Detection of Alternaria spp. in Carrot Seeds and Effect of the Fungi on SeedGermination and Seedling Growth of Carrot

다국어 초록 (Multilingual Abstract)

Five seed samples of carrot were tested to detect
Alternaria spp. by blotter method. A. alternata and A.
radicina were detected from all the seed samples as high
as 25.8-70.5% and 37.5-63.5%, respectively. A. dauci
was detected from four seed samples as low as 0.5-7.5%.
The three Alternaria spp. were detected from the
pericarp and the seed coat and endosperm of the carrot
seeds but not from the embryo by component plating
test. A. alternata and A. radicina were much more
detected from the pericarp than the seed coat and
endosperm. A. dauci was detected from the pericarp
and the seed coat and endosperm at similar rate. The
seed sample which was most severely infected with A.
radicina showed the lowest rate of germination in the
test on top of paper (TP). In the TP test, differences in
total infection rate of A. radicina and A. dauci of the
seed samples were very closely correlated with those in
incidence of seedling rot on the seed samples. However,
there was no correlation between infection rate of A.
alternata and rate of germination or seedling rot of the
seed samples. Soil test for seedling growth revealed that
there was no correlation between differences in total
infection rate of A. radicina and A. dauci and those in
rate of normal seedlings of the seed samples.

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