Pleosporales » Phaeosphaeriaceae » Amarenomyces

Amarenomyces dactylidis

Amarenomyces dactylidis Mapook, Camporesi & K.D. Hyde, in Hyde et al., Fungal Divers 87: 78 (2017)

Index Fungorum number: IF557841,        Facesoffungi number: FoF 07933

 

Sexual morph: Ascomata 170–230 μm high, 160–260 μm diam., scattered, solitary, semi-immersed to superficial, visible as raised, black dots on the host surface, globose to subglobose, uniloculate, glabrous, ostiole central, with minute, papilla (20–45 × 25–55 μm, l/w), 9 fissitunicate, cylindrical to cylindric-clavate, short pedicellate, with furcate pedicel, apically rounded, with well-developed ocular chamber. Ascospores (19–)(23–)25–28(–32) × 4.5–6 μm (x̅ = 26.1 × 5.5 μm, n = 50), overlapping

1–2-seriate, yellowish brown to brown, fusiform to subcylindrical, slightly narrower towards the end cells, asymmetrical, 7–8-septate, slightly constricted at the septa, enlarged at the 5th or 6th cell from above, flattened at the 2nd to 4th, or 5th cells, smooth-walled, surrounded by a distinct mucilaginous sheath. Asexual morph: Undetermined.

 

Culture characteristics: Colonies on PDA reaching 35–38 mm diam. after 3 weeks at room temperature (20–30 ºC). Colony dense, irregular in shape, flattened to slightly raised, surface smooth, with edge undulate, velvety to floccose; from above, initially white, with pale grey at the centre, becoming greenish grey after 4 weeks; from below, white to pale yellowish at the margin, dark brown at the centre, becoming black after 4 weeks; not producing pigmentation on agar medium.

 

Habitat: -

 

Known hosts: -On dead aerial stems of Dactylis glomerata and on dead fronds of a fern

 

Known distribution: Poaceae, Italy, Yunnan Province, China

 

Material examined: CHINA, Yunnan Province, Baoshan, Shuizai, Dawazi mountain, on dead fronds of a fern, 22 October 2015, I.D. Goonasekara, BS008 (KUNHKAS 102230), living culture, KUMCC 18-0154.

 

GenBank Accession No: ITS: MK356371, LSU: MK356345,, SSU: MK356359..

 

Notes: Multigene phylogenetic analyses show that the new strain KUMCC 18-0154 is sister to Amarenomyces dactylidis (MFLUCC 14-0207) with high support (98% ML and 1.00 BYPP). A comparison of ITS nucleotide base pairs shows that KUMCC 18-0154 is identical (1/541 bp) to A. dactylidis and thus, we identify our new isolate as A. dactylidis. Our isolate (KUN-HKAS 102230) shares a size range of the ascomata, asci and ascospores as well as the ascospore septation with the type (MFLU 17-0498). Although, our isolate is slightly larger in ascomata, asci and ascospores, but ITS sequence data showed that they are conspecific (Hyde et al. 2017). Therefore, A. dactylidis is reported from a fern in Yunnan, China for the first time.

 

Figure X. Amarenomyces dactylidis (KUN-HKAS 102230). a Appearance of ascomata on host. b Section through ascoma. c Section through peridium. d Cellular pseudoparaphyses. e–h Asci. i–n Ascospores. o Ascospore stained with Indian ink. p Ascospore germination. Scale bars a = 200 lm, b = 50 lm, c–h = 20 lm, i–p = 10 lm

Reference: Phookamsak R, Hyde KD, Jeewon R, Bhat DJ, et al. (2019) Fungal diversity notes 929–1035: taxonomic and phylogenetic contributions on genera and species of fungi. Fungal Diversity (2019) 95:1–273

 

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Supported by 

Thailand Science Research and Innovation (TSRI),

project entitled:

"The future of specialist fungi in a changing climate: baseline data for generalist and specialist fungi associated with ants Rhododendron species and Dracaena species"

(Grant No. DBG6080013)

"Impact of climate change on fungal diversity and biogeography in the Greater Mekong Sub-region"

(Grant No. RDG6130001)

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  • Addresses:
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    57100 Thailand
  • 2 Kunming Institute of Botany
  • Chinese Academy of Sciences,
  • Honghe County 654400, Yunnan, China


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