Increase in cytotoxic lignans production after smut infection in sugar cane plants



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Sánchez Elordi, Elena and Sterling, Roberto M. and Santiago, Rocío and Armas, Roberto de and Vicente Córdoba, Carlos and Legaz González, María Estrella (2020) Increase in cytotoxic lignans production after smut infection in sugar cane plants. Journal of Plant Physiology, 244 (153087). pp. 1-13. ISSN 0176-1617, ESSN: 1618-1328

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Smut infection alters the transcription of dirigent proteins (DIR) by sugarcane plants. Here, we show that these alterations are associated to an elevated production of cytotoxic lignans. Smut-resistant sugarcane varieties display a fivefold increase in pinoresinol and also produce elevated amounts of secoisolariciresinol. Conversely, smut-sensitive varieties do not produce pinoresinol or secoisolariciresinol upon infection, synthesizing instead small amounts of matairesinol. Our data indicate that commercial pinoresinol and secoisolariciresinol seem to prevent smut teliospore germination and sporidia release from sprouted teliospores. Consistently, we observed abundant morphological alterations of sporidia incubated in the presence of these lignans. However, commercial lignans do not block the development of the pathogen in a definitive way. Additional experiments demonstrate that only the extracts from healthy or smut-exposed resistant plants inhibit sporidia growth in vitro, indicating that a specific mixture of lignans from resistant plants is necessary to constitute an effective defense mechanism.

Item Type:Article
Uncontrolled Keywords:Lignans; Sugar cane; Sugar cane glycoproteins; Sporidia; Sporisorium scitamineum
Subjects:Medical sciences > Biology > Botany
Medical sciences > Biology > Plant physiology
ID Code:59925
Deposited On:14 Apr 2020 09:54
Last Modified:14 Apr 2020 09:54

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