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Arsenite reduces acid content in Citrus fruit, inhibits activity of citrate synthase but induces its gene expression
Year:
2000
Authors :
Artzi, Bracha
;
.
Cohen, Lydia
;
.
Dahan, Esther
;
.
Erner, Yair
;
.
Hasdai, David
;
.
Sadka, Avi
;
.
Tagari, Eliezer
;
.
Volume :
125
Co-Authors:
Sadka, A., Department of Citriculture, Institute of Horticulture, Volcani Center, P.O. Box 6, Bet Dagan 50250, Israel
Artzi, B., Department of Citriculture, Institute of Horticulture, Volcani Center, P.O. Box 6, Bet Dagan 50250, Israel
Cohen, L., Department of Citriculture, Institute of Horticulture, Volcani Center, P.O. Box 6, Bet Dagan 50250, Israel
Dahan, E., Department of Citriculture, Institute of Horticulture, Volcani Center, P.O. Box 6, Bet Dagan 50250, Israel
Hasdai, D., Department of Citriculture, Institute of Horticulture, Volcani Center, P.O. Box 6, Bet Dagan 50250, Israel
Tagari, E., Department of Citriculture, Institute of Horticulture, Volcani Center, P.O. Box 6, Bet Dagan 50250, Israel
Erner, Y., Department of Citriculture, Institute of Horticulture, Volcani Center, P.O. Box 6, Bet Dagan 50250, Israel
Facilitators :
From page:
288
To page:
293
(
Total pages:
6
)
Abstract:
Arsenic compounds generate diverse effects in all living organisms. In citrus (Citrus L. sp.), they reduce acidity and improve fruit quality by unknown mechanisms. The major organic acid in citrus fruit is citric acid, which begins accumulating early in fruit development, reaches a peak in middle-sized fruit and then, in most species, declines as the fruit matures. In an attempt to understand the basis of the effect of arsenite, it was applied to 'Minneola' tangelo (Citrus paradisi Macf. x C. reticulata Blanco) ≃6 weeks postanthesis, and a detailed analysis of total titratable acidity and citric acid concentration was performed throughout fruit growth. Within 35 days after arsenite application, total acid content and citrate concentration were slightly lower compared with the controls, and this difference persisted throughout fruit development. The concentrations of other organic acids were not reduced by the treatment. Sodium arsenite reduced the citrate concentration in 'Eurieka' lemon callus [Citrus limon (L.) Burm.] also, without affecting tissue growth. Extractable activity of citrate synthase in treated fruit was inhibited within 1 day following arsenite spray, but recovered to a normal level a few days later. In contrast, gene expression was remarkably induced 1 day following treatment, which might explain the recovery in enzyme activity. Data suggest that reduction in acid accumulation may not be related to the initial inhibition of citrate synthase activity.
Note:
Related Files :
'Eurieka' lemon
'Minneola' tangelo
Citric acid
Citrus
Citrus limon
Citrus paradisi
Citrus reticulata
Show More
Related Content
More details
DOI :
Article number:
0
Affiliations:
Database:
Scopus
Publication Type:
article
;
.
Language:
English
Editors' remarks:
ID:
28442
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 00:39
Scientific Publication
Arsenite reduces acid content in Citrus fruit, inhibits activity of citrate synthase but induces its gene expression
125
Sadka, A., Department of Citriculture, Institute of Horticulture, Volcani Center, P.O. Box 6, Bet Dagan 50250, Israel
Artzi, B., Department of Citriculture, Institute of Horticulture, Volcani Center, P.O. Box 6, Bet Dagan 50250, Israel
Cohen, L., Department of Citriculture, Institute of Horticulture, Volcani Center, P.O. Box 6, Bet Dagan 50250, Israel
Dahan, E., Department of Citriculture, Institute of Horticulture, Volcani Center, P.O. Box 6, Bet Dagan 50250, Israel
Hasdai, D., Department of Citriculture, Institute of Horticulture, Volcani Center, P.O. Box 6, Bet Dagan 50250, Israel
Tagari, E., Department of Citriculture, Institute of Horticulture, Volcani Center, P.O. Box 6, Bet Dagan 50250, Israel
Erner, Y., Department of Citriculture, Institute of Horticulture, Volcani Center, P.O. Box 6, Bet Dagan 50250, Israel
Arsenite reduces acid content in Citrus fruit, inhibits activity of citrate synthase but induces its gene expression
Arsenic compounds generate diverse effects in all living organisms. In citrus (Citrus L. sp.), they reduce acidity and improve fruit quality by unknown mechanisms. The major organic acid in citrus fruit is citric acid, which begins accumulating early in fruit development, reaches a peak in middle-sized fruit and then, in most species, declines as the fruit matures. In an attempt to understand the basis of the effect of arsenite, it was applied to 'Minneola' tangelo (Citrus paradisi Macf. x C. reticulata Blanco) ≃6 weeks postanthesis, and a detailed analysis of total titratable acidity and citric acid concentration was performed throughout fruit growth. Within 35 days after arsenite application, total acid content and citrate concentration were slightly lower compared with the controls, and this difference persisted throughout fruit development. The concentrations of other organic acids were not reduced by the treatment. Sodium arsenite reduced the citrate concentration in 'Eurieka' lemon callus [Citrus limon (L.) Burm.] also, without affecting tissue growth. Extractable activity of citrate synthase in treated fruit was inhibited within 1 day following arsenite spray, but recovered to a normal level a few days later. In contrast, gene expression was remarkably induced 1 day following treatment, which might explain the recovery in enzyme activity. Data suggest that reduction in acid accumulation may not be related to the initial inhibition of citrate synthase activity.
Scientific Publication
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