Die organspezifische Photodetermination der Entwicklung von Peroxydaseaktivität im Senfkeimling ( Sinapis alba L.) durch Phytochrom
Open Access
- 1 June 1973
- journal article
- research article
- Published by Walter de Gruyter GmbH in Zeitschrift für Naturforschung C
- Vol. 28 (5-6) , 296-301
- https://doi.org/10.1515/znc-1973-5-611
Abstract
The development of extractable peroxidase activity in the mustard seedling is controlled by phytochrome (Pfr; operationally: Continuous far-red light) in an organ specific manner (enhancement in the cotyledons and taproot, inhibition in the hypocotyl; Tables I, II). Detailed kinetics of peroxidase accumulation in the cotyledons (Figs. 2, 3) reveal the existance of a two-step induction mechanism: 1. Formation of a stable transmitter during a period of competence to Pfr (“determination phase“), and 2. development of peroxidase activity mediated by the transmitter during a later period of competence to the transmitter (“realization phase“). These two periods of seedling development are completely separated in time.Keywords
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