Pollen exine substructure. III.Juniperus communis

摘要

Acetolyzed exines ofJuniperus communisextracted with hot 2-aminoethanol were prepared for electron microscopy. The strongly osmiophilic, homogeneous exine first becomes granular. With further extraction, granules are observed to surround unstained polygonal regions. The connections between granules are then broken leading to compound polygons, open polygons, and finally detached pieces. Orbicules and exine-1 are completely removed. The pattern of structural change is similar to that observed inLilium longiflorumand inFagus sylvatica.