Phylogeographic analysis of Saxifraga fortunei complex (Saxifragaceae) reveals multiple origins of morphological and ecological variations in the Japanese Archipelago

Magota, Kana; Sakaguchi, Shota; Lee, Jung-Sim; Yamamoto, Masaya; Takahashi, Daiki; Nagano, Atsushi J.; Setoguchi, Hiroaki

doi:10.1016/j.ympev.2021.107230

Cited by 12 publications

(15 citation statements)

References 94 publications

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“…Saxifraga sect. Irregulares Haw., characterized by asymmetric flowers with two unequally elongated and three short petals, was one of the earliest lineage of Saxifraga to diverge (Magota et al, 2021; Soltis et al, 2001; Tkach et al, 2015; Zhang et al, 2020). It is distributed in eastern Asia, and many species are narrow endemics only known from a few localities.…”

Section: Introductionmentioning

confidence: 99%

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A re‐examination of the circumscription of Saxifraga mengtzeana (Saxifragaceae)

Zhang

Gornall

Zhang

et al. 2023

Ecology and Evolution

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In the Flora of China account of Saxifraga mengtzeana Engl. & Irmsch., eight synonyms were attributed to it and one variant, recognized as Saxifraga epiphylla Gornall & Ohba, was split from it. This study reevaluates the taxonomic status of some of the synonyms and of the segregated species in light of new evidence presented here. Morphological and molecular evidence demonstrate that collections from northwestern Yunnan and Sichuan are genetically differentiated from those in southeastern Yunnan and neighboring Guangxi. Observations in the field and in cultivation show that the peltate petiole attachment diagnostic of S. mengtzeana var. peltifolia Engl. & Irmsch. is developmentally labile. Similar observations combined with molecular data show that viviparous phenotypes, formerly treated as S. epiphylla, although largely under genetic control, occur sporadically throughout the ranges of both northern and southern taxa. Collections from northwestern Yunnan and Sichuan are best recognized as Saxifraga geifolia Balf.f., whereas those from southeastern Yunnan and neighboring Guangxi are S. mengtzeana. Peltate-leaved variants of the latter are given no status and are relegated to complete synonymy. Viviparous phenotypes of S. mengtzeana and S. geifolia are recognized at the rank of forma.

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Section: Introductionmentioning

confidence: 99%

“…It is distributed in eastern Asia, and many species are narrow endemics only known from a few localities. (Magota et al, 2021;Pan et al, 2001). Section Irregulares currently comprises 20 species, including seven recently described from China (14 species in China currently).…”

Section: Introductionmentioning

confidence: 99%

A re‐examination of the circumscription of Saxifraga mengtzeana (Saxifragaceae)

Zhang

Gornall

Zhang

et al. 2023

Ecology and Evolution

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show abstract

“…Saxifraga sect. IrregularesHaw., characterised by aymmetric flowers with two unequally elongated and three short petals, was the earliest lineage of Saxifraga to diverge (Soltis et al, 2001;Tkach et al, 2015;Zhang et al, 2020;Magota et al, 2021). Section Irregulares currently comprises 20 species, including seven recently described from China.…”

Section: Introductionmentioning

confidence: 99%

“…It is distributed in eastern Asia (Wang et al, 2008;Zhang et al 2017;Zhang et al 2018;Zhang et al 2019;Zhao et al 2019;Zhang et al, 2021a;Zhang et al, 2021b;Zhang et al, 2022). Most members are confined to local areas (Pan et al, 2001;Magota et al, 2021). The diversity ofS.…”

Section: Introductionmentioning

confidence: 99%

A re-examination of the circumscription of Saxifraga mengtzeana (Saxifragaceae)

Zhang

Gornall

Zhang

et al. 2022

Preprint

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In the Flora of China account (Pan et al. 2001) of Saxifraga mengtzeana Engl. & Irmsch., eight synonyms were attributed to it and one variant, recognised as S. epiphylla Gornall & Ohba, was split from it. This study re-evaluates the taxonomic status of some of the synonyms and of the segregated species in the light of new evidence presented here. Morphological and molecular evidence demonstrate that populations from north-western Yunnan and Sichuan are genetically differentiated from those in south-eastern Yunnan and neighbouring Guangxi. Observations in the field and in cultivation show that the peltate petiole attachment diagnostic of S. mengtzeana var. peltifolia Engl. & Irmsch. is developmentally labile. Similar observations combined with molecular data show that viviparous phenotypes, formerly treated as S. epiphylla, although largely under genetic control, occur sporadically throughout the ranges of both northern and southern taxa. Populations from north-western Yunnan and Sichuan are best recognised as S. geifolia Balf.f., whereas those from south-eastern Yunnan and neighbouring Guangxi are S. mengtzeana. Peltate-leaved variants of the latter are given no status and are relegated to complete synonymy. Viviparous phenotypes of S. mengtzeana are demoted to the rank of forma, as f. epiphylla; analogous phenotypes of S. geifolia are newly described as f. vivipara. Keywords China, Saxifragaceae, Phylogeny, Morphology, Taxonomy

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“… Irregulares Haw., characterized by zygomorphic flowers with two elongated petals and stamens with club-shaped filaments ( Tkach et al 2015b ), is the ancestral clade of Saxifraga first described by Haworth ( Haworth 1803 ; Soltis et al 2001 ; Zhang et al 2015 ; Tkach et al 2015b ; Zhang et al 2019b ). This section currently comprises 16 species mainly distributed in East Asia ( Magota et al 2021 ).…”

Section: Introductionmentioning

confidence: 99%