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Scientific article
English

Effect of EGTA on the diurnal leaf movement of Phaseolus vulgaris

Published inPlant physiology and biochemistry, vol. 35, p. 915-922
Publication date1997
Abstract

The synchronized 12:12 h (L:D) primary leaf movement of Phaseolus vulgaris was profoundly altered by a calcium chelator (EGTA 10 mM). This effect depended strongly on the phase at which this chemical was administered. When EGTA was sprayed on the leaf 8 h after lights-on the upward movement was advanced by 3-6 h. At a critical time point in the middle of the night, (around 17 h after the light-on, 5 h after light-off respectively) EGTA suppressed circadian rhythmicity and promoted an ultradian rhythm. The period of this ultradian rhythm was significantly longer (4.04 ± 0.09 h) in light than in darkness (3 .20 ± 0.13 h), and the amplitude was also higher in light than in darkness.

Keywords
  • Calcium
  • Circadian rhythm
  • EGTA
  • Leaf movement
  • Phaseolus vulgaris
  • Rhythm
  • Ultradian
Citation (ISO format)
KAYALI, Saad, GREPPIN, Hubert, DEGLI AGOSTI, Robert. Effect of EGTA on the diurnal leaf movement of Phaseolus vulgaris. In: Plant physiology and biochemistry, 1997, vol. 35, p. 915–922.
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Article (Published version)
accessLevelRestricted
Identifiers
  • PID : unige:42720
ISSN of the journal0981-9428
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