A membrane that bounds the chief vacuole of a plant cell.
- However, these cells had a continuous layer of smooth plasma membrane, and central vacuoles had distinct tonoplasts.
- MIPs are abundant proteins localized to the plasma membrane, the tonoplast, or other endomembranes of plant cells.
- The tonoplast of K. daigremontiana mesophyll cells exhibits circadian behaviour of malate retention under constant darkness.
Late 19th century: from Greek tonos 'tension, tone' + plastos 'formed'.
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