Habitat and Reproductive Isolation as Factors in Speciation between Liliun longiflorum Thunb. and L. formosanum Wallace.

Hiramatsu, Michikazu; Okubo, Hiroshi; Huang, Kuang Liang; Huang, Chi Wei; Yoshimura, Kiyomi

doi:10.2503/jjshs.70.722

Cited by 3 publications

(2 citation statements)

References 2 publications

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“…z Not examined y According to Hiramatsu et al (2001b) are detected. To reduce the number of peaks and obtain clear fingerprints, we used the extended preselective and selective primers and α-type DNA polymerase with 3'-5' exonuclease activity.…”

Section: Seed Productionmentioning

confidence: 99%

“…Lilium formosanum, a selfcompatible species genetically closely related to L. longiflorum (Nishikawa et al, 1999), is also native to the mainland of Taiwan (Shii, 1983). It is possible to distinguish these species by leaf morphology, flowering time, and habitat (Hiramatsu et al, 2001b). Hiramatsu et al (2001a) suggested that L. formosanum is a derivative of L. longiflorum populations at the southern edge of the species distribution based on the data from allozyme diversity.…”

Section: Introductionmentioning

confidence: 99%

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Phylogenetic Relationship between Degree of Self-compatibility and Floral Traits in Lilium longiflorum Thunb. (Liliaceae)

Sakazono

Hiramatsu

Huang

et al. 2012

J. Japan. Soc. Hort. Sci.

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Lilium longiflorum is endemic to the islands of the Ryukyu Archipelago in Japan and to the eastern seacoasts and satellite islands of the mainland of Taiwan. The species is an important ornamental plant, and is cultivated throughout the world. Lilium longiflorum has long been regarded as a self-incompatible species but the existence of selfing in some natural populations was suggested by isozyme analysis in a previous study. To confirm the occurrence of self-compatible individuals and to clarify the evolutionary shift of floral traits associated with degree of self-compatibility in L. longiflorum by comparative analysis, we used 17 populations of L. longiflorum, and two populations of L. formosanum, the genetically closest species of L. longiflorum, covering the entire species distribution. Artificial self-pollination revealed that not all L. longiflorum individuals are self-incompatible and there is substantial quantitative variation of self-incompatibility among L. longiflorum individuals and populations. Self-compatible dominant populations allopatrically and independently evolved at the periphery of the species distribution area, the northern Ryukyu Archipelago and Taiwan. Increasing degree of selfcompatibility in L. longiflorum correlated with reduced corolla length, corolla width, corolla volume, and anther length for the Ryukyu Archipelago, in contrast to only reduced corolla width and volume for Taiwan. Approach between anther and stigma was not observed in any populations. Our data indicate that in the Ryukyu Archipelago increasing degree of self-compatibility evolved floral traits related to mating system evolution, to selfing, that does not depend on adjacency between anther and stigma position, but not in Taiwan.

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Section: Seed Productionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Phylogenetic Relationship between Degree of Self-compatibility and Floral Traits in Lilium longiflorum Thunb. (Liliaceae)

Sakazono

Hiramatsu

Huang

et al. 2012

J. Japan. Soc. Hort. Sci.

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Floral biology of Hemigenia and Microcorys (Lamiaceae)

Guerin¹

2005

Aust. J. Bot.

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The floral morphology and pollination of Hemigenia R.Br. and Microcorys R.Br. (Lamiaceae) were examined in the field and laboratory. The protandrous flowers have tubular, two-lipped corollas. Nine floral morphotypes are described. The stamens may be completely sterile (staminodal) or have one theca reduced or absent. The anthers typically have elongated connective tissue and are mobile on the filament. When the lower end of the anther is pushed, the upper end is levered towards the mouth of the corolla tube, hence dusting the pollinator precisely where receptive stigmas will later touch. Bearding on the anthers of the adaxial stamens catches adjacent anthers so that they lever in unison. Staminodes guide insect pollinators into the throat to allow precise pollen dusting. Detailed field observations show that bees and flies are the principle pollinators of most species. Floral morphologies are related to pollinator castes, and reproductive isolation and efficiency is enhanced by precise pollen deposition. Bird pollination is likely to have arisen independently in several taxa. The floral arrangement of these taxa is superficially similar but the syndrome is achieved through different anatomy.

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Variation of Dormancy and Early Flowering Ability in Lilium longiflorum and L. formosanum Populations in the Ryukyu Archipelago and Taiwan

Mojtahedi

Masuda

Hiramatsu

et al. 2013

J. Japan. Soc. Hort. Sci.

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Variations in the dormancy and early flowering ability of seedlings of four populations of Lilium longiflorum, Yaku Shima (LYA), Kikai Jima (LKI), and Ishigaki Jima (LIS) in the Ryukyu Archipelago, Japan and Pitouchiao (LPI), Taiwan, and two populations of L. formosanum, Wulai (FWU), Taiwan and a domesticated Fukuoka population (FFU), Japan were investigated. Seedlings of each population were grown at 15°C for five months. They were then transplanted into an experimental open field for two years or at 15, 20, 25, and 30°C under natural day length for 22 weeks. In the field experiments, FWU, FFU, and LPI populations continued to develop new leaves even at >30°C. Flowering percentage for FFU and LPI was 90% and 19.7%, respectively. Leaf development of LIS, LKI, and LYA was completely arrested from early June in both years, and the flowering percentages were 28, 25, and, 10 in the second year, respectively. Under controlled temperature conditions, LKI and LYA populations produced new leaves only at 15°C. FFU and LPI continued growing at 25 and 30°C, whereas the other populations did not grow. FFU significantly produced the heaviest leaves and bulbs and the highest number of scales per bulb at any temperature. The results showed that high temperature induces bulb dormancy in northern L. longiflorum. Strong correlation with the early flowering ability and bulb dormancy was also found. It seems that the early flowering ability of L. formosanum is largely dependent on the lack or reduction of bulb dormancy after adaptation to the local southern climate. The latitudinal variation of this trait demonstrated the geographic gradient during species habituation in the Ryukyu Archipelago.

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Habitat and Reproductive Isolation as Factors in Speciation between Liliun longiflorum Thunb. and L. formosanum Wallace.

Cited by 3 publications

References 2 publications

Phylogenetic Relationship between Degree of Self-compatibility and Floral Traits in Lilium longiflorum Thunb. (Liliaceae)

Phylogenetic Relationship between Degree of Self-compatibility and Floral Traits in Lilium longiflorum Thunb. (Liliaceae)

Floral biology of Hemigenia and Microcorys (Lamiaceae)

Variation of Dormancy and Early Flowering Ability in Lilium longiflorum and L. formosanum Populations in the Ryukyu Archipelago and Taiwan

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