Ovuliferous scale anatomy of Pinus species and its value for classification above the species level

Abstract Anatomy of ovuliferous scales was compared among 20 extant Pinus spp. including representatives of subsections Strobus (section Quinquefoliae, subgenus Strobus), Pinaster and Pinus (section Pinus, subgenus Pinus) and Australes and Contortae (section Trifoliae, subgenus Pinus). Vascular bund...

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Bibliographic Details
Published inBotanical journal of the Linnean Society Vol. 183; no. 4; pp. 633 - 643
Main Authors Yamada, Mariko, Yamada, Toshihiro
Format Journal Article
LanguageEnglish
Published UK Oxford University Press 01.04.2017
Subjects
Anatomy
Bundles
Bundling
Canals
Canals (anatomy)
Classification
Epithelial cells
Pine trees
Pinus
Plant structures
Resins
Species
Species classification
Xylem
Pinaceae
anatomy
.
ovulate cone
ovuliferous scale
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Summary:Abstract Anatomy of ovuliferous scales was compared among 20 extant Pinus spp. including representatives of subsections Strobus (section Quinquefoliae, subgenus Strobus), Pinaster and Pinus (section Pinus, subgenus Pinus) and Australes and Contortae (section Trifoliae, subgenus Pinus). Vascular bundles were arranged in one and two rows in species of subgenera Pinus and Strobus, respectively. Vascular bundles tended to be circular in a cross section, and resin canals were fringed by double concentric rows of sclerified cells in species of subsection Pinus. In contrast, vascular bundles were reniform to oblong and epithelial cells of resin canals were not sclerified in species of other sections. In subsection Pinus, P. taiwanensis, P. hwangshanensis, P. luchuensis and P. thunbergii form a clade that lacks distinct rays in the secondary xylem. These anatomical characters could be used for classification at the above-the-species level.
ISSN:0024-4074
1095-8339
DOI:10.1093/botlinnean/box006