Alternaria vicatiae L. He & J. X. Deng, 2020

He, Lin, Liu, Hai Feng, Cui, Meng Jiao, Pei, Dong Fang, Du, Tao & Deng, Jian Xin, 2020, Alternaria vicatiae sp. nov. (Ascomycota: Pleosporaceae) Isolated from Vicatia thibetica in China, Phytotaxa 439 (3), pp. 255-264 : 260-262

Alternaria vicatiae L. He & J. X. Deng sp. nov. Fig. 2 B–E

MycoBank: 834478

Etymology:—In reference to the host genus, vicatia.

Descriptions:— Colonies on PDA buff to salmon, ochreous to sienna in reverse, velvety, 79‒82 mm in diam. After 7 days at 25 °C in darkness ( Fig. 2B ). On PCA: conidiophores straight or curved, smooth-walled, 45‒159 × 4‒7.5 μm with 2‒8 septa ( Fig. 2C ); conidia solitary, long-narrow ovoid or ellipsoid body, apex rounded, base narrow abruptly, 48‒94 × 12‒24 (‒34) μm in size, 5‒12 transverse septa; beak long-narrowed filiform, single commonly, 1-branched from beak rarely, 126‒350 × 2‒5 μm in size ( Fig. 2D‒E ). On V8A: conidiophores 34‒93 (‒125) × 4‒7.5 μm with 3‒7 septa; conidia solitary, long-ovoid body, 38‒89 × 12‒23 μm with 5‒11 transverse septa; beak filiform, most singly, sometime 1-branched, occasionally 2-branched, 129‒270 × 2.5‒5 μm in size.

Materials examined:— China, Gansu Province, Linxia Hui Autonomous Prefecture, Hezheng county, Hezheng Medicinal Botanical Garden of Gansu University of Chinese Medicine located in Gansu, from yellowish leaves with necrotic symptoms of Vicatia thibetica , 1 Jul. 2017, J.X. Deng. deposited by L. He, living cultures YZU 171341 and YZU 171342.

Notes:—The species produces conidia in small body with solitary or 1-branched beak, occationally 2-branched beak (only on V8A), which was easily could be differentiated from A. herbiculinae (larger conidial body) and A. saposhnikoviae (solitary beak) ( Table 2). It is distant from A. dauci and A. poonensis in the phylogenetic tree, but also obviously different in their morphology ( Table 2).

Figures

FIGURE 2. Morphological characteristics of Alternaria vicatiae. A: plant samples in field; B: colony on PDA for 7 days at 25℃; C: conidiophore; D: sporulation pattern; E: conidia. Scale bars =50 μm.