A SEM- baased study of the gynoecium in Fritillaria L. (Liliaceae)

The systematic value of stigma, style, and ovary morphology in the subgeneric classification of Fritillaria (Liliaceae) was investigated using scanning electron microscopy (SEM) on ۲۹ taxa. A quantitative and qualitative analysis of gynoecium morphology was conducted across the subgenera Fritillaria, Rhinopetalum, and Petilium. The research methodology involved quantitative measurements of stigma, style, and ovary lengths, complemented by qualitative evaluations of style ornamentation, style apex, style morphology, and ovary morphology. A clustering dendrogram was constructed based on these characters, and a phylogenetic tree was built using a phylogenetic backbone based on the botanical nomenclature of The Plant List in R software and Bray–Curtis dissimilarity. The results showed some correlation between the dendrogram and the phylogenetic tree, indicating the relative usefulness of a clustering dendrogram constructed based on the combined quantitative and qualitative characters. Moreover, phylogenetic analysis of the species was performed using the vascular plant mega-tree and the R package 'phylomaker' to construct a phylogenetic tree. A reference phylogenetic tree was used to evaluate the taxonomic accuracy of the dendrogram, with an assessment based on gynoecium characters. The gynoecium characters within Fritillaria were useful in a few subgenera and had limited significance in the subgeneric classification of the genus.

کلیدواژه ها:

Fritillaria ، gynoecium ، Liliaceae ، OVARY ، SEM ، Stigma ، style