广西植物2026，Vol.46Issue(2)：299-310,12.DOI:10.11931/guihaia.gxzw202503009
大吊竹和流苏梨藤竹分子辅助鉴定及形态补充描述
Molecular-assisted identification and complementary morphological description of Melocalamus scandens and M.compactiflorus var.fimbriatus(Bambusoideae)
摘要
Abstract
Complete morphological characteristics are important basis for species classification.Melocalamus scandens Hsueh & C.M.Hui and M.compactiflorus var.fimbriatus(Hsueh & C.M.Hui)D.Z.Li & Z.H.Guo are two species endemic to Yunnan.Currently,the morphological description of reproductive organs of M.scandens has not yet been reported,and based on field surveys and literature review,we found that the description of reproductive organs of the two bamboo species was incomplete in the original literature.Based on extensive field surveys,the super-barcodes plastid genomes and nuclear ribosomal DNA(nrDNA)sequences were exploited to reconstruct phylogenetic trees,so that the identities of individuals collected in the field could be confirmed.On this basis,characteristics of the reproductive organs of M.scandens were supplemented,and the features of the culm leaf ligule,and foliage leaf auricle and ligule were refined.Morphological information of the culm leaf auricle,and foliage leaf auricle and ligule of M.compactiflorus var.fimbriatus were supplemented.The results were as follows:(1)Phylogenetic analysis based on nrDNA sequences indicated that M.scandens and M.compactiflorus var.fimbriatus formed monophyletic clades with high support value,respectively;whereas in the plastid genome phylogenetic tree,the individuals of these two species were polyphyletic,possibly due to incomplete lineage sorting in this group.(2)Supplementary description of M.scandens:culm leaf ligules entire or dentate;foliage leaf auricles tiny or absent,oral setae present;upper margin of foliage leaf ligule ciliate;pseudospikelets clustered on nodes;florets 4-6 with the apex one sterile;glumes 2-4;lemma glabrous,15-veined;palea slightly bifid apically,2-keeled,keels with white cilia;lodicules 3;stamens 6;ovary ovate,style 1,stigmas 3,white,plumose.(3)Complementary description of M.compactiflorus var.fimbriatus:culm leaf auricles linear or absent;ligules conspicuous,margin long fimbriate;foliage leaf auricles linear or absent;ligules conspicuous,margins dentate when fimbriae deciduous later.The study confirms that the feasibility of comprehensively utilizing plastid genomes and nrDNA sequences for species identification in the genus Melocalamus.The supplementary descriptions of inflorescence and vegetative organ morphology provide a more comprehensive taxonomic basis for the accurate identification of M.scandens and M.compactiflorus var.fimbriatus.关键词
大吊竹/流苏梨藤竹/花序特征/营养体特征/补充描述/超级条形码Key words
Melocalamus scandens/M.compactiflorus var.fimbriatus/inflorescence characteristics/vegetative characteristics/complementary description/super-barcode分类
农业科技引用本文复制引用
和顺顺,李诚,张超,张玉霄..大吊竹和流苏梨藤竹分子辅助鉴定及形态补充描述[J].广西植物,2026,46(2):299-310,12.基金项目
国家自然科学基金地区基金(32260098) （32260098）
云南省高层次人才培养支持项目(YNWR-QNBJ-2019-148). （YNWR-QNBJ-2019-148）
