2019年10月1日
The first approach to taxonomical and phylogenetic properties of grapevine leaf rust (GLR) fungi in Vietnam
Asian Mycological Congress 2019 (AMC 2019)
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- 開催年月日
- 2019年10月1日 - 2019年10月4日
- 記述言語
- 英語
- 会議種別
- ポスター発表
- 開催地
- Tsu, Mie,
Purpose: In Vietnam, Trinh et al. (2001) reported 40 species of rust fungi, followed by Kaneko et
al. (2007) reporting additional 13 species. Since the two publications, no systematic research has
been conducted. Therefore, building the rust fungus inventory in Vietnam is scanty. It is, thus, natural
consequence that rust fungi threating economically important crops, e.g., grapevines, coffee trees, and
so on, are largely unknown. Wine grape plantation has become popular in central Vietnam. Despite of
wide occurrence of grapevine leaf rusts (GLR), the causative agents of GLR have not been investigated.
We aimed to explore biological properties of the GLR fungi in Vietnam and to determine their taxonomical
and phylogenetic of status.
Methods: In 2017, uredinial stages were found on the leaves of cultivated grapevines in Vietnam Nat.
Univ. of Agriculture and surrounding areas. Four fungal specimens were examined in morphology and
molecular phylogeny.
Results and conclusions: The specimens were morphologically identified to Phakopsora. Urediniospores
were 13-23 X 8-17 μm in size. The spore wall was 0.8-1.9 μm thick. Peripheral paraphyses were 40-69
X 7-14 μm in size. The wall was 0.5-2.5 μm dorsally and 0.8-3.5 μm apically. In a phylogenetic analysis
using genomic rDNA ITS2 regions and LSU rDNA D1D2 regions, Vietnamese specimens were included in
the Thai GLR fungus population, which was phylogenetically separated from other Southeast Asian and
East Asian populations of GLR fungi. Further studies will reveal phylogenetic and taxonomic relationships
between Asian GLR fungus populations and their geographic distributions.
al. (2007) reporting additional 13 species. Since the two publications, no systematic research has
been conducted. Therefore, building the rust fungus inventory in Vietnam is scanty. It is, thus, natural
consequence that rust fungi threating economically important crops, e.g., grapevines, coffee trees, and
so on, are largely unknown. Wine grape plantation has become popular in central Vietnam. Despite of
wide occurrence of grapevine leaf rusts (GLR), the causative agents of GLR have not been investigated.
We aimed to explore biological properties of the GLR fungi in Vietnam and to determine their taxonomical
and phylogenetic of status.
Methods: In 2017, uredinial stages were found on the leaves of cultivated grapevines in Vietnam Nat.
Univ. of Agriculture and surrounding areas. Four fungal specimens were examined in morphology and
molecular phylogeny.
Results and conclusions: The specimens were morphologically identified to Phakopsora. Urediniospores
were 13-23 X 8-17 μm in size. The spore wall was 0.8-1.9 μm thick. Peripheral paraphyses were 40-69
X 7-14 μm in size. The wall was 0.5-2.5 μm dorsally and 0.8-3.5 μm apically. In a phylogenetic analysis
using genomic rDNA ITS2 regions and LSU rDNA D1D2 regions, Vietnamese specimens were included in
the Thai GLR fungus population, which was phylogenetically separated from other Southeast Asian and
East Asian populations of GLR fungi. Further studies will reveal phylogenetic and taxonomic relationships
between Asian GLR fungus populations and their geographic distributions.