广西植物2025，Vol.45Issue(5)：872-885,14.DOI:10.11931/guihaia.gxzw202405005
13种溲疏属植物的花粉形态与分类研究
Pollen morphological and taxonomic study on 13 Deutzia plants
摘要
Abstract
This study aimed to investigate taxonomic significance of pollen morphology and clarify phylogenetic relationship of Deutzia.The pollen morphological characteristics including pollen shape and size,exine ornamentation and colpus of six species,one variety and six cultivars in Deutzia(following abbreviated as 13 Deutzia plants)were observed by scanning electron microscope(SEM),and principal component analysis(PCA)and cluster analysis were conducted on the quantitive characteristric of pollen.The results were as follows:(1)The pollen of 13 Deutzia plants was highly conserved.The observed pollen of 13 Deutzia plants were prolate or perprolate,with medium-sized and small pollen accounting for 23.08%and 76.92%,respectively.The polar view of the pollen was tricoplate with a circular amb,and equatorial view was oblong or oval.The pollen exine ornamentation of 13 Deutzia plants was all rough reticulate type.The pollen size such as polar and equatorial axis length,colpus length and lumina characteristics varied significantly among species and cultivars.D.parviflora was the only species with irregularly lumina and protuberant mesh.A large number of wrinkles and irregular deformities were observed in six cultivars,which could be due to incomplete development of pollen.(2)Three principal component factors were selected by PCA,including pollen size,mesh ridge width and ditch width.When the Euclidean mean distance was 15,13 Deutzia plants could be divided into four types.Among six species and one variety,D.discolor,D.ningpoensis,D.parviflora and D.grandiflora were closely related;D.calycosa var.calycosa and D.calycosa var.xerophyta were closely related.In contrast,D.crassidentata was distantly related to the first six species.Among six cultivars,D.gracilis'Nikko',Deutzia×magnifica'Toubillon'and Deutzia×hybrida'Strawberry Fields'were closely related.Deutzia×rosea'Yuki Snowflake',Deutzia×rosea'Yuki Cherry Blossom'and Deutzia×rosea'Campanulata'were closely related.Cluster analysis results support the view that sect.Mesodeutzia and sect.Deutzia should be separated.(3)Deutzia was presumed to be a relatively late-diverging group in Hydrangeaceae.This is the first report of pollen characteristics of four species,one variety and six cultivars except for D.ningpoensis and D.discolor,and the results of this study provide important evidence to the classification and phylogenetic relationship analysis of Deutzia.关键词
溲疏属/花粉形态/扫描电镜/聚类分析/亲缘关系Key words
Deutzia/pollen morphology/scanning electron microscope/cluster analysis/phylogenetic relationship分类
生物学引用本文复制引用
顾亚男,胡晓雨,李爱民,杨玉洁,蒋凭宏,文书生..13种溲疏属植物的花粉形态与分类研究[J].广西植物,2025,45(5):872-885,14.基金项目
江苏省自然科学基金青年项目(BK20180771) （BK20180771）
江苏高校优势学科建设工程项目(PAPD) （PAPD）
南京林业大学大学生创新训练计划项目(2023NFUSPITP0426). （2023NFUSPITP0426）
