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STRUCTURAL DIMORPHISM OF STIGMATIC PAPILLAE IN DISTYLOUS LINUM SPECIES
Author(s) -
Dulberger Rivka
Publication year - 1974
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.1537-2197.1974.tb10771.x
Subject(s) - biology , linum , botany , cuticle (hair) , major duodenal papilla , sexual dimorphism , apex (geometry) , petal , anatomy , zoology
Intermorph differences in the wall structure and constituents of stigmatic papillae are described for distylous Linum pubescens and L. grandiflorum. In the long‐styled morph of both species the wall portion around the apex of the papilla has a thickened cellulose‐pectin layer. In the short‐styled morph of L. pubescens a cap zone is interposed between the cuticle and apical portion of the papilla wall. The subcuticular cap space contains pectins and lipid particles. Similar particles are also present in deposits on the cuticle surface. Papillae of the short‐styled morph in L. grandiflorum lack a cap zone and have only epicuticular lipid deposits. Other distylous Linum species in which the two morphs differ in wall structure of the papillae are L. mucronatum, L. flavum, L. perenne, L. austriacum , and L. maritimum. Studies of stigma dimorphism can help to elucidate evolutionary relations between dimorphic and monomorphic Linum species.