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Vegetative compatibility grouping and pathogenicity of Colletotrichum gloeosporioides isolates from different host plants.
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 Authours
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Il-Pyung Ahn[0], Soonok Kim[0], Kyung-Hwan Im[1] and Yong-Hwan Lee[0][*] |
| Title |
Vegetative compatibility grouping and pathogenicity of Colletotrichum gloeosporioides isolates from different host plants. |
| Journal |
The Plant Pathology Journal, 2003 (19) ~ |
Abstract
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A total of 57 isolates of Colletotrichum gloeosporioides
were recovered from diseased tissues of Hall¡¯s crab
apple (Malus haliana), 3 cultivars of edible apple (M.
pumila var. dulcissima), red pepper (Capsicum annum),
and grapevine (Vitis vinifera) fruits. All isolates showed
strong virulence on their own host plants. Isolates from
edible apple exhibited high level of cultivar specificity in
pathogenicity tests. Ten isolates from apple cultivar
¡®Fuji¡¯ were virulent on ¡®Jonathan¡¯ and ¡®Rall¡¯s Genet¡¯.
However, 12 isolates from ¡®Jonathan¡¯ and ¡®Rall¡¯s Genet¡¯
were not virulent on ¡®Fuji¡¯. Among the 24 isolates from
red pepper, only seven and two isolates were infective on
edible apple and grapevine fruits, respectively. All six
isolates from grapevine were only virulent on their own
host. These isolates were grouped into five vegetative
compatibility groups (VCGs), A, B, C, D, and E, by
demonstrating heterokaryosis through complementation
using nitrate-nonutilizing (nit) mutants. Among them,
isolates belong to VCG-A and VCG-D accounted for 24
and 17 isolates; those in VCG-A exhibited wide host
range involving Hall¡¯s crab apple, all three edible apple
cultivars, and red pepper. On the other hand, isolates of
VCG-D and VCG-E showed limited host range specific
to red pepper and grapevine, respectively. Taken
together, the data suggest that among C. gloeosporioides
isolates, the concepts of pathotype and/or forma
specialis may exist, and that three is a relationship
between host specificity and VCG grouping among C.
gloeosporioides isolates. |
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