Cystotheca wrightii

Cystotheca wrightii
Scientific classification
Kingdom:	Fungi
Division:	Ascomycota
Class:	Leotiomycetes
Order:	Erysiphales
Family:	Erysiphaceae
Genus:	Cystotheca
Species:	C. wrightii
Binomial name
Cystotheca wrightii Berk. & M.A. Curtis, 1858

Cystothecawrightii is a species of powdery mildew in the family Erysiphaceae. It is found in Asia on species of Quercus subg. Cerris sect. Cyclobalanopsis. ^[1]

Description

The fungus likely forms dense distorting patches on the leaves of its host, with brown mycelium on the leaf undersides. Cystothecawrightii, like most Erysiphaceae, is highly host-specific and only infects species in the genus Quercus . All currently available sequences of C. wrightii (from China, Japan, and Korea) have been retrieved from Q. glauca as host. ^[1]

Taxonomy

The fungus was formally described in 1858 by Berkeley and M.A. Curtis. C. wrightii is the type species for the genus Cystotheca . As well as Quercus subg. Cerris sect. Cyclobalanopsis, C. wrightii has also been reported from Quercus subg. Quercus sect. Quercus, ^[2] and Castanopsis , ^[3] although both records are doubtful. ^[1]

References

1. Bradshaw, Michael; Braun, Uwe; Quijada, Luis; Coombes, Allen J.; Contreras-Paredes, Carlos; Pfister, Donald H. (2023-05-04). "Phylogeny and taxonomy of the genera of Erysiphaceae, part 3: Cystotheca". Mycologia. 115 (3): 427–436. doi:10.1080/00275514.2023.2194172. ISSN   0027-5514. PMID   37159342.
2. La, Y. J.; Lee, S. K.; Shin, C. H.; Cho, S. E.; Shin, H. D. (2014). "First Report of Powdery Mildew Caused by Cystotheca wrightii on Quercus glauca in Korea". Plant Disease. 98 (6): 850–850. doi:10.1094/PDIS-10-13-1071-PDN. ISSN   0191-2917.
3. Braun, Uwe; Cook, Roger T. A. (2012). Taxonomic manual of the Erysiphales (powdery mildews). CBS biodiversity series. Utrecht: CBS-KNAW fungal biodiversity centre. ISBN   978-90-70351-89-2.