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(Orchidaceae) and Identification of Its Mycorrhizal Fungi

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(Orchidaceae) and Identification of Its Mycorrhizal Fungi Bull. Natl. Mus. Nat. Sci., Ser. B, 42(3), pp. 95–102, August 22, 2016 New Records of Liparis purpureovittata (Orchidaceae) and Identification of its Mycorrhizal Fungi Chie Tsutsumi1,*, Ayako Maeda2, Yumi Yamashita1,3, Takahide Kurosawa3, Akitomo Uchida4, Taiga Kuhara5 and Tomohisa Yukawa1 1 Department of Botany, National Museum of Nature and Science, Amakubo 4–1–1, Tsukuba, Ibaraki 305–0005, Japan 2 Kochi Prefectural Makino Botanical Garden, Godaisan 4200–6, Kochi 781–8125, Japan 3 Faculty of Symbiotic Systems Science, Fukushima University, Kanayagawa 1, Fukushima 960–1296, Japan 4 Shiretoko Museum, 49–2 Hon-machi, Shari, Hokkaido 099–4113, Japan 5 Niigata Prefectural Botanical Garden, Kanazu 186, Akiha-ku, Niigata 956–0845, Japan * E-mail: [email protected] (Received 12 May 2016; accepted 22 June 2016) Abstract We revise the distribution area of Liparis purpureovittata with new records from west- ern Japan (Ehime Pref. and Kochi Pref.) and central to northern Japan. In molecular analyses of mycorrhizal fungi of L. purpureovittata, Tulasnella (Tulasnellaceae), which is among predominant mycobiont groups of the Orchidaceae including the other Liparis species, was detected from the plants, suggesting its status of the fungal parter. Key words : Japan, Liparis, mycorrhiza, orchid, Tulasnella. was also reported from Toyama Pref., central Introduction Japan (Toyama Prefecture, 2012). Recently, we Liparis Rich. is a cosmopolitan orchid genus found the species from Ehime Pref. and Kochi consisting of about 320 species, including epi- Pref. in Shikoku, western Japan. Furthermore, phytes and terrestrial plants (Pridgeon et al., the species was also observed in several locali- 2005). In Japan, 17 species of Liparis are recog- ties from central to northern Japan. In this report, nized (Yukawa, 2015). Liparis purpureovittata we revise the distribution area of L. purpureovit- Tsutsumi, T.Yukawa & M.Kato was recently tata. described as a new species (Tsutsumi et al., Mycorrhizal symbiosis is a key issue to deter- 2008). The species is morphologically and phylo- mine habitats or geographical distributions of genetically close to L. fujisanensis F.Maek. ex orchid plants (Rasmussen, 1995; Batty et al., Konta & S.Matsumoto, L. kumokiri F.Maek. and 2001; Ogura-Tsujita and Yukawa, 2008; Barrett L. koreojaponica Tsutsumi, T.Yukawa, N.S.Lee, et al., 2010; Roche et al., 2010). Most mycorrhi- C.S.Lee & M.Kato. It can be distinguished from zal fungi in the Orchidaceae belong to narrow the congeners by the shapes of labellum and col- ranges of taxa in Basidiomycota, such as Cerato- umn and the flower color (Tsutsumi et al., 2008). basidiaceae, Tulasnellaceae, and Sebacinaceae, Liparis purpureovittata was recorded in sev- whereas Glomeromycota, forming arbuscular eral areas in Hokkaido, Niigata, Nagano, and mycorrhizae that are common in most land Gunma Prefectures in central to northern Japan plants, have not been recorded from the Orchida- (Tsutsumi et al., 2008). Subsequently, the species ceae (Yukawa et al., 2009). In several Liparis 96 Chie Tsutsumi et al. species such as L. japonica (Miq.) Maxim., L. chain reaction (PCR) amplification without DNA kumokiri, L. liliifolia (L.) A.Rich ex Lindl., and extraction. The internal transcribed spacer (ITS) L. loeselii (L.) Rich., which are closely related to regions with the 5.8S region of nuclear ribosomal L. purpureovittata (Tsutsumi et al., 2007), Tulas- DNA were used for fungal identification. A pair nella (Tulasnellaceae) has been found with of primers ITS1-F and ITS4 (White et al., 1990; molecular techniques (McCormick et al., 2004; Gardens and Bruns, 1993) was used. PCR was Illyés et al., 2005; Shimura et al., 2009; Ding et performed using a Perkin-Elmer 9700DNA ther- al., 2014). To clarify mycorrhizal partners of L. mal cycler (Applied Biosystems, Foster, CA) purpureovittata, molecular identification of the with Ex Taq DNA polymerase (TaKaRa Bio, fungi was performed. Tokyo) and Ampdirect Plus (Shimadzu, Kyoto); the reaction conditions were as follows: 30 dena- turation, annealing, and elongation cycles for 30 s Materials and Methods at 94°C, 30 s at 50°C, and 90 s at 72°C, respec- Leaves of Liparis purpureovittata collected tively, with a final elongation step for 7 min at from Saijo-shi, Ehime Pref. (Y. Hagino et al. 72°C. The PCR products were purified using FOS-009187, FOS-009189) were used for illustra ExoProStar (GE Healthcare, Bucking- molecular identification of plants. DNA from the hamshire) following the manufacturer’s instruc- leaf samples was extracted using a QIAGEN tions. Sequences were analyzed using ABI3130xl DNeasy Mini Kit (QIAGEN, Valencia, CA) fol- or ABI 3500xl (Applied Biosystems) and assem- lowing the manufacturer’s instruction. The inter- bled using Seqman II (DNAstar Lasergene, WI). nal transcribed spacer (ITS) regions with the The sequences analyzed in this study were regis- 5.8S region of nuclear ribosomal DNA were tered in Genbank (LC158688–LC158689 for examined as described by Tsutsumi et al. (2007). Tulasnella, LC158690 for Exophiala). The obtained sequencing patterns were compared The sequences were submitted to BLAST to those of the sample of L. purpureovittata searches (Altshul et al., 1997) against the NCBI examined by Tsutsumi et al. (2007). sequence database (Genbank) to detect closely For fungal identification, fungal hyphae were matched sequences. We assigned the genus or isolated from five corms of Liparis purpureovit- family names to our samples based on the regis- tata collected from Saijo-shi, Ehime Pref. The tered sequences with ＞96% ITS similarity. The corms were thoroughly washed in running water. BLAST searches revealed that Tulasnella are After the outer tissues of the corms were candidates of mycorrhizal partner of L. pur- trimmed, the remaining inner tissues were sliced pureovittata (see Results and Discussion). There- into pieces using clean razor blades. Each piece fore we performed molecular phylogenetic anal- was washed three times in sterilized distilled yses using our samples identified as Tulasnella, water and crushed using a sterilized glass rod in 30 registered sequences with high Max scores by a Petri dish, into which about 15 mL of corn meal the BLAST searches, and ITS sequences ana- agar (CMA; Nissui Pharmaceutical Co., Tokyo) lyzed by Girlanda et al. (2011). Girlanda et al. containing 150 ppm streptomycin and 50 ppm tet- (2011) comprehensively analyzed a close relative racycline were added. A few days after incuba- group of Tulasnella to our samples. All assem- tion at approximately 25°C in the dark, fungal bled sequences were aligned using the Clustal X hyphae growing from pelotons (hyphal coils) program (Thompson et al., 1997) and then were transferred to new CMA plates for purifica- aligned manually. The alignment was easily per- tion. The isolates were transferred and cultured formed, whereas the nuclear ribosomal operon of on potato dextrose agar slants (Nissui Pharma- the Tulasnellaceae is known to evolve exceed- ceutical Co.) at approximately 25°C in the dark. ingly rapidly (Taylor et al., 2002; Binder et al., The hyphae were directly used for polymerase 2005; Moncalvo et al., 2006). For outgroups, New Records of Liparis purpureovittata 97 mycorrhizal fungi from Dendrobium crumena- at 2 July 2015. The large individuals with about tum (AJ313438) and Vanda ‘Miss Joaquim’ nine flowers were observed in partially shaded (AJ313443) were used in the ITS analysis based places under the shrubs, and the small individu- on the result of phylogenetic analysis in Girlanda als with 3–6 flowers and juveniles were in light et al. (2011). places. Some individuals had no purple tints in Phylogenetic analyses were performed using the green flowers. In this area, several individu- Bayesian analysis. Ambiguous bases and gaps als of the orchid Malaxis monophyllos (L.) Sw. were treated as unknown (N) and missing data, occurred together. respectively. MrModeltest 2.0 was used to deter- We also recorded L. purpureovittata from mine nucleotide substitution models (Nylander, other localities in central and northern Japan 2004). GTR ＋ I ＋ G models were selected. (Fig. 2); Shari-gun, Hokkaido, 280 m alt., 21 Jul. Bayesian searches were conducted using Markov 2013 (A. Uchida s.n. [TNS]), Rebun Island, Hok- Chain Monte Carlo with two independent sets of kaido (S. Miyamoto pers. comm., determined by four chains; each was run for 10 million genera- photographs), Yuza-machi, Yamagata Pref., tions with sampling every 100 generations by 1120 m alt. (K. Sawa and S. Kawakami, pers. using MrBayes 3.1.2 (Huelsenbeck and Ron- comm., determined by photographs), Yama-gun, quist, 2001; Ronquist and Huelsenbeck, 2003). Fukushima Pref., 1385 m alt., 9 Jul. 2013 (Y. The program Tracer (Rambaut and Drummond, Yamashita 264 [FKSE 69074]), and Ohno-gun, 2009) was used to check the runs that had Gifu Pref. (H. Nakayama pers. comm., deter- reached stationarity; the effective sample size of mined by photographs). In the Shari-gun plants, all the parameters was high (＞200). The first 2.5 green flowers without purple tints were also million generations were discarded as burn-in observed. Those flowers are morphologically periods and the remaining trees were used to cal- similar except in the flower color. culate posterior probabilities. In Shari-gun, Hokkaido, three individuals were observed in the semi-open and partially shaded places. In Yuza-machi, Yamagata Pref., Results and Discussion almost 10 individuals were found on the damp New localities ground with Nephrophyllidium crista-galli (Men- Liparis purpureovittata was found in cool- zies ex Hook.) Gilg. In Yama-gun, Fukushima temperate mixed conifer and deciduous forests at Pref., 30 individuals occurred along a trail in the the border between Saijo-shi, Ehime Pref. and mountain grassland. Based on those results, we Agawa-gun, Kochi Pref. (Y. Hagino et al. FOS- found out that L. purpureovittata is widely dis- 009187, FOS-009189, ca. 1670 m alt., 2 Jul. tributed in light and partially shaded places in 2015 [MBK0272829, MBK0272831]; Figs. 1, 2. mountain grasslands, in damp grounds or along T.
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