ISSN:
1615-6102
Keywords:
Aequorin
;
Calcium
;
Characeae
;
Lamprothamnium
;
Turgor regulation
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Summary In internodal cells ofLamprothamnium succinctum, turgor regulation in response to hypotonie treatment is inhibited by lowering external Ca2+ concentration ([Ca2+]e) from 3.9 (normal) to 0.01 (low) mM. In order to clarify whether a change in the cytoplasmic free Ca2+ concentration ([Ca2+]c) is involved in turgor regulation, the Ca2+ sensitive protein aequorin was injected into the cytoplasm of internodal cells. A large transient light emission was observed upon hypotonic treatment under normal [Ca2+]e but not under low [Ca2+]e. Thus hypotonic treatment induces a transient increase in [Ca2+]c under normal [Ca2+]e but not under low [Ca2+]e.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01273256
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