Colletotrichum siamense Prihast., L. Cai & K.D. Hyde, in Prihastuti, Cai, Chen, McKenzie & Hyde, Fungal Diversity 39: 98 (2009)

Index Fungorum: 515410 Faces of fungi number: FoF 03599

Endophytic on C. grandis cv ‘Tomentosa’ leaf. Sexual morph: not observed. Asexual morph on PDA: Conidiomata is formed on the surface of mycelium, liquid or gel, light yellow to orange red. Conidiophores 20–40 × 3–5 μm (x̄= 30 × 4, n= 50), undiaphragmed, hyaline, cylindrical, unbranched and arranged densely. Conidia 10–20 × 4–6 μm (x̄= 15 × 5 μm, n= 50), unicellular, hyaline, smooth-wall, oblong or fusiform with obtuse to slightly rounded ends. Appressoria was oval, umber, mostly formed from mycelia smooth edges.

Cultural characteristics. Colonies on PDA reaching 80 mm diam. in seven days at 28℃. growth rate 11–12 mm/day (x̄= 11 mm, n=6), Colonies circular, margin filiform, slightly rasied, leek green mycelia. Conlony from above: leek green, reverse: flesh. The culture emerged fruiting body and amber or apricot Conidiomata at 3–5 wk.

Material examined. China, Guangdong province, Huazhou, isolated from healthy twigs of C. grandis cv ‘Tomentosa’, May 2019, YX Shu, (dried cultures ZHKU 21-0085); living cultures ZHKUCC 21-0096, ZHKUCC 21-0097, ZHKUCC 21-0098).

Habit and host. Acca sellowiana, Allium cepa, Aloe vera, Alpinia purpurata, Amorphophallus paeonifolius, Anacardium humile, Anacardium occidentale, Bauhinia forficata subsp. pruinosa, Bauhinia variegata, Begonia sp., Camellia sp., Capsicum sp., Citrus sp., Coffea sp. , Commelina sp., Corchorus capsularis, Cymbopogon citratus, Dionaea muscipula, Dioscorea rotundata, Diospyros kaki, Elettaria cardamomum, Ensete superbum, Eriobotrya japonica, Erythrina variegata, Euonymus japonicus, Ficus carica, Ficus elastica, Fragaria sp., Gossypium hirsutum, Heliconia rostrata, Hevea brasiliensis, Hibiscus sp., Hymenocallis sp., Iris tectorum, Jasminum mesnyi, Jasminum sambac, Juglans regia, Licania tomentosa, Liriodendron chinense-tulipifera, Litchi chinensis.

Known distribution. Argentina, Australia, Brazil, Bangladesh, China, Colombia, India, Indonesia, Islands, Kenya, Malawi, Nigeria, Sri Lanka, South Korea, Taiwan,Thailand, United States, Viet Nam .

Colletotrichum siamense (ZHKUCC 21-0096) A, B. Upper and reverse sides of cultures on PDA seven days after inoculation..C. Fruit body. D. Conidiomata E–G. Conidiophores with developing conidia. H, I. Conidia on PDA. J–L. Appressoria. Scale bars: 10um (E–I); 20μm (J–L).

Morphological characteristics of Colletotrichum siamense (ZHKUCC 21-0096) A, B. Upper and reverse sides of cultures on PDA seven days after inoculation..C. Fruit body. D. Conidiomata E–G. Conidiophores with developing conidia. H, I. Conidia on PDA. J–L. Appressoria. Scale bars: 10um (E–I); 20μm (J–L).

Species