Modulation of mechanosensitive calcium-selective cation channels by temperature.

Gating of associations of mechanosensitive Ca(2+)-selective cation co-channels in the plasmalemma of onion epidermis has a strong and unusual temperature dependence. Tension-dependent activity rises steeply as temperature is lowered from 25 degrees C to about 6 degrees C, but drops to a low level at about 5 degrees C. Under the conditions tested (with Mg2+ and K+ at the cytosolic face of outside-out membrane patches), promotion results both from more bursting at all observed linkage levels and from longer duration of bursts of co-channels linked as quadruplets and quintuplets. Co-channel conductance decreases linearly, but only modestly, with declining temperature. It is proposed that these and related mechanosensitive channels may participate in a variety of responses to temperature, including thermonasty, thermotropism, hydrotropism, and both cold damage and cold acclimation.

[1]  B. Pickard.  Voltage transients elicited by brief chilling. , 1984, Plant, cell & environment.

[2]  B. Pickard.  Voltage transients elicited by sudden step-up of auxin. , 1984, Plant, cell & environment.

[3]  M. J. Jaffe,et al.  A Pea Mutant for the Study of Hydrotropism in Roots , 1985, Science.

[4]  T. Arvinte,et al.  Transformation of the cryobehavior of rye protoplasts by modification of the plasma membrane lipid composition. , 1988, Proceedings of the National Academy of Sciences of the United States of America.

[5]  D. V. Lynch,et al.  Freeze/thaw-induced destabilization of the plasma membrane and the effects of cold acclimation , 1989, Journal of bioenergetics and biomembranes.

[6]  P. Minorsky,et al.  Temperature sensing by plants: a review and hypothesis , 1989 .

[7]  R. M. Spanswick,et al.  Electrophysiological evidence for a role for calcium in temperature sensing by roots of cucumber seedlings , 1989 .

[8]  Ronald W. Davis,et al.  Rain-, wind-, and touch-induced expression of calmodulin and calmodulin-related genes in Arabidopsis , 1990, Cell.

[9]  M. Thomashow.  Molecular Genetics of Cold Acclimation in Higher Plants , 1990 .

[10]  Comparative studies of chilling stress on alterations of chloroplast ultrastructure and protein synthesis in the leaves of chilling-sensitive (mungbean) and -insensitive (pea) seedlings. , 1990 .

[11]  A. Campbell,et al.  Transgenic plant aequorin reports the effects of touch and cold-shock and elicitors on cytoplasmic calcium , 1991, Nature.

[12]  E. Schäfer,et al.  On the Putative Role of Microtubules in Gravitropism of Maize Coleoptiles , 1991 .

[13]  E. Schäfer,et al.  Do Microtubules Control Growth in Tropism? Experiments with Maize Coleoptiles : , 1991 .

[14]  Hideyuki Takahashi,et al.  Hydrotropism and its interaction with gravitropism in maize roots. , 1991, Plant physiology.

[15]  R. Denison,et al.  Measurement of legume nodule respiration and o(2) permeability by noninvasive spectrophotometry of leghemoglobin. , 1991, Plant physiology.

[16]  J. Ding,et al.  Mechanosensory calcium-selective cation channels in epidermal cells. , 1993, The Plant journal : for cell and molecular biology.