The success of sexual plant reproduction is directly influenced by specific interactions between the pollen and pistil. Light, fluorescence and scanning electron microscopy techniques were used to evaluate the steps of pollination in sour passion fruit plants (Passiflora edulis Sims). In the compatible interaction, pollen tubes grow through stigma projections towards the ovary. The pollen grain...

is discharged from the anther as a dusty material and carried by either wind or insects to a plant ovary which is fertilised to generate a seed. Spores are the equivalent element in non-flowering plants such as mosses, ferns or fungi. Both spores and pollen grains are encased within a robust double-layered wall (a section of which is shown in Figure 1) which protects the fragile genetic materia...

The aim of this work was to carry out the reproductive studies on Brazilian accessions of ipecac, Psychotria ipecacuanha. It presented heterostyly, with brevistylous and longistylous flowers. The pollen development was observed from the sections of the anthers embedded in resin. Anther development was normal as usually observed in dicotyledones, displaying four layers: outer epidermis, endothec...

Abstract In the present work, pollen morphology of 22 species Anacardiaceae was analysed, occurring in state Bahia, Brazil. The palynological material obtained from specimens deposited herbaria. grains were acetolysed, measured, illustrated and described under light scanning electron microscopies. quantitative data statistically analysed according to sample size. presented monads, small medium ...

background & aim: satureja khuzistanica jamzad. is an aromatic and medicinal perennial plant belongs to family mint (lamiaceae). it is also an iranian exclusive endemic species, its essential oil components are widely used in medicinal, culinary, and perfume industries. experimental: flowers were collected in 10 regions in khuzistan and lorestan provinces, iran at early anthesis during 2009...

The study of pollen morphology has historically allowed evolutionary biologists to assess phylogenetic relationships among Angiosperms, as well as to better understand the fossil record. During this process, pollen has mainly been studied by discretizing some of its main characteristics such as size, shape, and exine ornamentation. One large plant clade in which pollen has been used this way fo...

BACKGROUND The extent to which co-evolutionary processes shape morphological traits is one of the most fascinating topics in evolutionary biology. Both passive and active pollination modes coexist in the fig tree (Ficus, Moraceae) and fig wasp (Agaonidae, Hymenoptera) mutualism. This classic obligate relationship that is about 75 million years old provides an ideal system to consider the role o...