Activity of glyceraldehyde-3-phosphate dehydrogenase isozymes during photoperiodic floral induction in spinach leaves

Article Article scientifique Article Activity of glyceraldehyde-3-phosphate dehydrogenase isozymes during photoperiodic floral induction in spinach leaves eng 1987 author Bonzon Marc 689574 author Simon Patrice 26360 author Greppin Hubert 24907 author Wagner Edgar Alphons 25361 author Degli Agosti Robert 26498 577-582 10.1111/j.1399-3054.1987.tb04308.x 0031-9317 The activity of NAD+ and NADP+-dependent glyceraldehyde-3-phosphate dehydrogenase isozymes (EC 1.2.1.12 and EC 1.2.1.13, respectively) were measured in spinach (Spinacia oleracea L. cv. Nobel) leaves grown under different photoperiodic treatments in order to discriminate between the early events of floral induction and processes related to acclimation. Glycolysis-linked isozyme activities were increased not only during floral induction and acclimation, but also during acclimation alone, suggesting that the changes in cytosolic activities were most probably associated with acclimation. In contrast, the chloroplast-linked isozyme activities only increased during flower induction and appeared to be specifically associated with the initiation of the flowering process. The relative activity changes in the chloroplast and cytosol compartments may thus be supposed to be among the first signs of translation of the photoperiodic signal into cytosolic and cellular metabolic adaptation, whereby the leaf moves rapidly into a new metabolic state. Isolated chloroplasts Metabolic adaptation Photoperiodism Signal transduction Spinacia oleracea Dewey 580 45 Département des sciences végétales 163 false Physiologia plantarum 70 4 Faculté des sciences / Section de biologie / Département des sciences végétales

Title	Published in	Access level	OA Policy	Year	Views	Downloads

Activity of glyceraldehyde-3-phosphate dehydrogenase isozymes during photoperiodic floral induction in spinach leaves	Physiologia plantarum			1987	670	0

Archive ouverte UNIGE

Bonzon, Marc