Smilax ligneoriparia sp. nov.: A link between herbaceous and woody Smilax (Smilacaceae) based on morphology, karyotype and molecular phylogenetic data
Smilax ligneoriparia sp. nov.: A link between herbaceous and woody Smilax (Smilacaceae) based on morphology, karyotype and molecular phylogenetic data
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DOI：
10.1002/tax.604013
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发表时间：
2011-08
期刊：
影响因子：
3.4
通讯作者：
Pan Li;Zhechen Qi;Shichao Chen;K. Cameron;C. Fu
中科院分区：
文献类型：
--
作者：
Pan Li;Zhechen Qi;Shichao Chen;K. Cameron;C. Fu
云南东南部发现的一个菝葜居群，原被认为是菝葜的一个地方小种。riparia具有不寻常的木质，多年生茎，但它作为一个独特的种的地位是支持这里的形态学，核型和分子生物学。本文报道了新种--狭叶菝葜Smilax ligneoripariaC. X. Fu & P. Li与S. riparia的叶片为卵形草质，茎光滑，无刺，但其茎为木质，染色体数目为2n= 32，与S.河岸带（2n= 30）。分子系统发育分析也证实，它是不同的，但暂时支持的立场，这个新的分类群作为姐妹的一个分支的木本亚洲种，这反过来又是姐妹的草本，每年emergentSmilaxclade。植物标本表明S.在云南东南部和浙江南部的至少三个地点都采集到了ligneoripariaL.，但我们怀疑西畴的种群可能是唯一现存的种群，它们产于海拔1550-1600米的石灰岩山坡上。
A population ofSmilaxfound in southeastern Yunnan was originally considered to be a local race ofS. ripariawith unusual woody, perennial stems, but its status as a distinct species is supported here by morphology, karyology, and molecular phylogenetics. This new species,Smilax ligneoripariaC.X. Fu & P. Li, shares several unique morphological characteristics withS. riparia, such as ovate herbaceous leaves and smooth stem lacking prickles, but its stem is "woody" and its chromosome number is 2n= 32, unlike that ofS. riparia(2n= 30). Molecular phylogenetic analysis also confirms that it is distinct, but tentatively supports the position of this new taxon as sister to a clade of woody Asian species, which in turn is sister to the herbaceous, annually emergentSmilaxclade. Herbarium specimens show thatS. ligneoripariahas been collected in at least three locations in southeastern Yunnan and southern Zhejiang Provinces, but we suspect that the population from Xichou, occurring on limestone mountain slopes at 1550–1600 m, may be the only extant population.