Fluctuations in activity of dehydrogenases in leaves of tobacco genotypes as a function of time day and leaf maturity

Jong, Donald W. De; Woodlief, William G.

doi:10.1016/s0304-4211(79)90191-3

Cited by 3 publications

(1 citation statement)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Only three enzymes have their capacities increased during the night: NAD-GPD and 6-PGDH peak at tnidnight, and MDH at the end of the night span. The reciprocally-phased oscillations in NAD-and NADP-GPDs, which have already been observed by Myiata & Yatnatnoto (1969), Frosch etal., (1973, Walther & Edtnunds (1973), Goto (1978) and De Jong & Woodlief (1979), suggest the existence of an endogenous rhythm synchronized by the light-oti signal (Frosch et al, 1973), It would be teti-ipting to interpret this fact as reciprocal changes in the glycolytic space and in chloroplasts but this could as well be accounted for by the tnodulation of the chloroplast isozyrne pattern by pyridine nucleotides (De Looze & Wagner, 1983b), Indeed, it should be pointed out that the pool size changes in adenine and pyridine nucleotides tneasured in crude extracts by Bonzon etal. (1981Bonzon etal.…”

Section: Discussionmentioning

confidence: 99%

Enzyme patterns in energy metabolism during flower induction in spinach leaves

Bonzon

Agosti

Wagner³

et al. 1985

Plant Cell & Environment

View full text Add to dashboard Cite

Abstract. Time series measurements of six enzymes linked to different pathways in energy metabolism [NAD- and NADP-dependent glyceraldchyde-3-phosphate dehydrogenase (NAD- and NADP-GPDs), adenylate kinase (AK), malate dehydrogenase (MDH), glucose-6-phosphate dehydrogenase (G-6PDH) and 6-phosphogluconate dehydrogenase (6-PGDH)] have been performed in spinach leaves subjected to different photoperiodic treatments, inductive or not of the flowering process. It is shown that the vegetative and the floral states are characterized by specific enzyme patterns, respectively. Among the six enzymes measured, only three of them present a particular behaviour during the early period of flower induction and probably might be specific markers of this physiological change in the leaves. It is concluded that in a C3 plant such as spinach, floral induction in the leaves mostly involves a reorganization of the ‘vegetative’ metabolic network possibly through a change in phase relationships in the different pathways in energy metabolism

show abstract

Section: Discussionmentioning

confidence: 99%

Enzyme patterns in energy metabolism during flower induction in spinach leaves

Bonzon

Agosti

Wagner³

et al. 1985

Plant Cell & Environment

View full text Add to dashboard Cite

show abstract

Physiological Aspects of Protein Turnover

Davies¹

1982

Nucleic Acids and Proteins in Plants I

View full text Add to dashboard Cite

In vitro and in vivo regulation of chloroplast glyceraldehyde‐3‐phosphate dehydrogenase isozymes from Chenopodium rubrum. II. In vitro modulation of the isozyme pattern

Looze

Wagner

1983

Physiologia Plantarum

View full text Add to dashboard Cite

Isozymes of chloroplast glyceraldehyde‐3‐phosphate dehydrogenase (GPD, EC 1.2.1.13) from Chenopodium rubrum were separated using inverse discontinuous ammonium sulphate gradient solubilization. Leaves were extracted at the 9th h of light and the 9th h of darkness of a 12 h light/12 h dark cycle. The ratio of “NADP‐GPD I” to “NADP‐GPD II” varied with the light/dark cycle. However, the “light” isozyme pattern could be obtained from “dark” plants by including NADP + or NAD + kinase in the extraction buffer. Similarly, the “dark” isozyme pattern was produced in “light” plants extracted in the presence of NAD+. Pyridine nucleotides had no effect on the separated, purified isozymes. It is concluded that differential binding of the isozymes at the moment of extraction to pelletable material in the crude extract determines the isozyme pattern, and that this binding is regulated by the pyridine nucleotide ratio.

show abstract

Fluctuations in activity of dehydrogenases in leaves of tobacco genotypes as a function of time day and leaf maturity

Cited by 3 publications

References 4 publications

Enzyme patterns in energy metabolism during flower induction in spinach leaves

Enzyme patterns in energy metabolism during flower induction in spinach leaves

Physiological Aspects of Protein Turnover

In vitro and in vivo regulation of chloroplast glyceraldehyde‐3‐phosphate dehydrogenase isozymes from Chenopodium rubrum. II. In vitro modulation of the isozyme pattern

Contact Info

Product

Resources

About