A new species of Chrysosplenium (Saxifragaceae) from Zhangjiajie, Hunan, central China

Liu, Hong; Luo, Jin-Long; Liu, Qiu-Yu; Lan, Deqing; Qin, Rui; Yu, Xun‐Lin

doi:10.11646/phytotaxa.277.3.7

Cited by 20 publications

(23 citation statements)

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“… Macrophylla contains five species including C. chinense (Hara) J.T.Pan, C. davidianum Dence. ex Maxim, C. macrophyllum Oliv., C. glossophyllum Hara and a recently-described species C. zhangjiajieense ( Pan 1986a ; Liu et al 2016 ). Amongst them, the new species is most similar to C. macrophyllum and C. zhangjiajieense by stamens long exserted from sepals, but can be distinguished based on plant height, rhizome, stolon, sterile branch, basal leaf, flower colour and stamen morphology as summarised in Table 1 .…”

Section: Taxonomic Treatmentmentioning

confidence: 99%

“… Macrophylla by leaves all alternate, seed minute papillae, ovary semi-inferior and disc absent ( Pan 1986a , b ). A thorough literature survey ( Pan 1992 ; Pan and Ohba 2001 ; Liu et al 2016 ; Kim et al 2019 ) and review of herbarium specimens at A, E, HNWP, HZU, IBSC, KUN, MO, NEFI, NWTC, PE, SI, WUK (herbarium acronyms according to Index Herbariorum; Thiers 2019 ), suggested that it is a distinct and undescribed species.…”

Section: Introductionmentioning

confidence: 99%

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A new species of Chrysosplenium (Saxifragaceae) from Shaanxi, north-western China

Fu¹,

Liao²,

Lan³

et al. 2020

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Chrysosplenium zhouzhiense Hong Liu, a new species from Shaanxi, north-western China, is described and photographed. The new species belongs to Subgen. Gamosplenium Sect. Nephrophylloides Ser. Macrophylla and is most similar to C. macrophyllum and C. zhangjiajieense from which it differs by having a shorter stem, rhizome absent, basal leaf absent, sterile branch arising from the flowering stem and a light yellow flower with longer stamen. A global conservation assessment is performed and classifies C. zhouzhiense as Endangered (EN).

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Section: Taxonomic Treatmentmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A new species of Chrysosplenium (Saxifragaceae) from Shaanxi, north-western China

Fu¹,

Liao²,

Lan³

et al. 2020

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“…The genus plays an important role in the phylogeny of Saxifragaceae, comprises about 79 perennial herbs [7], and mainly occurs in the northern hemisphere, with the highest species diversity in East Asia; only two species, Chrysosplenium valdivicum Hook and Chrysosplenium macranthum Hook, are found in the Southern Hemisphere [8,9]. Thirty-six species and fifteen variants have been recorded in China [10,11]. Chrysosplenium is divided into two subgenera according to the leaf arrangement: Alternifolia Franchet with alternate leaves and Oppositifolia Franchet with opposite leaves [8,10,12].…”

Section: Introductionmentioning

confidence: 99%

Analysis of six chloroplast genomes provides insight into the evolution of Chrysosplenium (Saxifragaceae)

Wu¹,

Liao²,

Yang³

et al. 2020

BMC Genomics

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Background Chrysosplenium L. (Saxifragaceae) is a genus of plants widely distributed in Northern Hemisphere and usually found in moist, shaded valleys and mountain slopes. This genus is ideal for studying plant adaptation to low light conditions. Although some progress has been made in the systematics and biogeography of Chrysosplenium, its chloroplast genome evolution remains to be investigated. Results To fill this gap, we sequenced the chloroplast genomes of six Chrysosplenium species and analyzed their genome structure, GC content, and nucleotide diversity. Moreover, we performed a phylogenetic analysis and calculated non-synonymous (Ka) /synonymous (Ks) substitution ratios using the combined protein-coding genes of 29 species within Saxifragales and two additional species as outgroups, as well as a pair-wise estimation for each gene within Chrysosplenium. Compared with the outgroups in Saxifragaceae, the six Chrysosplenium chloroplast genomes had lower GC contents; they also had conserved boundary regions and gene contents, as only the rpl32 gene was lost in four of the Chrysosplenium chloroplast genomes. Phylogenetic analyses suggested that the Chrysosplenium separated to two major clades (the opposite group and the alternate group). The selection pressure estimation (Ka/Ks ratios) of genes in the Chrysosplenium species showed that matK and ycf2 were subjected to positive selection. Conclusion This study provides genetic resources for exploring the phylogeny of Chrysosplenium and sheds light on plant adaptation to low light conditions. The lower average GC content and the lacking gene of rpl32 indicated selective pressure in their unique habitats. Different from results previously reported, our selective pressure estimation suggested that the genes related to photosynthesis (such as ycf2) were under positive selection at sites in the coding region.

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“…The genus plays an important role in the phylogeny of Saxifragaceae, comprises about 79 perennial herbs [7], and mainly occurs in the northern hemisphere, with the highest species diversity in East Asia; only two species, Chrysospleniumvaldivicum Hook and Chrysospleniummacranthum Hook, are found in the Southern Hemisphere [8,9]. Thirty-six species and fteen variants have been recorded in China [10,11]. Chrysosplenium is divided into two subgenera according to the leaf arrangement: Alternifolia Franchet with alternate leaves and Oppositifolia Franchet with opposite leaves [8,10,12].…”

Section: Introductionmentioning

confidence: 99%

Analysis of Six Chloroplast Genomes Provides Insight into the Evolution of Chrysosplenium (Saxifragaceae)

Liao

Yang

et al. 2020

Preprint

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Background: Chrysosplenium L. (Saxifragaceae) is a genus of plants widely distributed in Northern Hemisphere and usually found in moist, shaded valleys and mountain slopes. This genus is ideal for studying plant adaptation to low light conditions. Although some progress has been made in the systematics and biogeography of Chrysosplenium, its chloroplast genome evolution remains to be investigated. Results: To fill this gap, we sequenced the chloroplast genomes of six Chrysosplenium species and analyzed their genome structure, GC content, and nucleotide diversity. Moreover, we performed a phylogenetic analysis and calculated non-synonymous (Ka) /synonymous (Ks) substitution ratios using the combined protein-coding genes of 29 species within Saxifragales and two additional species as outgroups, as well as a pair-wise estimation for each gene within Chrysosplenium. Compared with the outgroups in Saxifragaceae, the six Chrysosplenium chloroplast genomes had lower GC contents; they also had conserved boundary regions and gene contents, as only the rpl32 gene was lost in four of the Chrysosplenium chloroplast genomes. Phylogenetic analyses suggested that the Chrysosplenium separated to two major clades (the opposite group and the alternate group). The selection pressure estimation (Ka/Ks ratios) of genes in the Chrysosplenium species showed that matK and ycf2 were subjected to positive selection.Conclusion: This study provides genetic resources for exploring the phylogeny of Chrysosplenium and sheds light on plant adaptation to low light conditions. The lower average GC content and the lacking gene of rpl32 indicated selective pressure in their unique habitats. Different from results previously reported, our selective pressure estimation suggested that the genes related to photosynthesis (such as ycf2) were under positive selection at sites in the coding region.

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A new species of Chrysosplenium (Saxifragaceae) from Zhangjiajie, Hunan, central China

Cited by 20 publications

References 0 publications

A new species of Chrysosplenium (Saxifragaceae) from Shaanxi, north-western China

A new species of Chrysosplenium (Saxifragaceae) from Shaanxi, north-western China

Analysis of six chloroplast genomes provides insight into the evolution of Chrysosplenium (Saxifragaceae)

Analysis of Six Chloroplast Genomes Provides Insight into the Evolution of Chrysosplenium (Saxifragaceae)

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