Length, strength and water flow: relative importance of wave and current exposure on morphology in kelp Laminaria hyperborea

Marine Ecology Progress Series ◽

10.3354/meps10778 ◽

2014 ◽

Vol 506 ◽

pp. 61-70 ◽

Cited By ~ 19

Author(s):

T Bekkby ◽

E Rinde ◽

H Gundersen ◽

KM Norderhaug ◽

JK Gitmark ◽

...

Keyword(s):

Water Flow ◽

Relative Importance ◽

Laminaria Hyperborea ◽

Current Exposure

Download Full-text

Importance of wave and current exposure to fauna communities in Laminaria hyperborea kelp forests

Marine Ecology Progress Series ◽

10.3354/meps10754 ◽

2014 ◽

Vol 502 ◽

pp. 295-301 ◽

Cited By ~ 19

Author(s):

KM Norderhaug ◽

H Christie ◽

E Rinde ◽

H Gundersen ◽

T Bekkby

Keyword(s):

Kelp Forests ◽

Laminaria Hyperborea ◽

Current Exposure

Download Full-text

Effect of verapamil on cytoplasmic distribution of granules and microfilaments in amphibian urinary bladder

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100103681 ◽

1988 ◽

Vol 46 ◽

pp. 324-325

Author(s):

A.J. Mia ◽

L.X. Oakford ◽

T. Yorio

Keyword(s):

Urinary Bladder ◽

Water Flow ◽

Morphological Changes ◽

Granular Cell ◽

Cytosolic Calcium ◽

Calcium Storage ◽

Amphibian Urinary Bladder ◽

Vesicular Membrane ◽

High Concentrations ◽

Cytoskeletal System

The amphibian urinary bladder has been used as a ‘model’ system for studies of the mechanism of action of antidiuretic hormone (ADH) in stimulating transepithelial water flow. The increase in water permeability is accompanied by morphological changes that include the stimulation of apical microvilli, mobilization of microtubules and microfilaments and vesicular membrane fusion events . It has been shown that alterations in the cytosolic calcium concentrations can inhibit ADH transmembrane water flow and induce alterations in the epithelial cell cytomorphology, including the cytoskeletal system . Recently, the subapical granules of the granular cell in the amphibian urinary bladder have been shown to contain high concentrations of calcium, and it was suggested that these cytoplasmic constituents may act as calcium storage sites for intracellular calcium homeostasis. The present study utilizes the calcium antagonist, verapamil, to examine the effect of calcium deprivation on the cytomorphological features of epithelial cells from amphibian urinary bladder, with particular emphasis on subapical granule and microfilament distribution.

Download Full-text