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Cell wall metabolism in gibberellin-treated persimmon fruits
Year:
1996
Source of publication :
Plant Growth Regulation
Authors :
Franck, Andre
;
.
Sonego, Lilian
;
.
Volume :
19
Co-Authors:
Ben-Arie, R., Department of Postharvest Science of Fresh Agricultural Produce, Volcani Center, ARO, Bet-Dagan, 50250, Israel
Saks, Y., Institute for Research in the Golan Heights, Volcani Center, ARO, Bet-Dagan, 50250, Israel
Sonego, L., Department of Postharvest Science of Fresh Agricultural Produce, Volcani Center, ARO, Bet-Dagan, 50250, Israel
Frank, A., Department of Virology, Volcani Center, ARO, Bet-Dagan, 50250, Israel
Facilitators :
From page:
25
To page:
33
(
Total pages:
9
)
Abstract:
The application of gibberellin [GA3] to persimmon fruits as an orchard spray, at least 2 weeks prior to harvest, has been shown to delay ripening of the fruit on the tree and its rate of softening after harvest. This effect persisted during and after cold storage. The delay in softening has been attributed to the effect of the phytohormone on cell wall metabolism. To examine this hypothesis, cell walls of GA3-treated fruit were compared to those of non-treated fruit. Comparison between fruit was from harvest till the termination of post-storage softening. The study included TEM examinations, assay of certain hydrolase activities and determination of compositional changes occurring in the various cell-wall carbohydrate polymers. Our findings indicate that GA3 either delays or inhibits all of the cell wall changes that were found to accompany fruit softening, including dissolution of the middle lamella, separation of the plasmalemma from the cell-wall, mitigation of the structural coherence and density of the primary cell wall, increased solubilization of pectic polymers, loss of neutral sugars, predominantly arabinose and galactose, and increased activities of exo-polygalacturonase [PG] and endo-1,4-β-glucanase [EGase]. The principal discernible compositional difference between GA3- treated fruit and control fruit at harvest was a higher total carbohydrate content in the cell wall material extracted from GA3-treated fruit, which was due chiefly to an increased amount of cellulose.
Note:
Related Files :
cellulase
Cellulose
Diospyros kaki
Diospyros virginiana
Neutral sugars
Pectins
Polygalacturonase
Show More
Related Content
More details
DOI :
Article number:
Affiliations:
Database:
Scopus
Publication Type:
article
;
.
Language:
English
Editors' remarks:
ID:
30422
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 00:54
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Scientific Publication
Cell wall metabolism in gibberellin-treated persimmon fruits
19
Ben-Arie, R., Department of Postharvest Science of Fresh Agricultural Produce, Volcani Center, ARO, Bet-Dagan, 50250, Israel
Saks, Y., Institute for Research in the Golan Heights, Volcani Center, ARO, Bet-Dagan, 50250, Israel
Sonego, L., Department of Postharvest Science of Fresh Agricultural Produce, Volcani Center, ARO, Bet-Dagan, 50250, Israel
Frank, A., Department of Virology, Volcani Center, ARO, Bet-Dagan, 50250, Israel
Cell wall metabolism in gibberellin-treated persimmon fruits
The application of gibberellin [GA3] to persimmon fruits as an orchard spray, at least 2 weeks prior to harvest, has been shown to delay ripening of the fruit on the tree and its rate of softening after harvest. This effect persisted during and after cold storage. The delay in softening has been attributed to the effect of the phytohormone on cell wall metabolism. To examine this hypothesis, cell walls of GA3-treated fruit were compared to those of non-treated fruit. Comparison between fruit was from harvest till the termination of post-storage softening. The study included TEM examinations, assay of certain hydrolase activities and determination of compositional changes occurring in the various cell-wall carbohydrate polymers. Our findings indicate that GA3 either delays or inhibits all of the cell wall changes that were found to accompany fruit softening, including dissolution of the middle lamella, separation of the plasmalemma from the cell-wall, mitigation of the structural coherence and density of the primary cell wall, increased solubilization of pectic polymers, loss of neutral sugars, predominantly arabinose and galactose, and increased activities of exo-polygalacturonase [PG] and endo-1,4-β-glucanase [EGase]. The principal discernible compositional difference between GA3- treated fruit and control fruit at harvest was a higher total carbohydrate content in the cell wall material extracted from GA3-treated fruit, which was due chiefly to an increased amount of cellulose.
Scientific Publication
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