ISSN:
1615-6110
Schlagwort(e):
Angiosperms
;
dicotyledons
;
Polygonaceae
;
Polygonum
;
Crystals
;
extrafloral nectaries
;
leaf anatomy
;
secretory structures
;
stomata
;
subepidermal fibers
;
trichomes
Quelle:
Springer Online Journal Archives 1860-2000
Thema:
Biologie
Notizen:
Abstract Several anatomical characters in leaves were described, and their distribution determined, for 153 species ofPolygonum, mostly from herbarium specimens. Structures surveyed were epidermal (glandular and nonglandular trichomes, nodules, specialized parenchyma, stomatal apparatus) and internal (cavities, crystals, laticifer-like cells, nodules, subepidermal fibers). Cleared leaves were supplemented by resin-embedded sections and SEM preparations of selected species. No feature defines any taxonomic section, but some features occur only within one section. Laticifer-like cells, epidermal and internal nodules, resin cups, and unique epidermal and subepidermal cavities seem to be unknown elsewhere; other features (invaginated epidermal cells; enlarged crystal cells confined to paraveinal layer) are rare among angiosperms.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1007/BF00941415
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