Summary
The temperature dependence of cytoplasmic streaming in intact and tonoplast-free cells ofNitellopsis obtusa was studied using a cryomicroscope. The streaming velocity decreases linearly with decrease in the temperature in well-buffered tonoplast-free cells but non-linearly in some intact cells. These results suggest that low temperature causes a disturbance in the homeostasis of calcium and protons, which inhibit cytoplasmic streaming in intact cells.
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Abbreviations
- ADP:
-
adenosine 5′-diphosphate
- APW:
-
artificial pond water
- ATP:
-
adenosine 5′-triphosphate
- EGTA:
-
ethylene glycol-bis(β-aminoethyl ether)N,N′,N′-tetraacetic acid
- HEPES:
-
N-(2-hydroxyethyl)piperazine-N′-(2-ethanesulfonic acid)
- PIPES:
-
piperazine-N, N′-bis(2-ethanesulfonic acid)
- Tris:
-
tris(hydroxymethyl)aminoethane
References
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Shimmen, T., Yoshida, S. Analysis of temperature dependence of cytoplasmic streaming using tonoplast-free cells of Characeae. Protoplasma 176, 174–177 (1993). https://doi.org/10.1007/BF01378954
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DOI: https://doi.org/10.1007/BF01378954