Premium
Oil reservoirs in stem, rhizome, and root of Solidago canadensis (Asteraceae, tribe Astereae)
Author(s) -
Curtis John D.,
Lersten Nels R.
Publication year - 1990
Publication title -
nordic journal of botany
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.333
H-Index - 33
eISSN - 1756-1051
pISSN - 0107-055X
DOI - 10.1111/j.1756-1051.1990.tb01787.x
Subject(s) - rhizome , asteraceae , biology , solidago canadensis , botany , pith , essential oil , invasive species
The anatomy of internal secretory spaces in immature and mature aerial stems, rhizomes, and roots of common goldenrod, Solidago canadensis (Asteraceae, tribe Astereae), was studied from resin‐embedded samples cut 1–2 μm thick. Oil‐filled cavities of different lengths, each lined by a uniseriate epithelium, form in young stems and rhizomes. Epithelial cells enlarge and elongate, and some continue to divide mitotically. The cavities thereby expand and accommodate themselves to the growing stem and rhizome. Septa are sometimes forced open by this enlargement, which merges adjacent cavities. Oil reservoirs in roots are probably also cavities, but their lack of densely cytoplasmic epithelial cells prevented us from locating the end walls. Cavities in stem, root, and the cortex of rhizomes occur only as one median file located just outside of each phloem strand; in the pith of rhizomes, however, several files of cavities of larger diameter seem randomly distributed. This study extends our earlier findings that the oil reservoirs in leaves of this species are cavities; we have therefore verified that cavities, not ducts, permeate the goldenrod plant.