Didymella coffeae-arabicae (M. M. Aveskamp et al.) Q. Chen et al.

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 coffeae-arabicae (M. M. Aveskamp et al.) Q. Chen et al. , Studies in Mycology. 82: 175. 2015 a

Description.

see Aveskamp et al. (2009).

Materials examined.

China, Yunnan Province, Puer City, Jingdong Yizu Autonomous County, from healthy leaves of C. sinensis cv. Longjing 43, 13 Jun 2020, Y. C. Wang, culture YCW 1972 .

Notes.

Didymella coffeae-arabicae was introduced as Phoma coffeae-arabicae before the comprehensive revision of Didymellaceae ( Chen et al. 2015 a) . The sexual morph of D. coffeae-arabicae was reported by Samaradiwakara et al. (2023). It forms pseudo-sclerotioid chlamydospores and is easily recognised by its conspicuously wide ostiole and is phylogenetically related to a group that mainly comprises Peyronellaea species forming alternarioid-botryoid chlamydospores ( Aveskamp et al. 2009). Didymella coffeae-arabicae caused leaf cankers of Castanea mollissima in China ( Jiang et al. 2021). In the present study, one isolate from healthy tea plant leaves grouped with D. coffeae-arabicae with high statistical support (Fig. 2 ). This is the first report of D. coffeae-arabicae 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.