Lasiodiplodia tropica
Lasiodiplodia tropica Y. Zhang ter & S. Lin, Mycological Progress 18: 693. 2019.
Index Fungorum: IF 829246; MycoBank: MB 829246.
Colony sporulating on pine needles and SNA. Asexual morph: Conidiomata up to 500 μm diam., stromatic, solitary, immersed and superficial, iron-gray to dark gray. Paraphyses up to 60 μm long, 3–4 μm wide, filiform, hyaline, unbranched, aseptate, becoming up to one-to-two-septate when mature. Conidiophores reduced to conidiogenous cells. Conidiogenous cells up to 8–12 μm long, 3–4 μm wide (av. = 9.3 × 3.7 μm, n = 40), holoblastic, discrete, hyaline, smooth, thin- walled. Conidia (17–) 18–24 (–25) × (12–) 13–14 (–15) μm (av. = 21.2 × 12.4 μm, n=50), L/W ratio = 1.7, hyaline, aseptate, smooth, wall 2 μm thick, ellipsoid to ovoid, both ends broadly rounded, becoming pale brown with septate and longitudinal striationswhen aged. Sexual morph: not observed.
Culture characteristics: Colonies reaching 50 mm diam. on MEA after 2 d in the dark at 28 °C, initially white, becoming ash-gray after 5 days.
Representative isolate: Laos, Vientiane, near the international airport, Aquilaria crassna, Oct. 2012, leg. X. Sun, holotype HMAS 255195, CGMCC 3.18477 (ex-type culture).
Hosts: Aquilaria species (Wang et al. 2019).
GenBank Numbers: ITS KY783454; tef1-a KY848616; TUB KY848540; RPB2 KY848574
Notes: Morphologically, Lasiodiplodia tropica with the smaller-sized conidia and only about 2 weeks for the conidia to become pigmented.
References:
Wang Y, Lin S, Zhao L, Sun X, He W, Zhang Y, Dai YC (2019) Lasiodiplodia spp. associated with Aquilaria crassna in Laos. Mycological Progress 18, 683–701.
https://doi.org/10.1007/s11557-019-01481-7