Induction of α-Amylase in Barley Endosperm by Substrate Levels of Glutamate and Aspartate
Open Access
- 1 April 1971
- journal article
- Published by Oxford University Press (OUP) in Plant Physiology
- Vol. 47 (4) , 551-554
- https://doi.org/10.1104/pp.47.4.551
Abstract
In seedlings of Raphanus sativus (radish) and Sinapis alba (mustard), irradiation for 6 hours with far red light significantly increases the extractable activity of phenylalanine ammonia-lyase by the end of the light period. A schedule of 10 minutes red light-110 minutes darkness-10 minutes red-110 minutes darkness-10 minutes red-110 minutes darkness has no effect as compared to dark controls. However, the red light program maintains a level of far red-absorbing phytochrome always measurable by in vivo spectrophotometry during the 6-hour experimental period. We conclude that the far red effect on this enzyme and for this specific material cannot be explained solely by formation and maintenance of far red-absorbing phytochrome.Keywords
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