云南樟科植物一新种--华樟  

Cinnamomum huarum(Lauraceae):A new species from Yunnan of China

作　　者：李园园 武力 吴涛 李贵祥 袁玉川 柴勇 LI Yuanyuan;WU Li;WU Tao;LI Guixiang;YUAN Yuchuan;CHAI Yong(Yunnan Academy of Forestry and Grassland,Kunming 650201,China;Yunnan Key Laboratory of Biodiversity of Gaoligong Mountain,Kunming 650201,China;Gaoligong Mountain Forest Ecosystem Observation and Research Station of Yunnan Province,Kunming 650201,China;Nanjian administration and Protection Bureau of Yunnan Wuliangshan National Nature Reserve,Dali,Yunnan 675700,China)

机构地区：[1]云南省林业和草原科学院,昆明650201 [2]云南省高黎贡山生物多样性重点实验室,昆明650201 [3]高黎贡山森林生态系统云南省野外科学观测研究站,昆明650201 [4]云南无量山国家级自然保护区南涧管护局,云南大理675700

出　　处：《西北植物学报》2024年第10期1665-1672,共8页Acta Botanica Boreali-Occidentalia Sinica

基　　金：云南省极小种群野生植物拯救保护专项(2022SJ07X-01);云南省中青年学术和技术带头人后备人才项目(202205AC160041)。

摘　　要：【目的】研究确定及报道在中国云南省南涧县发现的樟科桂属植物一新种--—华樟(Cinnamomumhua-rumY.Chai&YuanY.Li)。【方法】通过形态比较及与近缘种基于叶绿体基因组数据的分子系统学研究证实该种为新分类群。【结果】该种与同属的茶果樟(C.chago)形态相似,均为羽状脉,叶对生或近对生,具长尾尖,但该种小枝被微柔毛,顶芽密被毛,叶背灰白色,被微柔毛,边缘具波状起伏,果实厚扁球形,二者具明显区别。该种的叶绿体基因组大小为154078bp,比茶果樟长1325bp,比同属的刀把木(C.pittosporoides)长1348bp,在反向重复区比茶果樟及刀把木都多了1个678bp的片段;在36种樟科植物构建的系统发育进化树中,该种与刀把木和其他物种形成3个独立的平行分支,且形态与茶果樟近似,表明该种可能是桂属新的进化单元。【结论】形态学特征及叶绿体基因组分析结果支持该种为独立的物种。[Objective]The study aims to identify and describe a new species Cinnamomum huarum(Lauraceae),which was collected from Nanjian,Yunnan of China.[Methods]This species was confirmed as a new taxa by morphological comparison with morphologically similar species and molecular phylogenetic study based on chloroplast genome data.[Results]The new species was similar to C.chago:Pinnately veined,leaves opposite or subopposite,long acumen,branchlets sparsely puberulent,terminal bud densely pubescent,leaf blade gray white abaxially and puberulent,margin undulate and fruit oblate.The chloroplast genome size of this species was 154078 bp,which was 1325 bp longer than C.chago and 1348 bp longer than C.pittosporoides,having an extra 678 bp fragment in the inverted repeat region compared to C.chago and C.pittosporoides.In the phylogenetic tree constructed with whole chloroplast genome of 36 Lauraceae species,C.huarum formed an independent parallel branch with C.pittosporoides and other species.[Conclusion]Both the morphological and phylogenetic research indicate that C.huarum is a dis-tinct species.

关 键 词：分类学 桂属 新分类群 叶绿体基因组 

分 类 号：Q949[生物学—植物学]