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Induction of amylase in mustard seedlings by phytochrome

✍ Scribed by H. Drumm; I. Elchinger; J. Möller; K. Peter; H. Mohr

Publisher
Springer-Verlag
Year
1971
Tongue
English
Weight
543 KB
Volume
99
Category
Article
ISSN
0032-0935

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✦ Synopsis

In the cotyledons of mustard seedlings (Sinapis alba L.) amylase activity can be induced by phytochrome. In the dark amylase activity remains low. Gibberellic acid (GA3) does not stimulate an increase of amylase activity in this system. Inhibitors of RNA and protein synthesis strongly inhibit the increase of amylase activity mediated by phytochrome. In gel electrophoresis amylase from mustard seedlings reveals 3 bands. The electrophoretic pattern is the same for extracts from dark-grown and from irradiated seedlings. When mustard amylases were incubated with starch the pattern of products was similar to that produced by commercially available barley β-amylase and not similar to that produced by Bacillus subtilis α-amylase.

📜 SIMILAR VOLUMES

On the phytochrome phototransformation k
On the phytochrome phototransformation kinetics in mustard seedlings
✍ E. Schäfer; B. Marchal; D. Marmé 📂 Article 📅 1971 🏛 Springer-Verlag 🌐 English ⚖ 454 KB

The in vivo phototransformation kinetics of mustard hook and cotyledon phytochrome exhibit a deviation from a single first order curve, quite similar to that for pumpkin hooks as reported in a previous paper (Boisard, Marmé and Schäfer, 1971). The P fr→Prkinetics can be characterized by the ratios ɛ