Didymella pomorum (Thüm.) Q. Chen & L. Cai, Studies

Wang, Yuchun, Tu, Yiyi, Chen, Xueling, Jiang, Hong, Ren, Hengze, Lu, Qinhua, Wei, Chaoling & Lv, Wuyun, 2024, Didymellaceae species associated with tea plant (Camellia sinensis) in China, MycoKeys 105, pp. 217-251 : 217-251

Didymella pomorum (Thüm.) Q. Chen & L. Cai, Studies in Mycology. 82: 179. 2015 a

Description.

see Boerema (1993).

Materials examined.

China, Yunnan Province, from diseased leaves of C. sinensis cv. Dalicha, 22 Jun 2019, Y. C. Wang, culture YCW 196 .

Notes.

Didymella pomorum was introduced as Phoma pomorum before the comprehensive revision of Didymellaceae ( Chen et al. 2015 a) . Chen et al. (2015 a) regarded four taxa of the respective Phoma pomorum varieties, viz. vars. circinata ( CBS 285.76), cyanea ( CBS 388.80) and pomorum ( CBS 539.66) and the species Ph. triticina ( CBS 354.52) to be conspecific and treated them as a single species D. pomorum . Pycnidia produced by this species are usually subglobose-ampulliform with a distinct ostiole ( Boerema 1993). It can cause leaf spots on many plants ( Boerema 1993; Romero et al. 2021). In the present study, one isolate from diseased tea plant leaves is closely related to D. sinensis with high statistical support (Fig. 2 ). This is the first report of D. pomorum isolated from C. sinensis .

Figures

Figure 2. Phylogenetic tree generated by Maximum Likelihood analysis, based on the combined ITS, LSU, RPB 2 and TUB 2 dataset of Didymella species. Bootstrap support values above 50 % and Bayesian posterior values above 0.75 are shown at each node (ML / PP). Pleiochaeta setosa CBS 118.25 / CBS 496.63 and Coniothyrium palmarum CBS 400.71 are used as outgroups. Ex-type strains are emphasised in bold.