EurekaMag.com logo
+ Site Statistics
References:
52,725,316
Abstracts:
28,411,598
+ Search Articles
+ Subscribe to Site Feeds
EurekaMag Most Shared ContentMost Shared
EurekaMag PDF Full Text ContentPDF Full Text
+ PDF Full Text
Request PDF Full TextRequest PDF Full Text
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter
Follow on Google+Follow on Google+
Follow on LinkedInFollow on LinkedIn

+ Translate

The electrical potential gradient of regenerating tubularia spatial and temporal characteristics


Growth 42(3): 347-356
The electrical potential gradient of regenerating tubularia spatial and temporal characteristics
In regenerating Tubularia, a reproducible pattern of surface potentials is correlated with the site of morphogenesis throughout development. The location, magnitude and direction of potential differences of regenerating stems were recorded by a method in which surface potentials were measured under oil. Control experiments established that the measurement procedure did not damage the organism and that the potentials being measured were produced by viable cells. During the early phase of development an electro-negative potential was detectable approximately 5 mm from the distal end of the stem, and each point closer to that end was progressively more negative than the previous point. A continuous electro-negative potential gradient (ENPG) existed across the several mm in which a primordium was forming. The ENPG was reproducibly measurable from hour to hour and persisted or increased significantly during early development until it became discontinuous when tentacles began to develop within the primordium. The ENPG is located in an appropriate region during early development to influence the determination of axial polarity in this organism.


Accession: 006670135



Related references

Electrical control of morphogenesis in regenerating Dugesia tigrina. II. Potential gradient vs. current density as control factors. Journal of Cellular Physiology 40(1): 11-23, 1952

Electrical potential difference ph gradient and phosphorylation on the relation between the trans membrane electrical potential difference ph gradient and atp formation in photosynthesis. Avron, Mordhay (Ed ) Proceedings Of The International Congress on Photosynthesis Research, 3rd , Vols I, Ii And Iii, Rehovot, Israel, Sept 2-6, 1974 Xix+806p(Vol 1 ); 794p(Vol 2 ); 594p(Vol 3 ) Illus Elsevier Publishing Company: Amsterdam, Netherlands; Elsevier/North-Holland, Inc : New York, N Y , U S A Isbn 0-444-41310-3(Vol 1 ); Isbn 0-444-41311-1(Vol 2 ); Isbn 0-444-41312-X(Vol 3 ) 427-436, 1975

Spatial-and-temporal variation laws of SPAC water potential gradient of P. tabulaeformis plantation. Journal of Beijing Forestry University 25(5): 1-5, 2003

Spatial and Temporal Characteristics of Rice Potential Productivity and Potential Yield Increment in Main Production Regions of China. Journal of Integrative Agriculture 12(1): 45-56, 2013

Temporal characteristics of the spatial organization of the bio electrical processes involved in the cortical transmission of excitation in the rabbit. Doklady Biological Sciences 241(1-6): 387-390, 1978

Spatial and temporal characteristics of potential evapotranspiration trends over China. International Journal of Climatology 20(4): 381-396, 2000

Temporal and spatial characteristics of action potential induced calcium changes in neurohypophysial terminals. Society for Neuroscience Abstracts 23(1-2): 422, 1997

Can temporal fluctuation in spatial wall shear stress gradient initiate a cerebral aneurysm? A proposed novel hemodynamic index, the gradient oscillatory number (GON). Journal of Biomechanics 42(4): 550-554, 2009

The determination of the regenerating hydranth in Tubularia. Physiol Zool 17(4): 355-366, 1944

Effects of analytical and visuo spatial cognitive tasks on spatio temporal characteristics of the human auditory evoked potential. Journal of Physiology (Cambridge) 438: 42P, 1991