Cystotheca nanyuensis

Cystotheca nanyuensis
Scientific classification
Kingdom:	Fungi
Division:	Ascomycota
Class:	Leotiomycetes
Order:	Erysiphales
Family:	Erysiphaceae
Genus:	Cystotheca
Species:	C. nanyuensis
Binomial name
Cystotheca nanyuensis (J.L. Zhou) U. Braun, 2012
Synonyms
Cystotheca wrightii var. nanyuensisJ.L. Zhou, 1998

Cystothecananyuensis is a species of powdery mildew in the family Erysiphaceae. It is found in Asia on plants in the genus Quercus .

Description

Many Cystotheca species form dense, white or brown, distorting patches on the leaves of their hosts. Some species in this genus are also known to cause witch's-broom galls on their hosts. Cystothecananyuensis, like most Erysiphaceae, is highly host-specific and only infects species in the genus Quercus . It is currently only known from the type collection, on Quercus hypargyrea . ^[1]

Taxonomy

The fungus was formally described in 1998 by J.L. Zhou as a variety of C. wrightii with the basionym C. wrightii var. nanyuensis. The variety was elevated to species by Uwe Braun in 2012. ^[2] The type specimen was collected in China.

Host and Pathology

• Cystotheca nanyuensis is highly host-specific, currently known only from Quercus hypargyrea. Like other powdery mildew fungi, it forms dense white patches on leaf surfaces, which may lead to distortion or reduced photosynthetic capacity. The infection is superficial but can cause significant aesthetic damage. No economic impact has been documented, but its specificity suggests a co-evolutionary relationship with its host. ^{[1] [2]}

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. 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.