Atlernaria glehniae J. X. Deng, 2019

Tao, Ya Qun, Jia, Guo Geng, Aung, Sein Lai Lai, Wu, Qing Li, Lu, Hong Xue & Deng, Jian Xin, 2019, Multigene phylogeny and morphology of Alternaria reveal a novel species and a new record in China, Phytotaxa 397 (2), pp. 169-176 : 172-173

Atlernaria glehniae J. X. Deng , sp. nov. Figs. 3 A–D

MycoBank MB 828996

Etymology:— glehniae refers to the host genus on which it was collected, Glehnia .

Descriptions:— Colonies on PDA white to vinaceous buff near edge, hazel and olivaceous in the center; salmon in reverse with a clear white edge ring; velvety, effuse, 70‒76 mm diam. after 7 days at 25 ºC. Conidiophores solitary or terminally erecting from hyphae, straight or slightly curved, pale brown to brown, commonly 10‒60 × 4‒6 μm with 1‒5 septa. Conidia 20‒40(‒48) × 10‒20 μm (x = 33.4 × 14.9 μm, n = 50) in size, solitary, occasionally 2 in a chain, most long ovoid and ellipsoid in shape, erostrate, light brown to dark brown, smooth walled, normally 3‒6 (sometimes up to 7 transverse septa), and 0‒2 longitudinal or oblique in a transverse segment.

Materials examined: — China, Shaanxi Province, Xianyang City, Yangling District, Plant Garden of Northwest A&F University, from leaf spot of Glehnia littoralis , 19 Jun. 2016, J.X. Deng, deposited by Q.Y. Tao, living cultures YZU 161146 and YZU 161149.

Notes:—The species is characterized by producing smaller conidia compared with those five species of sect. Radicina including A. carotiincultae , A. petroselini , A. radicina , A. selini and A. smyrnii ) ( Table 2). Besides, there is no apical conidiophore produced from its primary conidia (beakless) which character is different from A. carotiincultae , A. petroselini , A. selini and A. smyrnii . The species could be distinguished from A. radicina by producing a large population of long ellipsoid conidia and forming a larger colony on PDA. Phylogenetically, it could be easily identified based on ITS, EF-1α, RPB2 and ATPase genes.

Figures

FIGURE 3. Morphology of Alternaria glehniae YZU 161149 from Glehnia littoralis. A: colony on PDA. B, C: sporulations on PCA. D: conidia. Scale bars = 20 mm.