Seed morphology of Hypericum (Hypericaceae) in China and its taxonomic significance.
Hypericeae
Malpighiales
micromorphology
seed surface ornamentation
taxonomy
Journal
Microscopy research and technique
ISSN: 1097-0029
Titre abrégé: Microsc Res Tech
Pays: United States
ID NLM: 9203012
Informations de publication
Date de publication:
Nov 2023
Nov 2023
Historique:
revised:
25
05
2023
received:
01
02
2023
accepted:
08
06
2023
medline:
23
10
2023
pubmed:
21
6
2023
entrez:
21
6
2023
Statut:
ppublish
Résumé
The seed morphology of 40 taxa within the genus Hypericum (Hypericaceae) from China, representing 9 sections of the genus, was examined using both Light and Scanning Electron Microscopy to evaluate the taxonomic relevance of macro- and micro-morphological features. Details articulating variation in seed size, color, shape, appendages, and seed coat ornamentation are described, illustrated, and compared, and their taxonomic importance is discussed. Seeds were generally brown in color and cylindric-ellipsoid to prolonged cylindric in shape. Seed size displayed wide variation, ranging from 0.37-1.91 mm in length and 0.12-0.75 mm in width. Seed appendages were observed as a characteristic morphological feature. Seed surface ornamentation has high phenotypic plasticity, and four types (reticulate, foveolate, papillose, and ribbed) can be recognized. In general, seed color and shape have limited taxonomic significance. However, some other features represent informative characters that can be used efficiently in distinguishing the studied taxa at the section and/or species levels. The findings illustrate that considerable taxonomic knowledge can be obtained by investigating the seed features of Hypericum, and the use of Scanning Electron Microscopy can reveal inconspicuous morphological affinities among species and play a role in taxonomic and systematic studies of the genus Hypericum. RESEARCH HIGHLIGHTS: Macro- and micro-morphological features of seeds of 40 Hypericum taxa from China were examined using Light and Scanning Electron Microscopy, providing the first broad study regarding seed morphology for Hypericum from China. Details and variations of seed size, shape, color, surface ornamentation, and appendages are fully presented. Seed features and their variation have important taxonomic significance at the section and/or species levels within Hypericum.
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
1496-1509Subventions
Organisme : State Key Laboratory of Phytochemistry and Plant Resources in West China
Organisme : The CAS Interdisciplinary Team of the "Light of West China" Program
Organisme : Yunnan Revitalization Talent Support Program "Innovation Team" Project
Informations de copyright
© 2023 Wiley Periodicals LLC.
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