ISSN:
1430-3418
Keywords:
Calcium
;
Polarity
;
Growth
;
Signalling
;
Cell volume control
;
Fucus
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Abstract This review addresses the role of cytosolic Ca2+in the regulation of embryonic polarity, polarised growth and osmotic control of cell volume with particular emphasis on the marine alga Fucus. Evidence is presented that the control of cell elongation in plants and algae requires the co-ordinate control of cell turgor and vesicle exocytosis, all of which are regulated by cytosolic Ca2+. In the Fucus embryo, polarised growth of the rhizoid cell requires sustained elevation of Ca2+ at the rhizoid apex whereas osmotic cell volume control is effected by transient elevations of cytosolic Ca2+. The mechanisms by which these signals are generated and their different downstream responses are discussed. Answers to questions of how specificity of signalling can be achieved by signal-response pathways which share common components will require more detailed knowledge of the interactions between different components and the spatial and temporal patterns of their activation.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/s00898-998-0011-5
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