Polystichum speluncicola sp. nov. (sect. Haplopolystichum, Dryopteridaceae) Based on Morphological, Palynological, and Molecular Evidence with Reference to the Non-Monophyly of Cyrtogonellum

Zhang, Libing; He, Hai

doi:10.1600/036364410790862605

Cited by 15 publications

(8 citation statements)

References 15 publications

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“…Sequences of poor quality were excluded if more than one accession per taxon was available. Phylogenetic reconstruction of this data was compared with published phylogenies of polystichoid ferns [27][28][29][30][31][32][33][34][35][36] to highlight any conflicts in the phylogenetic relationships observed. Comparisons were specifically made between our results and the consensus tree provided at the Polystichum website (http://www.uvm.edu/∼dbarring/polystichum.htm).…”

Section: Methodsmentioning

confidence: 99%

“…To address these questions, we assessed the reported occurrence of apomixis across ferns and reconstructed the evolution of apomixis in polystichoid ferns. The latter are an outstanding example given our knowledge on the phylogeny of this species-rich lineage of derived ferns [27][28][29][30][31][32][33][34][35][36], including the various reports on reticulate evolution and polyploidy [37], and reports on the reproductive biology of these ferns showing a range of modes from obligate outcrossing to apomixis [34,38,39]. It has been suggested that apomixis may be restricted to three lineages of polystichoid ferns which all have their putative origin in SE Asia [34].…”

Section: Introductionmentioning

confidence: 99%

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The Evolutionary Dynamics of Apomixis in Ferns: A Case Study from Polystichoid Ferns

Dyer

Guo

et al. 2012

Journal of Botany

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The disparate distribution of apomixis between the major plant lineages is arguably one of the most paradoxical phenomena in plant evolution. Ferns are particularly interesting for addressing this issue because apomixis is more frequent than in any other group of plants. Here, we use a phylogenetic framework to explore some aspects of the evolution of apomixis in ferns and in particular in the polystichoid ferns. Our findings indicate that apomixis evolved several times independently in three different clades of polystichoid ferns. A lineage-wide perspective across ferns indicates a correlation between apomixis and the species richness of lineages; however BiSSE tests did not recover evidence for a correlation of apomixis and diversification rates. Instead, evidence was recovered supporting an association between the establishment of apomixis and reticulate evolution, especially in the establishment of triploid hybrids. Diversification time estimates supported the hypothesis of short living apomictic lineages and indicated a link between the establishment of apomixis and the strengthening of the monsoons caused by the lifting of the Qinghai-Tibetan plateau. In general our results supported the hypothesis for the rare establishment of apomictic lineages, high extinction risks, and low speciation rates.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The Evolutionary Dynamics of Apomixis in Ferns: A Case Study from Polystichoid Ferns

Dyer

Guo

et al. 2012

Journal of Botany

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“…The other species are P. balansae Christ (1908: 193) and P. scariosum (Roxburgh) Morton (1974: 359). Until recently (Zhang 2012), Polystichum balansae was placed in Cyrtomium C.Presl (Shing 1965: 16, Kung 2001, but molecular studies have unambiguously placed these species in Polystichum (Lu et al 2007, Li et al 2008, Zhang & He 2010, 2012. Polystichum scariosum was often misidentified as P. eximium (Mettenius ex Kuhn) Christensen (1933: 8) [= P. anomalum (Hook.…”

Section: Discussionmentioning

confidence: 99%

Polystichum hainanicola (Dryopteridaceae), a new fern species from Hainan Island, China

Zhang¹,

Gao²,

Zhang³

2013

Phytotaxa

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A new fern species, Polystichum hainanicola belonging to section Haplopolystichum (Dryopteridaceae), is described and illustrated from Hainan, the southernmost province of China. Polystichum hainanicola is most similar to P. guangxiense, but the former has pinnae with a length to width ratio of 2.5-2.7, lamina completely fertile and sori fewer than four above midrib of middle pinnae. In contrast, the latter has pinnae with a length to width ratio of ca. 3:1, lamina sterile in its lower portion and sori 6-11 above midrib of middle pinnae.

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“…Haplopolystichum in Ha Giang Province: P. fraxinellum, P. minimum, and P. tenuius (Ching) Zhang (2012: 59). The latter three species were traditionally placed in the genus Cyrtogonellum Ching (1938;Hsieh 2001), which is now a section in Polystichum (Zhang & Barrington 2013: 678) because Cyrtogonellum is unambiguously resolved as part of Polystichum based on molecular data (Li et al 2008, Liu et al 2010, Zhang & He 2010. Polystichum minimum used to be called Cyrtogonellum inaequale (Christ) Ching (1938: 331), while P. tenuius replaces C. caducum Ching (1938: 330).…”

Section: Taxonomymentioning

confidence: 99%

Polystichum hagiangense (subg. Haplopolystichum; Dryopteridaceae), a new fern species from Ha Giang Province, northern Vietnam

Zhang

2014

Phytotaxa

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A new fern species, Polystichum hagiangense belonging to P. subg. Haplopolystichum (Dryopteridaceae), is described and illustrated from Ha Giang Province in northern Vietnam. Polystichum hagiangense is most similar to P. minutissimum by having a small habit (lamina 3.6–5.8 × 1.0–1.6 cm), but the former has the widest part of the lamina close to the base and ovate and larger pinnae (5.3–8.2 × 3.2–5.8 mm). In contrast, the latter has the widest part of the lamina above the middle and nearly rectangular and smaller pinnae (2.9−5.8 × 2.8−4.5 mm). Also, the two species have different ecological requirements. Polystichum hagiangense was found on limestone cliffs in forest at an elevation of 1290 m with dry and light conditions, while P. minutissimum grows on dripping limestone walls and stalactites inside a karst cave at an elevation of 750 m with humid and shady conditions. Polystichum hagiangense is currently known only from a single population occurring at Bat Dai Son community in Ha Giang Province, northern Vietnam, and would be classified as Critically Endangered (CR), following IUCN Red List criteria.

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Polystichum speluncicola sp. nov. (sect. Haplopolystichum, Dryopteridaceae) Based on Morphological, Palynological, and Molecular Evidence with Reference to the Non-Monophyly of Cyrtogonellum

Cited by 15 publications

References 15 publications

The Evolutionary Dynamics of Apomixis in Ferns: A Case Study from Polystichoid Ferns

The Evolutionary Dynamics of Apomixis in Ferns: A Case Study from Polystichoid Ferns

<i>Polystichum hainanicola</i> (Dryopteridaceae), a new fern species from Hainan Island, China

Polystichum hagiangense (subg. Haplopolystichum; Dryopteridaceae), a new fern species from Ha Giang Province, northern Vietnam

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