Abstract：
: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.
journal_name
J Plant Physioljournal_title
Journal of plant physiologyauthors
Sánchez-Elordi E,Sterling RM,Santiago R,de Armas R,Vicente C,Legaz MEdoi
10.1016/j.jplph.2019.153087subject
Has Abstractpub_date
2020-01-01 00:00:00pages
153087eissn
0176-1617issn
1618-1328pii
S0176-1617(19)30216-0journal_volume
244pub_type
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