Zasmidium citri-griseum (F.E. Fisher) U. Braun & Crous, IMA Fungus 5 (2): 337 (2014）

An, Yuan-Yan, Zeng, Xiang-Yu, Geng, Kun, Hyde, Kevin David & Wang, Yong, 2021, One new species and one new record of Zasmidium in China, Biodiversity Data Journal 9, pp. 59001-59001 : 59001

Zasmidium citri-griseum (F.E. Fisher) U. Braun & Crous, IMA Fungus 5 (2): 337 (2014）

Materials

Type status: Other material. Occurrence: catalogNumber: HGUP 1507.3 ; recordedBy: An Yuan-Yan; occurrenceID: living culture GUCC 1507.3 and MFLUCC 20-0138; Taxon: scientificName: Zasmidiumcitri-griseum; kingdom: Fungi; class: Dothideomycetes; order: Capnodiales; family: Mycosphaerellaceae; genus: Zasmidium; Location: country: China; stateProvince: YunNan; locality: Xishuangbanna Dai Autonomous Prefecture ; Identification: identifiedBy: Yuan-Yan An; dateIdentified: 2020; Record Level: language: en

Description

Pathogenic on leaf spot of Cremastra appendiculata ( Asparagales , Orchidaceae ). Lesions on the upper leaf surface, scattered to confluent, distinct, angular, spots elliptic to suborbicular, reddish-brown to dark brown, 2-5 mm, on the lower leaf surface similar. Colonies on PDA 10-15 mm diam. in 2 weeks, with an even, dark-brown margin. Surface fold, with gully shape. Conidiophores arising singly as lateral branches of superficial hyphae, semi-macronematous to macronematous, mononematous, erect to flexuous, sometimes curved, unbranched, thick-walled, non-smooth surface, 1-3-septate, cylindrical, geniculate, brown, 35-135 × 5-7 µm. Conidiogenous cells integrated, terminal, 5-10 µm long, sympodial, polyblastic, cylindrical, geniculate, scars slightly thickened and darkened, 0.5-1.5 µm in diam. Conidia solitary in simple or occasionally branched chains, short to long cylindrical, some ends swollen straight to somewhat curved, 8-41 × 2-5 µm, unseptate, light brown, thin-walled, verruculose, 2-3.5 µm wide. (Fig. 2 )

Figures

Figure 2. Zasmidium citri-griseum (GUCC 1507.3) a. Leaf spot symptoms on host; b. Culture on PDA; c. Hyphae and conidiophores on PDA culture; d-h. Conidiophores, conidiogenous cells and conidia; i. Conidia; j, k. Conidiogenous cells and conidia; l-p. Conidia. Scale bars: c = 100 µm, d-g = 10 µm, h = 5 µm, i, j = 10 µm, k-p = 5 µm.