The development of pollen grains and tapetum in Mitriostigma axillare (Rubiaceae) was
studied from anther primordium to dehiscence. Anthers were freeze-cracked and studied …

The development of the sporoderm in the fem Drynaria sparsisora (Desv.) Moore
(Polypodiaceae) is described after application of different methods of electron microscopy …

Main conclusion Our findings suggest a reconsideration of pollen wall ontogeny process,
entailing examination of physical factors, which enable a new understanding of exine …

During the early stages of microsporocyte ontogeny in Helleborus foetidus L. there is
protoplasmic continuity between the cells of the tapetum and between the individual …

Background and Aims Early developmental events in microsporogenesis are known to play
a role in pollen morphology: variation in cytokinesis type, cell wall formation, tetrad shape …

We studied the microsporogenesis in Tarenna gracilipes (Hayata) Ohwi, with special
attention to the mode of exine deposition and tapetum development. We based this research …

In this study, cytochemical staining methods were used to follow the cytochemical
modifications of microspore cytoplasm and sporoderm in Campsis radicans (L.) Seem. from …

Main conclusion The exceptionally complex exine of Echinops, representing a significant
investment of energy, develops from an elaborate glycocalyx which establishes, by self …

Abstract Subfamilies Podostemoideae and Tristichoideae of the aquatic flowering plant
family Podostemaceae are conventionally characterized by a different mode of …

Microsporogenesis in Impatiens parviflora was studied with special attention to the mode of
exine deposition and tapetum development. Our results are based on light, scanning …