pollen grain


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pollen grain

n.
A microspore of a seed plant, containing a partially developed male gametophyte.

pol′len grain`


n.
a single granule of pollen.
[1825–35]
References in periodicals archive ?
The pollen viability may be affected by genetic factors such as abnormalities during microsporogenesis and climatic factors such as relative air humidity and air temperature that affects the pollen grain physiology (Ferreira et al., 2007).
The species is monophilic, being pollinated by a species belonging to a hymenopteran genus Trigona and edible pollen grain is the only reward offered to the pollinator.
It thus seems reasonable to suggest that differences in tassel morphology of the maize cultivars might influence pollen grain viability.
Description: Pollen grain, monosulcate, overall amb oval to subcircular or rounded quadrilateral.
trifurca and reported complex patterns the changes in the directions and magnitudes of pollen grain trajectories that were related to the surfaces obstructing airflow.
The result of analysis of variance detected significant differences for pollen grain viability among the plants derived from the tetraploid B.
According to some researchers [17,31,34], cytomixis plays a major role in chromosomal diversity and speciation of taxa because it also leads to unreduced pollen grain formation in a similar way followed by syncytes.
described fabricating porous micron-sized particles of silica using pollen grain templates [8], which is a facile method for replicating the complex surface morphology of tree pollen grains, in the case of silica productions complex colloidal materials with surface areas higher than 800 [m.sup.2] [g.sup.-1].