𝔖 Bobbio Scriptorium
✦   LIBER   ✦

The control of food mobilisation in seeds ofCucumis sativusL.

✍ Scribed by H. V. Davies; J. M. Chapman

Publisher
Springer-Verlag
Year
1979
Tongue
English
Weight
504 KB
Volume
146
Category
Article
ISSN
0032-0935

No coin nor oath required. For personal study only.

✦ Synopsis

Removal of the embryonic axis from germinated cucumber seeds, either on the second of fourth day after imbibition, subsequently results in reduced rates of lipid and protein degradation and in the accumulation of free sugars and amino acids in the cotyledons. These isolated cotyledons show an inherent capacity for expansion growth which apparently results from an increased rate of water uptake. When water uptake is inhibited by incubating samples in polyethylene glycol the rate of lipid degradation is further reduced. This is accompanied by an additional increase in the reducing sugar and sucrose content of the cotyledons. Protein degradation in isolated cotyledons is inhibited to the same extent whether samples are incubated in water or polyethylene glycol. Furthermore, amino acid levels show appreciable and almost identical increases in both incubation media. Evidently an inverse correlation exists between rates of reserve mobilisation and levels of end products. It is suggested that the axis controls food mobilisation through a sink effect by reducing the levels of end products in the cotyledons.

πŸ“œ SIMILAR VOLUMES

The control of food mobilisation in seed
The control of food mobilisation in seeds ofCucumis sativusL.
✍ H. V. Davies; J. M. Chapman πŸ“‚ Article πŸ“… 1979 πŸ› Springer-Verlag 🌐 English βš– 516 KB

The development of maximal rates of lipid and protein hydrolysis in cucumber cotyledons depends upon the removal of the testa and the presence of the embryonic axis. The testa appears to exert at least part of its inhibitory influence by suppressing the development of enzyme activity associated with

Influences of Photoperiodism and light t
Influences of Photoperiodism and light treatments during fruits storage on the phytochrome and on the germination ofCucumis prophetarumL. andCucumis sativusL. seeds
✍ Y. Gutterman; D. Porath πŸ“‚ Article πŸ“… 1975 πŸ› Springer-Verlag 🌐 English βš– 401 KB

Day length, temperature, light quality and hormone treatments given to plants during the ripening of their seeds have been shown to influence the subsequent germination of these seeds. The present work demonstrates that the light conditions, SD, LD or continuous dark, red or far-red light, during st

The site of photoinhibition in leaves of
The site of photoinhibition in leaves ofCucumis sativusL. at low temperatures is photosystem I, not photosystem II
✍ Ichiro Terashima; Sachiko Funayama; Kintake Sonoike πŸ“‚ Article πŸ“… 1994 πŸ› Springer-Verlag 🌐 English βš– 831 KB

Maximum quantum yields (QY) of photosynthetic electron flows through PSI and PSII were separately assessed in thylakoid membranes isolated from leaves of Cucumis sativus L. (cucumber) that had been chilled in various ways. The QY(PSI) in the thylakoids prepared from the leaves treated at 4 ~ C in mo