論文 - 内貴　章世

Comparison of mechanisms of reproductive interference in Taraxacum.

Takemori A, Naiki A, Takakura KI, Kanaoka MM, Nishida S

Annals of botany ( Annals of Botany )  123 ( 6 ) 1017 - 1027   2019年06月 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）

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BACKGROUND AND AIMS: Reproductive interference may reduce fitness of either of the involved species, with potentially important ecological and evolutionary consequences. Except for the effect of shared pollinators on reproductive success, however, mechanisms underlying reproductive interference have been little studied, even though the severity of its impact may depend on the specific mechanism. The aim of this study was therefore to explore the mechanisms of reproductive interference between Taraxacum japonicum (native to Japan) and Taraxacum officinale (alien). METHODS: In a field survey, the association between alien species density and seed set in T. japonicum, and whether pollinator behaviour indicated a preference for the alien, were examined. Effects of heterospecific pollen deposition were measured in a series of hand pollination experiments, including mixed pollination experiments in which the order of application of conspecific and heterospecific pollen was varied. Finally, to investigate hybridization frequency, the parentage of seedlings produced following natural, mixed or heterospecific pollination was compared. KEY RESULTS: Alien species density did not negatively affect native seed set, nor did pollinators appear to have a preference for alien flowers. The hand pollination experiments showed that heterospecific pollen deposition adversely affected native seed set, especially when alien pollen was applied before conspecific pollen. No viable hybrids were found following natural pollination, which suggests that hybridization might be a rare event. CONCLUSION: Among the examined mechanisms, heterospecific pollen deposition might have the largest deleterious effect on the native species. This effect is frequency dependent; thus, a positive feedback loop may cause the effect on the population dynamics to increase over time, with the result that the alien might eventually displace the native in a population. Effects of the examined mechanisms on population dynamics should be investigated further to improve understanding of the impact of reproductive interference on the structure of plant communities.

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Calophyllum honbaense (Clusiaceae), A new species from Hon Ba Nature Reserve, Southern Vietnam

Dang Van-Son, Toyama Hironori, Tagane Shuichiro, Hoang Nghia-Son, Naiki Akiyo

TAIWANIA   64 ( 1 ) 86 - 89   2019年03月 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）

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Lasianthus bidoupensis (Rubiaceae), a New Species from Southern Vietnam

Dang V.S., Tagane S., Hoang N.-S., Toyama H., Naiki A.

Annales Botanici Fennici ( FINNISH ZOOLOGICAL BOTANICAL PUBLISHING BOARD )  56 ( 1-3 ) 191 - 195   2019年02月 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）

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A new species, Lasianthus bidoupensis V.S. Dang & Naiki (Rubiaceae) is described and illustrated from Bidoup Nui Ba National Park, Lam Dong Province, southern Vietnam. It resembles L. yaharae which was recently discovered from Mt. Hon Ba and L. dalatensis which is endemic to Dalat, southern Vietnam. However, L. bidoupensis differs from them by having larger leaves and bracts, longer petioles, stipules, calyx and corolla tubes, and deep-red mature fruits.

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Two new species of Lasianthus (Rubiaceae) from Hoang Lien National Park, northern Vietnam

Dang V., Naiki A.

Phytotaxa ( MAGNOLIA PRESS )  423 ( 1 ) 33 - 40   2019年 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）

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Two new species, Lasianthus fansipanensis V.S. Dang & Naiki and Lasianthus sapaensis V.S. Dang & Naiki (sect. Nudiflorae), were discovered in the Hoang Lien National Park of northern Vietnam and are here described and illustrated. Colour photographs, preliminary conservation assessment, and tables comparing these two new species against two closely related species are also presented.

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Two New Species of Neolitsea (Lauraceae), N. kraduengensis from Thailand and N. vuquangensis from Vietnam and an Analysis of their Phylogenetic Positions using ITS sequences

Mitsuyuki Chika, Tagane Shuichiro, Nguyen Van Ngoc, Hoang Thi Binh, Suddee Somran, Rueangruea Sukid, Toyama Hironori, Mase Keiko, Yang Chen-Jue, Naiki Akiyo, Yahara Tetsukazu

Acta Phytotaxonomica et Geobotanica ( 日本植物分類学会 )  69 ( 3 ) 161 - 173   2018年10月 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）

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Two novel species of Neolitsea (Lauraceae), Neolitsea kraduengensis Tagane & Yahara and N. vuquangensis Mitsuyuki & Yahara, are described and illustrated. Neolitsea kraduengensis occurs in Phu Kradueng National Park, Loei Province, Northeast Thailand. Neolitsea vuquangensis is in Vu Quang National Park, Ha Tinh Province, North Central Vietnam. Morphological differences of the two species from similar species are presented. A phylogenetic tree reconstructed from ITS sequences supports their distinctiveness. Two phenotypically similar species, Neolitsea aurata and N. vuquangensis , with dense golden yellow hairs on the leaf blades, are not sister to each other.

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Contributions to the Flora of Myanmar II: New records of eight woody species from Tanintharyi Region, Southern Myanmar

Tagane S.

Natural History Bulletin of the Siam Society ( Natural History Bulletin of the Siam Society )  63 ( 1 ) 47 - 56   2018年10月 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）

Erythroxylum calyptratum (Erythroxylaceae), a new species from Mt. Fansipan, northern Vietnam

Komada N., Tagane S., Ngoc T. N., Binh H. T., Son H. T., Toyama H., Nagamasu H., Naiki A.

Phytotaxa ( Magnolia Press )  347 ( 4 ) 279 - 284   2018年04月 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）

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Erythroxylum calyptratum, sp. nov. (Erythroxylaceae), from Mt. Fansipan, Hoang Lien National Park, Lao Cai Province, northern Vietnam, is newly described. The new species is characterized by thinly chartaceous leaves with 2–3 mm long petiole, 1–3 flowered inflorescences, downward facing white flowers, well-developed petal appendages (1/3–1/2 length of petals) and entirely free 3 styles. A description, illustrations, DNA barcodes of rbcL and matK and a key to the species of Erythroxylum in Indochina are provided.

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A new record Lasianthus cambodianus Pit. (Rubiaceae) for the flora of Vietnam

Dang VS, Tagane S, Toyama H, Ngoc NV, Son HN, Naiki A

Journal of biotechnology   15 ( 3A ) 263 - 267   2018年04月 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）

Lecanorchis sarawakensis (Orchidaceae, vanilloideae), a new mycoheterotrophic species from sarawak, Borneo

Suetsugu K., Yiing L. C., Naiki A., Tagane S., Takeuchi Y., Toyama H., Yahara T.

Phytotaxa ( MAGNOLIA PRESS )  338 ( 1 ) 135 - 139   2018年02月 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）

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Contributions to the Flora of Myanmar: I: Nine taxa of monocots newly recorded from Myanmar

TANAKA Nobuyuki, TAGANE Shuichiro, NAIKI Akiyo, AUNG Mu Mu, TANAKA Noriyuki, DEY Santanu, MOOD John, MURATA Jin

Bulletin of the National Museum of Nature and Science. Series B. Botany   44 ( 1 ) 31‐39   2018年02月 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）

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Gentiana laotica, a new species of Gentianaceae from Laos

Souladeth P., Tagane S., Naiki A., Nagamasu H., Yahara T.

Thai Forest Bulletin (Botany)   46 ( 1 ) 72 - 75   2018年01月 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）

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© 2018 The Forest Herbarium A new species of Gentiana (Gentianaceae), G. laotica Soulad., Tagane & Yahara, from Phou Khao Khouay National Protected Area, Vientiane Province, central Laos, is described. Photographs, vernacular name, DNA barcodes of rbcL, matK and ITS, and preliminary conservation status are provided for the new species.

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Five new species of syzygium (Myrtaceae) from Indochina and Thailand

Tagane S., Dang V. S., Souladeth P., Nagamasu H.,Toyama H., Naiki A., Fuse K., Tran H., Yang C.-J., Prajaksood A., Yahara T.

Phytotaxa   375 ( 4 ) 247 - 260   2018年 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）

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Mussaenda recurvata (Rubiaceae), a new species from southern vietnam with observations on its heterostyly

Naiki A., Tagane S., Toyama H., Dang V. S., Yahara T.

Phytotaxa ( MAGNOLIA PRESS )  328 ( 2 ) 167 - 174   2017年11月 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）

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Herein, Mussaenda recurvata, a new species from Hon Ba Nature Reserve, southern Vietnam, is described and illustrated. This species is morphologically similar to M. longipetala, distributed from southern China to northern Vietnam, in having recurved stipules and densely pilose and puberulent hairs throughout, but differs in its strongly recurved calyx lobes, a shorter corolla tube, and ovate corolla lobes. The species is morphologically heterostylous and it appears to be functionally dioecious. An updated key to Mussaenda species in Vietnam, Laos, and Cambodia is also provided.

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<i>Macrosolen bidoupensis</i> (Loranthaceae), a new species from Bidoup Nui Ba National Park, southern Vietnam.

Tagane S, Dang VS, Ngoc NV, Binh HT, Komada N, Wai JS, Naiki A, Nagamasu H, Toyama H, Yahara T

PhytoKeys ( PhytoKeys )  ( 80 ) 113 - 120   2017年 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）

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Macrosolen bidoupensis Tagane &amp V.S.Dang, sp. nov. (Loranthaceae) is newly described from Bidoup Nui Ba National Park in Lam Dong Province, southern Vietnam. The new species is characterized by small broadly elliptic to circular leaves, sessile to short petioles, slightly cordate to rounded leaf bases, 4-5 pairs of lateral veins and a basally green corolla tube. An illustration, a summary of DNA barcoding of the plastid genes rbcL and matK, and a key to the species of Macrosolen in Vietnam are provided.

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Garcinia hopii (Clusiaceae), a new species from Bidoup Nui Ba National Park, southern Vietnam.

Hironori Toyama, Van-Son Dang, Shuichiro Tagane, Ngoc Van Nguyen, Akiyo Naiki, Hidetoshi Nagamasu, Tetsukazu Yahara

PhytoKeys ( PENSOFT PUBL )  77   63 - 70   2017年 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）

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A new species, Garcinia hopii H. Toyama & V. S. Dang is described from Bidoup Nui Ba National Park, southern Vietnam. This species is similar to Garcinia hendersoniana Whitmore but differs from that species in having larger leaves, clustered pistillate flowers, a greater number of sterile anthers and a larger stigma of young fruits. A description, preliminary conservation assessment, illustration, photographs and DNA barcodes of the new species are provided, as well as an updated key to Garcinia sect. Hebradendron in Indochina.

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Heteropanax thaiensis, a new species and Schefflera wrayi (Araliaceae), a new record to Thailand

Tagane S.

Thai Forest Bulletin (Botany) ( Thai Forest Bulletin (Botany) )  45 ( 2 ) 99 - 104   2017年 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）

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Two New Taxa and One New Report of Tarenna (Rubiaceae) for the Flora of Cambodia and Vietnam

Naiki Akiyo, Tagane Shuichiro, Chhang Phourin, Van-Son Dang, Toyama Hironori, Nagamasu Hidetoshi, Yahara Tetsukazu

ACTA PHYTOTAXONOMICA ET GEOBOTANICA   68 ( 2 ) 93 - 100   2017年 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）

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New Distributional Records of the Mycoheterotrophic Sciaphila alba (Triuridaceae), outside the Type Locality (vol 68, pg 123, 2017)

Kenji Suetsugu, Akiyo Naiki, Yayoi Takeuchi, Hironori Toyama, Shuichiro Tagane, Tetsukazu Yahara

ACTA PHYTOTAXONOMICA ET GEOBOTANICA ( JAPANESE SOC PLANT SYSTEMATICS, UNIV TOKYO, GRADUATE SCH )  68 ( 3 ) 204 - 204   2017年 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）

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Two New Taxa and One New Report of <i>Tarenna </i>(Rubiaceae) for the Flora of Cambodia and Vietnam

Naiki Akiyo, Tagane Shuichiro, Chhang Phourin, Dang Van-Son, Toyama Hironori, Nagamasu Hidetoshi, Yahara Tetsukazu

Acta Phytotaxonomica et Geobotanica ( 日本植物分類学会 )  68 ( 2 ) 93 - 100   2017年 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）

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A new species, <i>Tarenna aurantiaca </i>Naiki & Tagane (Rubiaceae) from Hon Ba Nature Reserve, southern Vietnam, and a new variety <i>T. pilosa </i>var. <i>parvifolia </i>Naiki & Tagane from Bokor Nature Reserve, southern Cambodia, are described and illustrated. <i>Tarenna costata </i>(Miq.) Merr. is reported for the first time for the flora of Cambodia. A key to the species of <i>Tarenna </i>in Indochina, including Cambodia, Laos and Vietnam, is provided.

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New Localities and Flower Morphology for <i>Lasianthus giganteus </i>(Rubiaceae)

Naiki Akiyo, Tagane Shuichiro, Ngoc Nguyen Van, Toyama Hironori, Yahara Tetsukazu

Acta Phytotaxonomica et Geobotanica ( 日本植物分類学会 )  68 ( 1 ) 59 - 62   2017年 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）

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<i>Lasianthus giganteus </i>Naiki (Rubiaceae), first found in Cambodia, was recently discovered in central Vietnam and southern Thailand. We describe the floral morphology of this species for the first time.

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