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POLLEN EXINE SUBSTRUCTURE. I. LILIUM LONGIFLORUM
Author(s) -
Southworth Darlene
Publication year - 1985
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.1537-2197.1985.tb08380.x
Subject(s) - lilium , substructure , biology , homogeneous , pollen , materials science , botany , combinatorics , mathematics , structural engineering , engineering
Acetolyzed exines of Lilium longiflorum partially extracted with hot 2‐aminoethanol decrease in size and change from a homogeneous substructure to one with discrete interconnected granules. At first, the granules are arranged in irregular pentagons. As attachments between them are broken, compound polygons result, and with further extraction, the polygons become open at the surface. Granules are angular or ellipsoidal with a diameter of 10 nm or with major and minor axes of 7 and 15 nm. Higher order patterns include clumps of densely packed granules and ladderlike arrangements of adjacent polygons. The size and arrangement of granules and polygons is similar to the structures observed in developing exines of numerous genera.