Morphological characterization of the interaction between Diplocarpon rosae and various rose species

authored by

O. Blechert, T. Debener

Abstract

Blackspot, caused by Diplocarpon rosae, is the most severe and ubiquitous disease of garden roses, but information is lacking about genotype-specific forms of resistance and susceptibility of the host. Macro- and microscopic analyses of 34 rose genotypes with a defined monoconidial culture black spot inoculum identified susceptible and resistant rose genotypes and further genotype-specific subdivisions, indicating the presence of partial forms of resistance and different resistance mechanisms. In total, eight interaction types were characterized, five representing compatible (types 1-5) and three representing incompatible interactions (types 6-8). The incompatible interactions were characterized by the lack of any visible fungal structures beneath the cuticle (type 8), single-cell necroses (type 7) or necroses of larger cell clusters (type 6), the latter two types with penetration hyphae and haustoria in epidermal cells.

Organisation(s)

Section Molecular Plant Breeding

External Organisation(s)

Julius Kühn Institute - Federal Research Centre for Cultivated Plants (JKI)

Type

Article

Journal

Plant pathology

Volume

54

Pages

82-90

No. of pages

9

ISSN

0032-0862

Publication date

02.2005

Publication status

Published

Peer reviewed

Yes

ASJC Scopus subject areas

Agronomy and Crop Science, Genetics, Plant Science, Horticulture

Electronic version(s)

https://doi.org/10.1111/j.1365-3059.2005.01118.x (Access: Open)