Abstract
The microsomal fraction obtained from guard cell protoplasts was assayed for ATPase activity at pH 6.5. Triton X-100 did not affect this stimulation of activity of ATPase by K+ up to 5 mM, but the detergent abolished the stimulatory effect of K+ at higher concentrations. The ATPase activity was inhibited by N,N-dicyclohexylcarbodiimide and ABA. Irradiation with red light enhanced the ATPase activity more than did irradiation with far-red light. ABA and irradiation with red or far-red light were effective only in the presence of K+. These results suggest the possibility that the ATPase activity is modulated only indirectly by light and ABA.
| Original language | English |
|---|---|
| Pages (from-to) | 945-949 |
| Number of pages | 5 |
| Journal | Plant and Cell Physiology |
| Volume | 30 |
| Issue number | 7 |
| DOIs | |
| State | Published - 1 Jan 1989 |
Keywords
- ABA
- DCCD
- K,Mg-ATPase
- Phytochrome
ASJC Scopus subject areas
- Physiology
- Plant Science
- Cell Biology
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