Systematic position of Oreosolen （tribe Scrophularieae, Scrophulariaceae） based on nuclear and plastid sequences  

作　　者：Chuan Chen Min-Qi Cai Bo Xu Xin-Jie Jin Rui-Hong Wang Pan Li Yun-Peng Zhao Cheng-Xin Fu 

机构地区：[1]Key Laboratory of Conservation Biology for Endangered Wildlife of the Ministry of Education, and Laboratory of Systematic and EvolutionaryBotany and Biodiversity, College of Life Sciences, Zhejiang University, Hangzhou 310058, China [2]Hangzhou Botanical Garden (Hangzhou Research Institute of Garden Science), Hangzhou 310013, China [3]College of Forestry, Southwest Forestry University, Kunming 650204, China [4]Zhejiang Province Key Laboratory of Plant Secondary Metabolism and Regulation, College of Life Sciences, Zhejiang Sci-Tech University,Hangzhou 310018, China

出　　处：《Journal of Systematics and Evolution》2017年第5期446-452,共7页植物分类学报（英文版）

摘　　要：The genera Oreosolen and Scrophularia （Scrophulariaceae） were assumed to be closely related due to the considerable similarity in morphology. Their sister relationship was even suggested in a few molecular phylogenetic studies. However, this proposed relationship is not so convincing due to insufficient sampling of Scrophularia. In this study, the systematic position of Oreosolen was reassessed based on more sampling of both taxa and molecular traits. A total of lo4 accessions representing 89 taxa were sampled, including 87 （85 taxa） of Scrophularia, 14 （one taxon） of Oreosolen, and three outgroups. The phylogenetic relationships between Oreosolen and Scrophularia were inferred based on one nuclear （internal transcribed spacer） and three plastid （trnL-F, psbA-trnH, and trnQ-rps16） DNA regions using maximum parsimony, maximum likelihood, and Bayesian inference methods. The results revealed that Oreosolen was nested within Scrophularia and thus its generic status was not supported. Its type species, Oreosolen wattii Hook. f., was then transferred to Scrophularia and a new combination （Scrophularia wattii （Hook. f.） P. Li） was proposed. Oreosolen and its sympatric ally, Phlomoides rotata （Benth. ex Hook. f.） Mathiesen （= Lamiophlomis rotata （Benth. ex Hook. f.） Kudo, Lamiaceae）, might undergo convergent evolution of acaulescence and rosulate leaves driven by the harsh alpine environment.The genera Oreosolen and Scrophularia （Scrophulariaceae） were assumed to be closely related due to the considerable similarity in morphology. Their sister relationship was even suggested in a few molecular phylogenetic studies. However, this proposed relationship is not so convincing due to insufficient sampling of Scrophularia. In this study, the systematic position of Oreosolen was reassessed based on more sampling of both taxa and molecular traits. A total of lo4 accessions representing 89 taxa were sampled, including 87 （85 taxa） of Scrophularia, 14 （one taxon） of Oreosolen, and three outgroups. The phylogenetic relationships between Oreosolen and Scrophularia were inferred based on one nuclear （internal transcribed spacer） and three plastid （trnL-F, psbA-trnH, and trnQ-rps16） DNA regions using maximum parsimony, maximum likelihood, and Bayesian inference methods. The results revealed that Oreosolen was nested within Scrophularia and thus its generic status was not supported. Its type species, Oreosolen wattii Hook. f., was then transferred to Scrophularia and a new combination （Scrophularia wattii （Hook. f.） P. Li） was proposed. Oreosolen and its sympatric ally, Phlomoides rotata （Benth. ex Hook. f.） Mathiesen （= Lamiophlomis rotata （Benth. ex Hook. f.） Kudo, Lamiaceae）, might undergo convergent evolution of acaulescence and rosulate leaves driven by the harsh alpine environment.

关 键 词：alpine plants convergent evolution new combination and synonym Oreosolen PHYLOGENY Scrophularia. 

分 类 号：Q949.32[生物学—植物学] Q949.777.8