Linked Life Data

239004

Source:http://linkedlifedata.com/resource/pubmed/id/239004

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
3
pubmed:dateCreated
1975-10-28
pubmed:abstractText
Using a newly developed extracellular vibrating electrode, we have made the first study of the spatial distribution of the growth currents around a single developing egg. This pattern was studied during the current pulses wihic traverse two-celled Pelvetia embryos. These pulses can be stimulated to occur with a periodicity of 70 min by mild acidification of the dea water medium. Current enters only at the growing rhizoid's tip while leaving both the base of the rhizoid cell and the whole outer membrane of the thallus cell. The field in front of the rhizoid cell falls off as the inverse cube of the distance from the rhizoid cell's center in the manner of a dipole field. The total inward and outward currents are equal, agreeing with theory. The current density at the rhizoid cell's base is twice that at the top of the thallus cell and this probably represents a change in the outer membrane's properties. There are no significant differences in the durrent density over the thallus cell. These results suggest a model in which the pulse current leaks in through newly opened channels in the growing tip and leaks out elsewhere due to the resultant fall in the membrane potential.
pubmed:commentsCorrections
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:status
MEDLINE
pubmed:month
Mar
pubmed:issn
0021-9525
pubmed:author
pubmed:issnType
Print
pubmed:volume
64
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
636-43
pubmed:dateRevised
2009-11-18
pubmed:meshHeading
pubmed:year
1975
pubmed:articleTitle
The pulse current pattern generated by developing fucoid eggs.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, Non-P.H.S.