Abstract
During the past five years, molecular phylogenetic studies revealed a high level of genetic diversity within Pustula on Asteraceae, which warrants its division into more than a dozen distinct species. An important step towards introducing the phylogenetic lineages as new species is to clarify, whether morphological characteristics could satisfactorily distinguish between them, including previously described but not widely accepted species. In the present study, white blister rust specimens of Pustula parasitic to Austroeupatorium, Cirsium, Tragopogon (Asteraceae), Centaurium, and Swertia (Gentianaceae) were compared, based on morphological examinations. The characteristics of sporangia and oospores allowed the separation into five distinct species, which correspond well with recently discovered phylogenetic lineages and show specific host ranges. From the five host genera, Cystopus brasiliensis, Pustula spinulosa, P. obtusata (illeg. syn. P. tragopogonis), P. centaurii, and Albugo swertiae were identified, respectively, among which C. brasiliensis and A. swertiae were combined into the genus Pustula in the present study. Our results demonstrate that the Pustula species on Asteraceae, which were previously considered to be a single species, are indeed not only phylogenetically, but also morphologically distinct entities and that both sporangia and oospores are potentially suitable for morphological delimitation of closely related species of the genus Pustula.
| Original language | English |
|---|---|
| Pages (from-to) | 181-192 |
| Number of pages | 12 |
| Journal | Nova Hedwigia |
| Volume | 94 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 2012 Feb 1 |
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Keywords
- Albuginales
- Broad species concept
- Dimorphic sporangia
- Phylogeny
- Wall ornamentation
ASJC Scopus subject areas
- Plant Science
- Ecology, Evolution, Behavior and Systematics
Cite this
Morphological evidence supports the existence of multiple species in Pustula (Albuginaceae, Oomycota). / Choi, Young Joon; Thines, Marco; piatek, Marcin; Shin, Hyeon-Dong.
In: Nova Hedwigia, Vol. 94, No. 1, 01.02.2012, p. 181-192.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Morphological evidence supports the existence of multiple species in Pustula (Albuginaceae, Oomycota)
AU - Choi, Young Joon
AU - Thines, Marco
AU - piatek, Marcin
AU - Shin, Hyeon-Dong
PY - 2012/2/1
Y1 - 2012/2/1
N2 - During the past five years, molecular phylogenetic studies revealed a high level of genetic diversity within Pustula on Asteraceae, which warrants its division into more than a dozen distinct species. An important step towards introducing the phylogenetic lineages as new species is to clarify, whether morphological characteristics could satisfactorily distinguish between them, including previously described but not widely accepted species. In the present study, white blister rust specimens of Pustula parasitic to Austroeupatorium, Cirsium, Tragopogon (Asteraceae), Centaurium, and Swertia (Gentianaceae) were compared, based on morphological examinations. The characteristics of sporangia and oospores allowed the separation into five distinct species, which correspond well with recently discovered phylogenetic lineages and show specific host ranges. From the five host genera, Cystopus brasiliensis, Pustula spinulosa, P. obtusata (illeg. syn. P. tragopogonis), P. centaurii, and Albugo swertiae were identified, respectively, among which C. brasiliensis and A. swertiae were combined into the genus Pustula in the present study. Our results demonstrate that the Pustula species on Asteraceae, which were previously considered to be a single species, are indeed not only phylogenetically, but also morphologically distinct entities and that both sporangia and oospores are potentially suitable for morphological delimitation of closely related species of the genus Pustula.
AB - During the past five years, molecular phylogenetic studies revealed a high level of genetic diversity within Pustula on Asteraceae, which warrants its division into more than a dozen distinct species. An important step towards introducing the phylogenetic lineages as new species is to clarify, whether morphological characteristics could satisfactorily distinguish between them, including previously described but not widely accepted species. In the present study, white blister rust specimens of Pustula parasitic to Austroeupatorium, Cirsium, Tragopogon (Asteraceae), Centaurium, and Swertia (Gentianaceae) were compared, based on morphological examinations. The characteristics of sporangia and oospores allowed the separation into five distinct species, which correspond well with recently discovered phylogenetic lineages and show specific host ranges. From the five host genera, Cystopus brasiliensis, Pustula spinulosa, P. obtusata (illeg. syn. P. tragopogonis), P. centaurii, and Albugo swertiae were identified, respectively, among which C. brasiliensis and A. swertiae were combined into the genus Pustula in the present study. Our results demonstrate that the Pustula species on Asteraceae, which were previously considered to be a single species, are indeed not only phylogenetically, but also morphologically distinct entities and that both sporangia and oospores are potentially suitable for morphological delimitation of closely related species of the genus Pustula.
KW - Albuginales
KW - Broad species concept
KW - Dimorphic sporangia
KW - Phylogeny
KW - Wall ornamentation
UR - http://www.scopus.com/inward/record.url?scp=84859071929&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84859071929&partnerID=8YFLogxK
U2 - 10.1127/0029-5035/2012/0094-0181
DO - 10.1127/0029-5035/2012/0094-0181
M3 - Article
AN - SCOPUS:84859071929
VL - 94
SP - 181
EP - 192
JO - Nova Hedwigia
JF - Nova Hedwigia
SN - 0029-5035
IS - 1
ER -