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  Jasmonic acid signaling mediates resistance of the wild tobacco Nicotiana attenuata to its native Fusarium, but not Alternaria, fungal pathogens

Luu, V. T., Schuck, S., Kim, S.-G., Weinhold, A., & Baldwin, I. T. (2015). Jasmonic acid signaling mediates resistance of the wild tobacco Nicotiana attenuata to its native Fusarium, but not Alternaria, fungal pathogens. Plant, Cell and Environment, 38(3), 572-584. doi:10.1111/pce.12416.

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 Urheber:
Luu, Van Thi1, 2, Autor           
Schuck, Stefan1, 2, Autor           
Kim, Sang-Gyu1, Autor           
Weinhold, Arne1, Autor           
Baldwin, Ian Thomas1, Autor           
Affiliations:
1Department of Molecular Ecology, Prof. I. T. Baldwin, MPI for Chemical Ecology, Max Planck Society, ou_24029              
2IMPRS on Ecological Interactions, MPI for Chemical Ecology, Max Planck Society, Jena, DE, ou_421900              

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 Zusammenfassung: We recently characterized a highly dynamic fungal disease outbreak in native populations of Nicotiana attenuata in the southwestern United States. Here, we explore how phytohormone signalling contributes to the observed disease dynamics. Single inoculation with three native Fusarium and Alternaria fungal pathogens, isolated from diseased plants growing in native populations, resulted in disease symptoms characteristic for each pathogen species. While Alternaria sp.‐infected plants displayed fewer symptoms and recovered, Fusarium spp.‐infected plants became chlorotic and frequently spontaneously wilted. Jasmonic acid (JA) and salicylic acid (SA) levels were differentially induced after Fusarium or Alternaria infection. Transgenic N. attenuata lines silenced in JA production or JA conjugation to isoleucine (JA‐Ile), but not in JA perception, were highly susceptible to infection by F. brachygibbosum Utah 4, indicating that products derived from the JA‐Ile biosynthetic pathway, but not their perception, is associated with increased Fusarium resistance. Infection assays using ov‐nahG plants which were silenced in pathogen‐induced SA accumulations revealed that SA may increase N. attenuata's resistance to Fusarium infection but not to Alternaria. Taken together, we propose that the dynamics of fungal disease symptoms among plants in native populations may be explained by a complex interplay of phytohormone responses to attack by multiple pathogens.

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 Datum: 20142014-08-272015-03
 Publikationsstatus: Erschienen
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 Identifikatoren: Anderer: ITB469
DOI: 10.1111/pce.12416
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Titel: Plant, Cell and Environment
Genre der Quelle: Zeitschrift
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Ort, Verlag, Ausgabe: Oxford, England : Blackwell Science
Seiten: - Band / Heft: 38 (3) Artikelnummer: - Start- / Endseite: 572 - 584 Identifikator: ISSN: 0140-7791
CoNE: https://pure.mpg.de/cone/journals/resource/954925471334