“国内最新科研成果”系列之2021年第六期
New Research Results from Chinain2021（6）
金璇，凌少军，温放，任明迅
Jin Xuan，Ling Shao-Jun，Wen Fang &Ren Ming-Xun
广义马铃苣苔属的生物地理格局与花部演化
Biogeographical patterns and floral evolution ofOreocharis (Gesneriaceae)
植物科学学报2021,39(4):379-388
Plant scicence2021,39(4):379-388
摘要
本文系统总结了广义马铃苣苔属(Oreocharis) 的地理分布范围和花部特征，利用核基因ITS1、ITS2 和叶绿体基因trnL-trnF重建广义马铃苣苔属主要物种的分子系统关系，并结合花部特征和地理分布特点分析花部特征的适应性与演化规率。结果显示：广义马铃苣苔属可分为两个支系，一个支系主要分布于中国西南地区，以黄色花冠、雄蕊4为主；另一个支系则集中分布于中国南部与东南部区域，以紫色花冠为主，并出现了雄蕊2的特化类群。广义马铃苣苔属花冠发生了两侧对称向辐射对称的演化。海南岛分布的所有4个物种都是该岛的特有种，来源于一个共同祖先（可能是花冠亮黄色、花辐射对称），后期逐渐出现花冠橙红色、两侧对称等性状。高山深谷的地理隔离作用、不同生境的隔离作用以及以不同蜂类传粉者类群的趋异选择是马铃苣苔属物种花部特征多样性演化的主要原因。
原文链接：①
②http://www.plantscience.cn（说明：待本文纸质版出版后即可在官网上搜索下载）
③DOI: 10.11913/PSJ.2095－0837.2021.40379
ABSTRACT
We examined the geographical distribution ranges and floral traits of Oreocharis and used nuclear ITS1，ITS2 and chloroplast trnL-trnFsequences of 58 Oreocharisspecies to construct a phylogenetic tree．We then analyzed the adaptation and evolution of floral traits based on the above data．Results showed the Oreochariscould be separated into two clades． Clade A was mainly distributed in Southwest China and predominantly showed yellow corollas with four stamens; Clade B was mainly distributed in South and Southeast China and predominantly showed purple corollas，with several species evolving two stamens． Corolla evolution from zygomorphy to actinomorphy was also detected． All four Hainan－endemic Oreocharis taxa originated from a common ancestor with bright yellow and radial corollas，later evolving orange and bilateral corollas．Geographical isolation，soil heterogeneity，and divergent selection on diverse bee pollinators were identified as key factors in the evolution and diversity of floral traits in Oreocharis．
Original article link: ①
②http://www.plantscience.cn（说明：待本文纸质版出版后即可在官网上搜索下载）
③DOI: 10.11913/PSJ.2095－0837.2021.40379
Fig. 1 Geographical distribution patterns of Oreocharis
Fig. 2 Species diversity of Oreocharis in different regions
Fig. 3 Floral shapes and percentages of Oreocharis
Fig. 4 Main floral traits of Oreocharis
Fig. 5 Stamen traits of Oreocharis
Fig. 6 Phylogenetic tree of Oreocharisbased on ITS1，ITS2 and trnL-trnFsequences
马铃苣苔属植物欣赏
Some beautifulOreochariss.l. plants
