Survival trade-offs in plant roots during colonization by closely related beneficial and pathogenic fungi

Stéphane Hacquard, Barbara Kracher, Kei Hiruma, Philipp C Münch, Ruben Garrido-Oter, Michael R Thon, Aaron Weimann, U. Damm, Jean-Félix Dallery, Matthieu Hainaut, Bernard Henrissat, Olivier Lespinet, Soledad Sacristán, Emiel Ver Loren van Themaat, Eric Kemen, Alice C McHardy, Paul Schulze-Lefert, Richard J O'Connell

    Research output: Contribution to journal/periodicalArticleScientificpeer-review

    183 Citations (Scopus)

    Abstract

    The sessile nature of plants forced them to evolve mechanisms to prioritize their responses to simultaneous stresses, including colonization by microbes or nutrient starvation. Here, we compare the genomes of a beneficial root endophyte, Colletotrichum tofieldiae and its pathogenic relative C. incanum, and examine the transcriptomes of both fungi and their plant host Arabidopsis during phosphate starvation. Although the two species diverged only 8.8 million years ago and have similar gene arsenals, we identify genomic signatures indicative of an evolutionary transition from pathogenic to beneficial lifestyles, including a narrowed repertoire of secreted effector proteins, expanded families of chitin-binding and secondary metabolism-related proteins, and limited activation of pathogenicity-related genes in planta. We show that beneficial responses are prioritized in C. tofieldiae-colonized roots under phosphate-deficient conditions, whereas defense responses are activated under phosphate-sufficient conditions. These immune responses are retained in phosphate-starved roots colonized by pathogenic C. incanum, illustrating the ability of plants to maximize survival in response to conflicting stresses.
    Original languageEnglish
    Article number11362
    Number of pages12
    JournalNature Communications
    Volume7
    DOIs
    Publication statusPublished - 06 May 2016

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