✦ LIBER ✦

Effect of light on the development of glyoxysomal functions in the cotyledons of mustard (Sinapis albaL.) seedlings

✍ Scribed by D. Bajracharya; P. Schopfer

Book ID: 104750905
Publisher: Springer-Verlag
Year: 1979
Tongue: English
Weight: 941 KB
Volume: 145
Category: Article
ISSN: 0032-0935
DOI: 10.1007/bf00388715

No coin nor oath required. For personal study only.

✦ Synopsis

The degradation of storage fat in the cotyledons of mustard seedlings is unaffected by phytochrome and photosynthesis (irradiation with continuous red or far-red light from sowing of the seeds) although light imposes a strong constraint on the translocation of organic matter from the cotyledons into the seedling axis. Likewise, the development and disappearance of glyoxysomal enzyme activities (isocitrate lyase, malate synthase, citrate synthase) takes place independently of light. It is concluded that the mobilization of storage fat (fat→carbohydrate transformation) is independent of photomorphogenesis. The surplus of carbohydrate produced from fat in the light seems to be converted to starch grains in the plastids, which function as a secondary storage pool in the cotyledons.

📜 SIMILAR VOLUMES

Regulation of the appearance of glutamin

Regulation of the appearance of glutamine synthetase in mustard (Sinapis albaL.) cotyledons by light, nitrate and ammonium

✍ S. Schmidt; H. Mohr 📂 Article 📅 1989 🏛 Springer-Verlag 🌐 English ⚖ 871 KB

During transformation of mustard seedlings cotyledons from storage organs to photosynthetically competent leaves, a process which occurs during the first 4 d after sowing, total glutamine-synthetase (GS, EC 6.3.1.2) activity increases from zero to the high level usually observed in green leaves. In

Sequential control of phytochrome-mediat

Sequential control of phytochrome-mediated synthesis de novo ofβ-amylase in the cotyledons of mustard (Sinapis albaL.) seedlings

✍ R. Sharma; P. Schopfer 📂 Article 📅 1982 🏛 Springer-Verlag 🌐 English ⚖ 685 KB

Effect of nitrate, ammonium, light and a

Effect of nitrate, ammonium, light and a plastidic factor on the appearance of multiple forms of nitrate reductase in mustard (Sinapis albaL.) cotyledons

✍ C. Schuster; S. Schmidt; H. Mohr 📂 Article 📅 1989 🏛 Springer-Verlag 🌐 English ⚖ 915 KB

which is cytosolic, as if it were a plastidic protein. The appearance of NR3 depends on the plastidic factor in principally the same way as that of NR~ and NR2 whereas NR 4 is totally independent of the plastidic factor. The data document particular kinds of interaction between controlling factors

Control of synthesisde novoof ascorbate

Control of synthesisde novoof ascorbate oxidase in the mustard seedling (Sinapis albaL.) by phytochrome

✍ G. J. Acton; H. Drumm; H. Mohr 📂 Article 📅 1974 🏛 Springer-Verlag 🌐 English ⚖ 860 KB

Density-labelling with deuterium oxide has been used to distinguish preexisting from newly made ascorbate oxidase (EC 1.10.3.3) molecules in cotyledons of the mustard seedling (Sinapis alba L.). The time course of the change in bandwidth of isopycnically banded enzyme, taken together with the accomp

Appearance of nitrite reductase in cotyl

Appearance of nitrite reductase in cotyledons of the mustard (Sinapis albaL.) seedling as affected by nitrate, phytochrome and photooxidative damage of plastids

✍ V. K. Rajasekhar; H. Mohr 📂 Article 📅 1986 🏛 Springer-Verlag 🌐 English ⚖ 775 KB

Nitrite reductase (NIR; EC 1.7.7.1) is a central enzyme in nitrate assimilation and is localized in plastids. The present study concerns the regulation of the appearance of NIR in cotyledons of the mustard (Sinapis alba L.) seedling. It was shown that light exerts its positive control over the nitra

STIMULATION OF THE SHIBATA SHIFT BY PHOT

STIMULATION OF THE SHIBATA SHIFT BY PHOTOCHROME IN THE COTYLEDONS OF THE MUSTARD SEEDLING SINAPIS ALBA L.

✍ M. Jabben; H. Mohr 📂 Article 📅 1975 🏛 John Wiley and Sons 🌐 English ⚖ 356 KB