Dothistromin toxin is not required for dothistroma needle blight in Pinus radiata

Sammanfattning

The pine needle blight pathogen Dothistroma septosporum produces a polyketide toxin, dothistromin. This paper reports that loss of the ability to produce dothistromin did not affect the pathogenicity of D. septosporum to Pinus radiata in a laboratory-based pathogenicity test. However, dothistromin synthesis provided an advantage to the D. septosporum wild-type, compared to dothistromin-deficient mutants, in growth competition with other fungi in vitro. Other pine-needle inhabitants, such as the latent pathogen Cyclaneusma minus and the endophyte Lophodermium conigenum, were inhibited by dothistromin-producing D. septosporum. Therefore, it was concluded that dothistromin is not a pathogenicity factor, but that it may play a role in competition of D. septosporum with other fungi in its ecological niche.

Nyckelord

Dothistroma septosporum; green fluorescent protein; inter-fungal competition; Mycosphaerella pini; mycotoxin; red band needle blight

Publicerad i

Plant Pathology
2009, volym: 58, nummer: 2, sidor: 293-304

SLU författare

• Schwelm, Arne

  • Massey University

UKÄ forskningsämne

Botanik
Skogsvetenskap

Publikationens identifierare

• DOI: https://doi.org/10.1111/j.1365-3059.2008.01948.x

Permanent länk till denna sida (URI)

https://res.slu.se/id/publ/84708