Journal of
Threatened Taxa | www.threatenedtaxa.org | 26 July 2018 | 10(8): 12140–12143
Coltriciella dependens (Berk. & M.A.
Curtis) Murrill, a new addition to wood-rotting fungi
of India
Ayangla S. Pongen ¹,
Kuno Chuzho 2,
N.S.K. Harsh 3, M.S. Dkhar 4 & Manoj Kumar 5
1 Lower PWD Colony, Church Road, Kohima, Nagaland 797001, India
1,3,5 Forest Pathology Division, Forest Research
Institute, Mason Road, Dehradun, Uttarakhand 248006,
India
2,4 Microbial Ecology Laboratory, Centre for
Advanced Studies in Botany, North-Eastern Hill University, Umshing Mawkynroh, Shillong,
Meghalaya 793022, India
1 yonglpnr@gmail.com, 2 kunochuzho@gmail.com,
3 nirmalharsh57@gmail.com, 4 msdkhar@hotmail.com, 5 mnoj23@gmail.com
(corresponding author)
doi: http://doi.org/10.11609/jott.4123.10.8.12140-12143
Editor: R.K. Verma, Tropical Forest
Research Institute, Jabalpur, India Date of publication: 26 July
2018 (online & print)
Manuscript details: Ms # 4123 |
Received 12 March 2018 | Final received 12 June 2018 | Finally accepted 04 July
2018
Citation: Pongen, A.S., K. Chuzho,
N.S.K. Harsh, M.S. Dkhar & M. Kumar (2018). Coltriciella dependens
(Berk. & M.A.
Curtis) Murrill, a new addition to wood-rotting fungi
of India. Journal of Threatened
Taxa 10(8): 12140-12143; http://doi.org/10.11609/jott.4123.10.8.12140–12143
Copyright: © Pongen et al. 2018. Creative Commons Attribution 4.0
International License. JoTT allows
unrestricted use of this article in any medium, reproduction and distribution
by providing adequate credit to the authors and the source of publication.
Funding: None.
Competing interests: The authors declare no competing interests.
Acknowledgements: Author (Kuno
Chuzho) is thankful to University Grants Commission
and Ministry of Tribal Affairs, Govt. of India for providing financial
assistance in the form of NFHE-ST fellowship.
Northeastern India is home to a diverse group of wood-rotting fungi but studies
related to them started only a decade ago.
Very few studies have been conducted so far in this highly species-rich
region. The last few studies have
resulted in new records (Sailo 2010; Lyngdoh & Dkhar 2014a,b; Lyngdoh 2014). In
the present study too, a new record Coltriciella
dependens (Berk. & M.A. Curtis) Murrill is being reported from Meghalaya, India. This is the first record of genus Coltriciella as well. Coltriciella
Murrill which was typified
as C. dependens is a small genus of poroid Hymenochaetaceae with
about 10 species accepted till 2012 (Corner 1991; Aime
et al. 2003; Ryvarden 2004; Dai 2010; Dai & Li
2012; Valenzuela et al. 2012). Later
three more species were added to the list in subsequent years: C. baoshanensis Y.C. Dai & B.K. Cui (Dai et al. 2014)
and C. globosa L.S. Bian
& Y.C. Dai, along with C. pseudodependens
L.S. Bian & Y.C. Dai (Bian
& Dai 2015). Very recently one more
species C. minuscula Susan, Retnowati & Sukarno (Susan et al. 2018) has been added
to the list making it to 14 species till now.
C. dependens differs
from other closely related genera Coltricia Gray mainly by the ornamented basidiospores
(Ryvarden 1991, 2004; Dai 2010).
Fruit-bodies
were collected from the campus of North Eastern Hill University, Shillong (Meghalaya) India on the partially burnt base of Pinus kesiya Royle ex Gordon. Specimens were deposited at the herbarium
of Centre for Advanced Studies in Botany, North-Eastern Hill University, Shillong (Meghalaya) and Fungarium
of Forest Pathology Division, Forest Research Institute, Dehradun (Uttarakhand). The
sections were observed in 2% and 5% KOH and lacto-phenol cotton blue and Phloxine using Leica Phase Contrast Microscope. Microphotographs were taken using a Motic DMWB Digital Microscope. Monographs consulted for identification were Ryvarden & Johansen (1980), Corner (1991) and Nunez
& Ryvarden (2000).
Coltriciella dependens
(Image
1 & Fig. 1)
(Berk.& M.A. Curtis) Murrill, Bull.
Torrey bot. Club 31(6): 348 (1904).
=Coltricia dependens
(Berk. & M.A. Curtis) Imazeki, Bull. Tokyo Sci.
Mus. 6: 109 (1943)
Fruit-bodies
very small pendant (geotropism positive), solitary or fused, forms a distinct
stipe, sometimes with a contracted base; new fruit body arises from older pore
surface. Pilear
surface fawn to rusty brown, usually circular, 0.5–1 cm wide, 1–1.5 cm long, tomentose, soft bristles can be easily seen with a hand
lens, later become agglutinated, wither on maturity leaving striations on
margin, fruit body fragile when dry, light in weight; Stipe concolorous
with the pilear surface, 2–3 x 0.5–0.7 mm long,
descending, simple, expanding gradually or abruptly into the central or excentricpileus, never lateral, base abrupt, thinly tomentose, weathering smooth. Pore surface rusty brown, applanate, pores angular, 1–2 per mm, tubes up to 5mm long,
dissepiments thick; context rusty brown, soft, 0.5mm thick.
Hyphal system
monomitic, generative hyphae simple-septate, 4–8 μm wide, tissue
darkens in 4% KOH like other hymenochaetaceae
members, contextual and tramal hyphae hyaline to pale
yellow, thick-walled, hyaline and narrower in the sub-hymenium, moderately
dichotomously branched; cystidia and cystidioles absent, basidia not
seen; basidiospores ellipsoid to slightly oblong
ellipsoid, yellowish, thick walled, finely verruculose,
7–9 x 4–6 μm.
Specimen
examined: FPD 8734 (FRI, Dehradun), 07.iii.2016, on partially burnt P. kesiya from Shilong located
at an elevation of 1,404m, 25.600N & 91.890E, coll. Ayangla S. Pongen & Kuno Chuzho (Image 2).
C. dependens is subject to neglect because of its
small size. C. dependens
is often associated with burnt woody debris (Nunez & Ryvarden
2000), mostly on pine (Murrill 1919; Ryvarden & Johansen 1980) but have also been reported
to occur on dead oak and poplar wood (Murrill
1919). Beside this, it has been reported
on living roots (Corner 1991) or living tree trunks (Aime
et al. 2003) but it might be just a physical support (Bian
& Dai 2015). It forms anatomically
conspicuous ectomycorrhiza with several host
plants. Bian
& Dai (2015) in their study found that all fruit bodies collected from the
decayed log were associated with abundant ectomycorrhizae
of pine. In molecular studies, Coltricia and Coltriciella (dependens)
were found to possess similar ectomycorrhizal
associations with host plants. Tedersoo et al. (2007a, 2007b) also demonstrated that four
species of Coltricia and Coltriciella
(dependens) form ectomycorrhizae
associations with angiosperm trees of various families (Caesalpiniaceae,
Dipterocarpaceae, and Myrtaceae)
based on sequence data from the rDNA internal
transcribed spacer (ITS) and large subunit (LSU) regions of both ectomycorrhizae root tips and fruit bodies. This tiny fungus is a pan-tropical species
and reported from the subtropical regions of China (Dai & Li 2012), Japan,
North Thailand, Singapore and New Zealand (Corner 1991), North and South
America (Nunez & Ryvarden 2000), Seychelles (Tedersoo et al. 2007b) and Australia (Hubregtse
2017; Bougher 2017). C. dependens is very similar to C. pseudodependens and differs in larger pores and smaller
basidiospores (Bian &
Dai 2015).
C. dependens is the sixth wood-rotting fungus from Meghalaya
that is being reported as new. Before
this, high wood-rotting fungal diversity has been reported from different
forest stands and sacred groves of Meghalaya, northeastern
India. New records of other wood-rotting fungi, viz., Microporus
quarrie (Beeli) D.A.
Reid was reported by Sailo (2010) and Cyclomyces fuscus Kunze ex Fr., Heterobasidion
perplexum (Ryvarden) Stalpers, Humphreya coffeata (Berk.) Steyaert and Bondarzewia berkeleyi (Fr.) Bondartsev
& Singer (from northeastern region) were reported
by Lyngdoh and Dkhar
(2014a, 2014b), Kumar & Harsh (2014). The fungus is easy to recognize because of
the small, rusty brown, pendant fruiting body and microscopically by the finely
verruculose (ornamented) basidiospores
(Ryvarden & Johansen 1980).
Further
studies of wood-rotting fungi in this region will enable us to unveil more
interesting and rare wood-rotting fungal species as many forests of India,
particularly in the north eastern parts still remain unexplored.
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