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STOMATA OF ALETHOPTERIS SULLIVANTI: A NEW STOMATAL TYPE AMONG SEED FERNS AND VASCULAR PLANTS
Author(s) -
Stidd Benton M.
Publication year - 1988
Publication title -
american journal of botany
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.218
H-Index - 151
eISSN - 1537-2197
pISSN - 0002-9122
DOI - 10.1002/j.1537-2197.1988.tb13502.x
Subject(s) - guard cell , cuticle (hair) , biology , cell wall , botany , cell type , plant cuticle , plant cell , microbiology and biotechnology , cell , biophysics , anatomy , biochemistry , gene , wax
Observations based on new preparations confirm the presence of four cells in parallel alignment in A. sullivanti stomata but not with two flanking subsidiary cells as in paracytic stomata. Rather, each guard cell contains in its interior a smaller inner cell. The stomatal pore is formed by walls of the larger cells and it is not known what role, if any, the interior cells may have played in opening and closing the pore. This cell‐within‐a‐cell arrangement is unknown among stornata elsewhere in the plant kingdom. The inner cells have the appearance of guard cells, especially when the poral walls of the larger cells are removed, and were so designated by Oestry Stidd and Stidd (1976). Cuticle preparations (Reihman and Schabilion, 1985) leave most of the cell structure of the stomatal apparatus intact among other leaf tissues (are not removed with the cuticle) and therefore do not reveal essential features.