In:
Phytopathology®, Scientific Societies, Vol. 108, No. 8 ( 2018-08), p. 957-963
Abstract:
Fusarium oxysporum f. sp. dianthi virus 1 (FodV1) was detected in isolate 116 (116V + ) of Fusarium oxysporum f. sp. dianthi, reaching such a high accumulation level that it was clearly visible after agarose gel electrophoresis of total DNA extracts. FodV1 consists of four double-stranded RNA segments that correspond to a new mycovirus in the Chrysoviridae family. We obtained an isolate of F. oxysporum f. sp. dianthi 116 (116V − ) with only a residual level of FodV1 RNA accumulation by single-conidia selection. Compared with 116V − , isolate 116V + showed significant phenotypic alterations in vegetative growth and virulence. Thus, the presence of a high titer of mycovirus FodV1 was associated with a modified morphology and a reduced growth of the colonies on solid medium, and with a diminished conidiation in liquid medium. Inoculation of four susceptible carnation cultivars with either 116V − or 116V + showed that the presence of a high titer of FodV1 was also correlated with a significantly reduced virulence of its fungal host. All of the results suggest that FodV1 could be associated with hypovirulence, identifying it as a potential biocontrol agent for Fusarium wilt of carnation. This is the first report of a mycovirus potentially associated with the induction of hypovirulence in the species F. oxysporum.
Type of Medium:
Online Resource
ISSN:
0031-949X
,
1943-7684
DOI:
10.1094/PHYTO-06-17-0200-R
Language:
English
Publisher:
Scientific Societies
Publication Date:
2018
detail.hit.zdb_id:
2037027-1
SSG:
12
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