendipita indica. Transcript profiling of SWEET genes in response to S. indica and its major elicitor, cellotriose, revealed early root-specific induction of SWEET12. Using a SWEET12 loss-of-function mutant, we demonstrate that the absence of SWEET12 disrupts the major outcomes of mutualism including growth promotion, balanced colonization, sugar allocation, and the accumulation of defense phytohormones (JA and SA). Transcriptome profiling further reveals that SWEET12 buffers whole-plant responses by coordinating genes linked to carbohydrate, nitrogen, and lipid metabolism, and by tuning defense signalling and nutrient transporter networks. Our findings indicate that SWEET12 is essential for balancing fungal colonization and host defense, thereby promoting plant growth. SWEET12 does so by acting as sugar valve that meters sugar release to the apoplast, enabling the fungus to access carbon while preserving host sugar homeostasis and immune competence.
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    Role of Serendipita indica in enhancing drought tolerance in crops
    (Elsevier B.V., 2021) Jangir, Pooja; Shekhawat, Pooja Kanwar; Bishnoi, Alka; Ram, Hasthi; Soni, Praveen
    The root endophytic fungus Serendipita indica (S. indica) acts as a bio-fertilizer, immuno-modulator, stress-buster and enhances plant growth, and protects the host plant from various biotic and abiotic stresses. Recent high-throughput omics approaches have helped in understanding the role of S. indica in host plants under stress conditions. The present review focuses on the mechanism of S. indica mediated drought-tolerance in crops by analyzing morphological, physiological, biochemical, and molecular processes. Interactions of S. indica with other plant growth-promoting microorganisms have been discussed. The knowledge gap and future prospects have been pointed out.
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    Serendipita indica: Harnessing its versatile potential for food and nutritional security
    (Elsevier B.V., 2021) Shekhawat, Pooja Kanwar; Jangir, Pooja; Bishnoi, Alka; Roy, Shweta; Ram, Hasthi; Soni, Praveen
    Quantity as well as quality of food is a major concern for increasing human population. Serendipita indica, a root endophytic fungus, has multifarious applications in agriculture. It increases nutrient and water uptake, carbon assimilation efficiency and stress-resistance which in turn enhances the growth and yield of plants. Moreover, it improves contents of minerals, fatty acids and essential oil, composition of oil, and fruit firmness in different plants. It also enhances the production of secondary metabolites having medicinal properties. This review highlights the role of Serendipita indica in increasing crop production and improving food quality. The underlying mechanism has also been illustrated.
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    Calcium channel CNGC19 mediates basal defense signaling to regulate colonization of Piriformospora indica in Arabidopsis roots
    (Oxford University Press, 2020) Jogawat, Abhimanyu; Meena, Mukesh Kumar; Kundu, Anish; Varma, Mahendra; Vadassery, Jyothilakshmi
    The activation of calcium signaling is a crucial event for perceiving environmental stress. Colonization by Piriformospora indica, a growth promoting root endosymbiont activates cytosolic Ca2+ in Arabidopsis roots. In this study, we analyze the role of calcium channels responsible for Ca2+ fluxes and its functional relevance. Expression profiling revealed that CNGC19 is a early activated gene, induced by unidentified components in P. indica cell wall extract. Functional analysis revealed that loss-of-function of CNGC19 results in growth inhibition by P.indica, due to increased colonization and loss of controlled P. indica growth. P. indica cell wall extract induced cytosolic Ca2+ elevation is reduced in cngc19 mutant indicating a role in generation of Ca2+cyt elevation. MAMP-trigerred immunity (MTI) is compromised in cngc19 lines as evident from unaltered callose deposition, reduced cis-OPDA, JA and JA-Ile levels and downregulation of jasmonate and other defense related genes which contributes to shift towards pathogenic response. Loss-of-function of CNGC19 results in inability to modulate indole glucosinolate content during P. indica-colonization. CNGC19 mediated basal immunity is AtPep receptor, PEPR dependent. CNGC19 is also crucial for P. indica mediated suppression of AtPep induced immunity. Thus, Arabidopsis CNGC19 is an important Ca2+ channel, maintaining a robust innate immunity and crucial for growth promotion signalling upon P. indica colonization.