Didymella segeticola (Q. Chen) 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 segeticola (Q. Chen) Q. Chen et al. , Studies in Mycology. 87: 138. 2017

Description.

see Chen et al. (2015 b).

Materials examined.

China, Jiangsu Province, Yixing City, Zhangzhu Town , Furong Village , from diseased leaves of C. sinensis cv. Longjing 43, 19 Jun 2019, Y. C. Wang, culture YCW 109 . Zhejiang Province, Lishui City, from diseased leaves of C. sinensis cv. Baiye 1, 22 Jun 2019, Y. C. Wang, culture YCW 192 . Zhejiang Province, Hangzhou City, from diseased leaves of C. sinensis cv. Longjing 43, 6 Jun 2018, Y. C. Wang, culture YCW 1289 .

Notes.

Didymella segeticola was introduced as Phoma segeticola before the comprehensive revision of Didymellaceae ( Chen et al. 2015 a) . Under the current circumstance of Didymellaceae , it belongs to Didymella . Didymella segeticola can develop abundant aerial mycelium and black pycnidia on oatmeal agar ( OA) plates ( Chen et al. 2015 b). Zhao et al. (2018) first reported that D. segeticola can cause tea leaf spot in the tea plantations in Guizhou Province, which results in leaf fall and a huge loss of tea leaves. In the present study, 171 isolates from diseased tea plant leaves formed a monophyletic subclade, closely related to D. bellidis with high statistical support (Fig. 2 ).

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.