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Colletotrichum: complex species or species ... - CBS - KNAW

Colletotrichum: complex species or species ... - CBS - KNAW

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The <strong>Colletotrichum</strong> gloeosp<strong>or</strong>ioides <strong>species</strong> <strong>complex</strong>Fig. 14. <strong>Colletotrichum</strong> alienum. A. ICMP 12071 – ex-holotype culture. B. ICMP 12068. C. ICMP 18691 (ex DAR 37820). A–C. Cultures on PDA, 10 days growth from singleconidia, from above and below.variable in shape, simple to broadly lobed, sometimes in groups,sometimes intercalary, about 7–17 × 4–9.5 µm. Perithecia not seenin culture.Geographic distribution and host range: Confirmed only from NewZealand, but GenBank rec<strong>or</strong>ds suggest C. aotearoa also occurs inChina (see below). In New Zealand this <strong>species</strong> is common on ataxonomically diverse set of native plants, as both a fruit rot and aleaf endophyte, and has also been isolated from leaves of several<strong>species</strong> of naturalised weeds.Genetic identification: ITS sequences do not separate C. aotearoafrom several taxa in the Kahawae and Musae clades. This <strong>species</strong>can be distinguished using several other genes, including TUB2,CAL, GS, and GAPDH.Notes: All isolates in the C. gloeosp<strong>or</strong>ioides <strong>complex</strong> from NewZealand native plants studied here belong in the Kahawaeclade, and most of these are C. aotearoa; a small number of leafendophyte isolates from New Zealand native trees are C. kahawaesubsp. ciggaro. The C. aotearoa isolates have been isolated asendophytes from symptomless leaves as well as from rotting fruitfrom native trees. M<strong>or</strong>phologically indistinguishable from isolatesof C. kahawae subsp. ciggaro, this <strong>species</strong> is distinguishedgenetically with all genes sampled, except ITS. The GAPDH genetree splits C. aotearoa into two well supp<strong>or</strong>ted clades, but these donot c<strong>or</strong>relate to any other features, either geographic <strong>or</strong> biological.Isolates associated with distinctive and common leaf spots onMeryta sinclairii, first rec<strong>or</strong>ded by Beever (1984), belong in this<strong>species</strong>. Whether isolates of C. aotearoa from other hosts are ableto cause the same disease on Meryta is not known.Also in C. aotearoa are a range of isolates from weeds thathave become naturalised in New Zealand. We assume that C.aotearoa is a New Zealand native <strong>species</strong>. It has a broad hostrange amongst native plants and has apparently jumped host tosome weeds. It has never been found associated with cultivatedplants <strong>or</strong> as a rot of cultivated fruit.<strong>Colletotrichum</strong> aotearoa may also occur in China. ITSsequences from isolates from Boehmeria from China (GenBankrec<strong>or</strong>ds GQ120479 and GQ120480) from Wang et al. (2010)match exactly a set of C. aotearoa isolates. ITS between-<strong>species</strong>differences within the C. gloeosp<strong>or</strong>ioides <strong>complex</strong> are very small,so this match needs confirming with additional genes. C. aotearoawas referred to as Undescribed Group 2 by Silva et al. (2012b).Other specimens examined: New Zealand, Auckland, Freemans Bay, on Vitexlucens fruit, coll. P.R. Johnston C1252.1, 26 Aug. 2007 (ICMP 18532; PDD 92930).on Berberis sp. leaf spot, coll. N. Waipara C69 (ICMP 18734); Auckland, Mangere,on Berberis glaucocarpa leaf spot, coll. N. Waipara C7, Jun. 2007 (ICMP 18528);Auckland, Waitakere Ranges, on Kunzea ericoides leaf endophyte, coll. S. Joshee7Kun3.5, Jan. 2004 (ICMP 17324); Auckland, Waitakere Ranges, on Prumnopitysferruginea leaf endophyte, coll. S. Joshee 8Mb5.1, Jan. 2004 (ICMP 18533); Auckland,Waitakere Ranges, on Dacrycarpus dacrydioides leaf endophyte, coll. S. Joshee5K5.9, Jan. 2004 (ICMP 18535); Auckland, St Johns, Auckland University campus,on Coprosma sp. incubated berries, coll. B. Weir C1282.1, 30 Apr. 2009 (ICMP18577); Auckland, Mt Albert, on Acmena smithii lesions fruit, coll. P.R. Johnston C847,9 Sep. 1987 (ICMP 18529); Auckland, Glen Innes, Auckland University campus, onCoprosma sp. incubated berries, coll. B. Weir C1282.3, 30 Apr. 2009 (ICMP 18536);Auckland, Orakei, on Ligustrum lucidum leaf spot, coll. C. Winks & D. Than M136.3(ICMP 18748); Auckland, Waitakere Ranges, on Podocarpus totara leaf endophyte,coll. S. Joshee 3T5.6, Jan. 2004 (ICMP 17326); Auckland, Waitakere Ranges, Huia,on Geniostoma ligustrifolium leaf endophyte, coll. S. Bellgard M128, 8 Jul. 2010 (ICMP18540); Auckland, Waitakere Ranges, Huia, on Coprosma sp. rotten berry, coll. S.Bellgard M130-2, 8 Jul. 2010 (ICMP 18541); Auckland, Waiheke Island, Palm Beach,on Meryta sinclairii leaf spot, coll. P.R. Johnston C1310.1, 21 Mar. 2010 (PDD 99186;ICMP 18742); Auckland, Tiritiri Island, on Dysoxylum spectabile fruit rot, coll. P.R.www.studiesinmycology.<strong>or</strong>g141

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