Regulation of Mg, K-ATPase activity in guard cells of Commelina communis by phytochrome and ABA

A. Nejidat; C. Itai; N. Roth Bejerano

doi:10.1093/oxfordjournals.pcp.a077838

Regulation of Mg, K-ATPase activity in guard cells of Commelina communis by phytochrome and ABA

A. Nejidat, C. Itai, N. Roth Bejerano

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6 Scopus citations

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	https://doi.org/10.1093/oxfordjournals.pcp.a077838
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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10.1093/oxfordjournals.pcp.a077838

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title = "Regulation of Mg, K-ATPase activity in guard cells of Commelina communis by phytochrome and ABA",

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.",

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T1 - Regulation of Mg, K-ATPase activity in guard cells of Commelina communis by phytochrome and ABA

AU - Nejidat, A.

AU - Itai, C.

AU - Bejerano, N. Roth

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Y1 - 1989/1/1

N2 - 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.

AB - 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.

KW - ABA

KW - DCCD

KW - K,Mg-ATPase

KW - Phytochrome

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JO - Plant and Cell Physiology

JF - Plant and Cell Physiology

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ER -

Regulation of Mg, K-ATPase activity in guard cells of Commelina communis by phytochrome and ABA

Abstract

Keywords

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