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Plant and Cell Physiology, 1969, Vol. 10, No. 2 457-460
© 1969

Short communication

Stimulative effect of potassium ion on starch synthetase of different plant origins

TAKAO MURATA1 and TAKASHI AKAZAWA2

1Department of Physiology and Genetics, National Institute of Agricultural Sciences Kitamoto, Saitama
2Seikagaku Seigyo Kenkyu Shisetsu, School of Agriculture, Nagoya University Chikusa, Nagoya, Japan

The stimulative effect of K+ on the activity of granule-bound starch synthetase was uniformly observed in the enzyme preparations obtained from the root, leaf and stem of sweet potato plants. The stimulation of K+ was most marked with the sweet potato enzyme, while the broad bean enzyme was also appreciably stimulated. The K+-effect was very small in the enzyme from rice, barley and taro plants.

(Received October 25, 1968; )
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