Mechanosensitive Ca2+ channels receive mechanical stimuli in Chara corallina.

Kikuyama Munehiro, Saito Chiyuki, Kaneko Tomoyuki

doi:10.14841/jspp.2003.0.83.0

Bibliographic Information

Other Title

オオシャジクモの“受容器電位”には機械刺激感受性カルシウムチャンネルが関与する

Description

When Characese cytoplasm is rapidly hydrated, Ca²⁺ is released from some intracellular stores. This is explained as a Ca²⁺ channel activation at the store membrane in a mechanosensitive manner. It may be expected that mechanosensitive Ca²⁺ channels function not only at the membrane of the stores but also other membrane system such as plasma membrane. According to Shimmen, mechanical stimuli to an intact cell induces receptor potential which reflects activation of Cl^- channels at the plasma membrane. We studied possible contribution of mechanosensitive Ca²⁺ channels on the receptor potential. Removal of Ca²⁺ in the bathing medium reversibly inhibits the receptor potential. Mechanical stimuli caused not only receptor potential but also increases in cytoplasmic level ofCa²⁺, and both of those amplitudes are dependent on that of mechanical stimulus. These results strongly suggest that mechanical stimulus is first received by mechanosensitive Ca²⁺ channels at the plasma membrane.

Journal

Plant and Cell Physiology Supplement

Plant and Cell Physiology Supplement 2003 (0), 83-83, 2003

The Japanese Society of Plant Physiologists

Details 詳細情報について

CRID: 1390282680605454208

NII Article ID: 130006989129

DOI: 10.14841/jspp.2003.0.83.0

Data Source

JaLC
CiNii Articles

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Mechanosensitive Ca<SUP>2+</SUP> channels receive mechanical stimuli in <I>Chara corallina</I>.