Alternaria vignae C. X. Huang & J. X. Deng, 2022

Huang, Cheng Xin, Liu, Feng Yin, Gou, Ya Nan, Deng, Jian Xin & Li, Mei Jia, 2022, Alternaria vignae sp. nov. (Ascomycota: Pleosporaceae) from Vigna unguiculata in China, Phytotaxa 556 (3), pp. 281-290 : 286-287

publication ID

https://doi.org/ 10.11646/phytotaxa.556.3.4

DOI

https://doi.org/10.5281/zenodo.6977079

persistent identifier

https://treatment.plazi.org/id/DA0F8E38-7253-6607-54A9-DBEAFB16FC97

treatment provided by

Plazi

scientific name

Alternaria vignae C. X. Huang & J. X. Deng
status

sp. nov.

Alternaria vignae C. X. Huang & J. X. Deng View in CoL sp. nov. Fig. 2b–j View FIGURE 2

MycoBank: 843124

Type— China, the Inner Mongolia Autonomous Region, Hohhot City , the farm of Inner Mongolia Agricultural University, from leaves of Vigna unguiculata , 20 Aug, 2017, J. X. Deng, YZU-H-009 (holotype), ex-type culture YZU 171714 About YZU .

Etymology:—In reference to the host genus name, Vigna unguiculata

Descriptions:— Colony on PDA, light yellow in the center, white at the edge, hyphae flocculent, sulfur yellow to pure yellow in reverse, 39-47 mm in diam. after 7 days at 25 °C in darkness ( Fig. 2b View FIGURE 2 ). Conidiophores smooth, straight or curved, 42-130 × 4-6 μm in size, with 2-9 transverse septa. Conidiogenous cells clavate, slightly enlarged at apex, 6-19 × 4-6 μm, sometimes branched to produce another conidium ( Fig. 2 View FIGURE 2 e-f). Conidia usually solitary or in a chain with two units ( Fig. 2 View FIGURE 2 c-d). On V8A, beakless conidia long elliptical body, with a size range of 46-67 × 13-17 μm, 5-8 transverse septa and 1-2 longitudinal septa; short blunted beak (16-94 × 2-4 μm) conidia obclavate and narrow-to broad-ellipsoid, with a size range of 45-76 × 12-20 μm, 5-8 transverse septa and 1-2 longitudinal septa; long filiform beak (100-150 × 2-3 μm) conidia with, a size range of 53-63 × 15-18 μm, 6-8 transverse septa and 1-3 longitudinal septa ( Fig. 2 View FIGURE 2 j-l). On PCA, beakless conidia, 43-94 × 15-31 μm in size, with 4-8 transverse septa and 0-4 longitudinal septa; short blunted beak (13-96 × 2-4 μm) conidia, 50-75 × 14-32 μm in size, with 5-8 transverse septa and 0-5 longitudinal septa; long filiform beak (114-324 × 2-4 μm) conidia, 49-83 × 15-30 μm in size, with 5-9 transverse septa and 1-5 longitudinal septa ( Fig. 2 View FIGURE 2 g-i).

Materials examined:— China, the Inner Mongolia Autonomous Region, Hohhot City , the farm of Inner Mongolia Agricultural University , from leaves of Vigna unguiculata , 20 Aug , 2017, J. X. Deng, YZU-H-009 (holotype), ex-type culture YZU 171714 About YZU , living cultures YZU 171715 About YZU .

Notes:—Morphologically, it is quite similar to A. helianthiinficiens based on conidial morphology ( Table 2 View TABLE 2 ). The new species produces shorter filiform beak than A. helianthiinficiens on V8A. Except that, there are few conidial evidences to indicate that it is a new species. However, Alternaria vignae can be readily separated with A. helianthiinficiens based on the multigene sequence analyses of ITS, GAPDH, RPB2 and TEF1.

J

University of the Witwatersrand

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