Details

Autor(en) / Beteiligte

• Novak Frazer, L
• Moore, D

Titel

The role of calcium accumulation and the cytoskeleton in the perception and response of Coprinus cinereus to gravity

Ist Teil von

• Advances in space research, 1996, Vol.17 (6), p.87-90

Ort / Verlag

England: Elsevier Ltd

Erscheinungsjahr

1996

Quelle

Elsevier Journal Backfiles on ScienceDirect (DFG Nationallizenzen)

Beschreibungen/Notizen

• The role of Ca 2+ in the gravitropic perception and/or response mechanism of Coprinus cinereus was examined by treating stipes with inhibitors of Ca 2+ transport and calmodulin. Inhibitors had no effect on gravity perception but significantly diminished gravitropism. It is concluded that, under the conditions tested, Ca 2+ is not involved in gravity perception by Coprinus stipes, but does contribute to transduction of the gravitropic impulse. The results would be consistent with regulation of the gravitropic bending process requiring accumulation of Ca 2+ within a membrane-bound compartment. Treatment of stipes with an actin inhibitor caused a significantly delayed response, a result not observed with the Ca 2+ inhibitors. This suggests that cytoskeletal elements may be involved directly in perception of gravity by Coprinus stipes while Ca 2+-mediated signal transduction may be involved in directing growth differentials.