To reach the ovule, pollen tubes must undergo many changes in growth direction. We have
shown in previous work that elevation of cytosolic free calcium ([Ca2+]c) can manipulate …

Pollen tube growth and reorientation is a prerequisite for fertilization and seed formation. Here
we report imaging of cAMP distribution in living pollen tubes microinjected with the protein …

Signal transduction in plant cells has come of age. Twenty years ago the subject did not exist,
and the word “transduction” would not have been recognized as having meaning for plant …

Significant advances in Ca 2+ and calmodulin signalling in whole plants and individual cells
have been recently reported. Particular relevant contributions have been made to the study …

One of the most interesting aspects of plant fertilization is the growth and orientation of the
pollen tube from the stigma to the ovary. Considerable research has been carried out in this …

Plant somatic cells have the remarkable ability to regenerate an entire organism. Many species
in the genus Kalanchoë, known as “mother of thousands,” develop plantlets on the leaf …

The function of the Rab-E subclass of plant Rab GTPases in membrane traffic was investigated
using a dominant-inhibitory mutant (RAB-E1 d [NI]) of Arabidopsis thaliana RAB-E1 d …

Phosphatidylinositol-4-monophosphate 5-kinases produce phosphatidylinositol (4,5)-bisphosphate
[PtdIns(4,5)P 2 ] and have been implicated in vesicle trafficking and cytoskeletal …

The maintenance of a calcium gradient and vesicle secretion in the apex of pollen tubes is
essential for growth. It is shown here that phosphatidylinositol-4,5-bisphosphate (PIP 2 ) and D…

We have shown previously that the inhibition of pollen tube growth and its subsequent
reorientation in Agapanthus umbellatus are preceded by an increase in cytosolic free calcium ([…