[Delta]-Aminolevulinic acid dehydratase activity during tomato fruit development and ripening

1994 ◽  
Author(s):  
Marios Costa Kyriacou
Keyword(s):  
Fruit Development ◽  
Aminolevulinic Acid ◽  
Tomato Fruit ◽  
Acid Dehydratase ◽  
Fruit Development And Ripening ◽  
Dehydratase Activity

scholarly journals 736 PB 032 5-AMINOLEVULINIC ACID DEHYDRATASE ACTIVITY DURING TOMATO FRUIT DEVELOPMENT AND RIPENING

HortScience ◽  
1994 ◽  
Vol 29 (5) ◽  
pp. 538d-538
Author(s):  
Marios C. Kyriacou ◽  
David J. Hannapel ◽  
Richard J. Gladon
Keyword(s):  
Aminolevulinic Acid ◽  
Developmental Regulation ◽  
Chlorophyll Biosynthesis ◽  
Tomato Fruit ◽  
Assay Procedure ◽  
Tomato Fruit Ripening ◽  
Fruit Development And Ripening ◽  
Alad Activity ◽  
Dehydratase Activity

Tomato fruit ripening is characterized by a decrease in chlorophyll content and an increase in lycopene synthesis. 5-Aminolevulinic acid (ALA) dehydratase (ALAD) is the fruit committed enzyme in the chlorophyll and heme biosynthetic pathways, and it catalyzes the dimerization of two ALA molecules into porphobilinogen We have focused our attention on the potential pivotal role of ALAD in the developmental regulation of chlorophyll biosynthesis during tomato fruit growth, development, and ripening. We have standardized an assay procedure for measuring the enzymatic activity of ALAD in tomato fruit tissues. The activity of ALAD was assayed from ten days past anthesis to day 60, when fruits where void of chlorophyll. We observed a several-fold decline in ALAD activity to residual levels during fruit ontogeny. Our data also show greater ALAD activity in chlorophyllous organs (leaves, stems, immature fruits) than in nonchlorophyllous organs (roots, ripe fruits), where heme production is predominant.

scholarly journals Erythrocyte D -Aminolevulinic Acid Dehydratase (Ala-D) Activity and Blood Lead Level (Pb-B) of Tortoise (Testudo Hemanni, Gmel.) of Vicinity of Lead and Zinc Smelter “Trepca” in Kosova

1998 ◽  
Vol 1 (1) ◽  
pp. 24-25
Author(s):  
I. Elezaj ◽  
D.A. Rozhaja
Keyword(s):  
Aminolevulinic Acid ◽  
Lead Level ◽  
Blood Lead ◽  
Significant Negative Correlation ◽  
Polluted Environment ◽  
Zinc Smelter ◽  
Acid Dehydratase ◽  
Lead And Zinc ◽  
Testudo Hermanni ◽  
Dehydratase Activity

In comparison with control animals, a significant negative correlation (r = 0.77 -), between lead level and the activity of daminolevulinic acid dehydratase activity in the blood of land turtle (Testudo hermanni, Gmel.) caught in five different localities from heavy polluted environment of lead and zinc smelter “Trepca” was found. The concentration ratio of lead level in blood between control animals and those from the vicinity of smelter was 10:160 % and ratio of ALA-D activity was 10:18,3 U/LE.

scholarly journals PHYTOCHROMES B1/B2 ARE KEY REGULATORS OF EPIGENOME REPROGRAMMING DURING TOMATO FRUIT DEVELOPMENT

2020 ◽  
Author(s):  
Ricardo Bianchetti ◽  
Nicolas Bellora ◽  
Luis A de Haro ◽  
Rafael Zuccarelli ◽  
Daniele Rosado ◽  
...  
Keyword(s):  
Fruit Development ◽  
Epigenetic Modification ◽  
Tomato Fruit ◽  
Dna Demethylation ◽  
Temperature Perception ◽  
Genome Wide ◽  
Fruit Development And Ripening ◽  
Histone Modifying Enzymes ◽  
Level Of Understanding ◽  
Agronomical Traits

AbstractPhytochrome-mediated light and temperature perception has been shown to be a major regulator of fruit development. Furthermore, chromatin remodelling via DNA demethylation has been described as a crucial mechanism behind the fruit ripening process; however, the molecular basis underlying the triggering of this epigenetic modification remains largely unknown. Here, an integrative analyses of the methylome, siRNAome and transcriptome of tomato fruits from phyA and phyB1B2 null mutants was performed, revealing that PHYB1 and PHYB2 influences genome-wide DNA methylation during fruit development and ripening. The experimental evidence indicates that PHYB1B2 signal transduction relies on a gene expression network that includes chromatin organization factors (DNA methylases/demethylases, histone-modifying enzymes and remodelling factors) and transcriptional regulators, ultimately leading to altered mRNA profile of photosynthetic and ripening-associated genes. This new level of understanding provides insights into the orchestration of epigenetic mechanisms in response to environmental cues affecting agronomical traits in fleshy fruits.

Effects of Cadmium, Lead, Mercury and Zinc on °-Aminolevulinic Acid Dehydratase Activity from Radish Leaves

2002 ◽  
Vol 45 (1) ◽  
pp. 85-89 ◽  
Author(s):  
V.M. Morsch ◽  
M.R.C. Schetinger ◽  
A.F. Martins ◽  
J.B.T. Rocha
Keyword(s):  
Aminolevulinic Acid ◽  
Acid Dehydratase ◽  
Cadmium Lead ◽  
Dehydratase Activity
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