Compositional Changes in ‘Bartlett’ Pear (Pyrus communis L.) Cell Wall Polysaccharides As Affected by Sunlight Conditions
Preharvest conditions can have a great impact on fruit quality attributes and postharvest responses. Firmness is an important quality attribute in pear, and excessive softening increases susceptibility to bruising and decay, thus limiting fruit postharvest life. Textural characteristics of fruits are determined at least in part by cell wall structure and disassembly. Few studies have analyzed the influence of fruit preharvest environment in softening, cell wall composition, and degradation. In the current work ‘Bartlett’ pears grown either facing the sun (S) or in the shade (H) were harvested and stored for 13 days at 20 °C. An evaluation of fruit soluble solids, acidity, color, starch degradation, firmness, cell wall yield, pectin and matrix glycan solubilization, depolymerization, and monosaccharide composition was carried out. Sun-exposed pears showed more advanced color development and similar levels of starch degradation, sugars, and acids than shaded fruit. Sunlight-grown pears were at harvest firmer than shade-grown pears. Both fruit groups softened during storage at 20 °C, but even after ripening, sun-exposed pears remained firmer. Sunlight exposure did not have a great impact on pectin molecular weight. Instead, at harvest a higher proportion of water-solubilized uronic acids and alkali-solubilized neutral sugars and a larger mean molecular size of tightly bound glycans was found in sun-exposed pears. During ripening cell wall catabolism took place in both sun- and shade-grown pears, but pectin solubilization was clearly delayed in sun-exposed fruit. This was associated with decreased removal of RG I-arabinan side chains rather than with reduced depolymerization.
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Format: | info:ar-repo/semantics/artículo biblioteca |
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American Chemical Society
2011-10-07
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Subjects: | Quality, Polysaccharides, Hemicellulose, Cell Walls, Pears, Varieties, Pome Fruits, Pectins, Calidad, Polisacáridos, Hemicelulosa, Pared Celular, Pera, Variedades, Frutas de Pepita, Pectinas, Softening, Preharvest, Reblandecimiento, Precosecha, Bartlett Pear Variety, |
Online Access: | http://hdl.handle.net/20.500.12123/18149 https://pubs.acs.org/doi/10.1021/jf203950d https://doi.org/10.1021/jf203950d |
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oai:localhost:20.500.12123-181492024-06-13T11:08:20Z Compositional Changes in ‘Bartlett’ Pear (Pyrus communis L.) Cell Wall Polysaccharides As Affected by Sunlight Conditions Raffo Benegas, Maria Dolores Ponce, Nora Marta Andrea Sozzi, Gabriel Oscar Vicente, Ariel Roberto Stortz, Carlos Arturo Quality Polysaccharides Hemicellulose Cell Walls Pears Varieties Pome Fruits Pectins Calidad Polisacáridos Hemicelulosa Pared Celular Pera Variedades Frutas de Pepita Pectinas Softening Preharvest Reblandecimiento Precosecha Bartlett Pear Variety Preharvest conditions can have a great impact on fruit quality attributes and postharvest responses. Firmness is an important quality attribute in pear, and excessive softening increases susceptibility to bruising and decay, thus limiting fruit postharvest life. Textural characteristics of fruits are determined at least in part by cell wall structure and disassembly. Few studies have analyzed the influence of fruit preharvest environment in softening, cell wall composition, and degradation. In the current work ‘Bartlett’ pears grown either facing the sun (S) or in the shade (H) were harvested and stored for 13 days at 20 °C. An evaluation of fruit soluble solids, acidity, color, starch degradation, firmness, cell wall yield, pectin and matrix glycan solubilization, depolymerization, and monosaccharide composition was carried out. Sun-exposed pears showed more advanced color development and similar levels of starch degradation, sugars, and acids than shaded fruit. Sunlight-grown pears were at harvest firmer than shade-grown pears. Both fruit groups softened during storage at 20 °C, but even after ripening, sun-exposed pears remained firmer. Sunlight exposure did not have a great impact on pectin molecular weight. Instead, at harvest a higher proportion of water-solubilized uronic acids and alkali-solubilized neutral sugars and a larger mean molecular size of tightly bound glycans was found in sun-exposed pears. During ripening cell wall catabolism took place in both sun- and shade-grown pears, but pectin solubilization was clearly delayed in sun-exposed fruit. This was associated with decreased removal of RG I-arabinan side chains rather than with reduced depolymerization. EEA Alto Valle Fil: Raffo Benegas, María Dolores. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Alto Valle; Argentina Fil: Ponce, Nora Marta Andrea. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Centro de Investigaciones en Hidratos de Carbono (CIHIDECAR). Departamento de Química Orgánica (DQO); Argentina Fil: Ponce, Nora Marta Andrea. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Sozzi, Gabriel Oscar. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Vicente, Ariel Roberto. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Centro de Investigación y Desarrollo en Criotecnología de Alimentos (CIDCA); Argentina Fil: Vicente, Ariel Roberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro de Investigación y Desarrollo en Criotecnología de Alimentos (CIDCA); Argentina Fil: Stortz, Carlos Arturo. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Centro de Investigaciones en Hidratos de Carbono (CIHIDECAR). Departamento de Química Orgánica (DQO); Argentina Fil: Stortz, Carlos Arturo. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina 2024-06-13T10:59:17Z 2024-06-13T10:59:17Z 2011-10-07 info:ar-repo/semantics/artículo info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://hdl.handle.net/20.500.12123/18149 https://pubs.acs.org/doi/10.1021/jf203950d 1520-5118 (Online) https://doi.org/10.1021/jf203950d eng info:eu-repo/semantics/restrictedAccess http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) application/pdf American Chemical Society Journal of Agricultural and Food Chemistry 59 (22) : 12155-12162 (November 2011) |
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Quality Polysaccharides Hemicellulose Cell Walls Pears Varieties Pome Fruits Pectins Calidad Polisacáridos Hemicelulosa Pared Celular Pera Variedades Frutas de Pepita Pectinas Softening Preharvest Reblandecimiento Precosecha Bartlett Pear Variety Quality Polysaccharides Hemicellulose Cell Walls Pears Varieties Pome Fruits Pectins Calidad Polisacáridos Hemicelulosa Pared Celular Pera Variedades Frutas de Pepita Pectinas Softening Preharvest Reblandecimiento Precosecha Bartlett Pear Variety |
spellingShingle |
Quality Polysaccharides Hemicellulose Cell Walls Pears Varieties Pome Fruits Pectins Calidad Polisacáridos Hemicelulosa Pared Celular Pera Variedades Frutas de Pepita Pectinas Softening Preharvest Reblandecimiento Precosecha Bartlett Pear Variety Quality Polysaccharides Hemicellulose Cell Walls Pears Varieties Pome Fruits Pectins Calidad Polisacáridos Hemicelulosa Pared Celular Pera Variedades Frutas de Pepita Pectinas Softening Preharvest Reblandecimiento Precosecha Bartlett Pear Variety Raffo Benegas, Maria Dolores Ponce, Nora Marta Andrea Sozzi, Gabriel Oscar Vicente, Ariel Roberto Stortz, Carlos Arturo Compositional Changes in ‘Bartlett’ Pear (Pyrus communis L.) Cell Wall Polysaccharides As Affected by Sunlight Conditions |
description |
Preharvest conditions can have a great impact on fruit quality attributes and postharvest responses. Firmness is an important quality attribute in pear, and excessive softening increases susceptibility to bruising and decay, thus limiting fruit postharvest life. Textural characteristics of fruits are determined at least in part by cell wall structure and disassembly. Few studies have analyzed the influence of fruit preharvest environment in softening, cell wall composition, and degradation. In the current work ‘Bartlett’ pears grown either facing the sun (S) or in the shade (H) were harvested and stored for 13 days at 20 °C. An evaluation of fruit soluble solids, acidity, color, starch degradation, firmness, cell wall yield, pectin and matrix glycan solubilization, depolymerization, and monosaccharide composition was carried out. Sun-exposed pears showed more advanced color development and similar levels of starch degradation, sugars, and acids than shaded fruit. Sunlight-grown pears were at harvest firmer than shade-grown pears. Both fruit groups softened during storage at 20 °C, but even after ripening, sun-exposed pears remained firmer. Sunlight exposure did not have a great impact on pectin molecular weight. Instead, at harvest a higher proportion of water-solubilized uronic acids and alkali-solubilized neutral sugars and a larger mean molecular size of tightly bound glycans was found in sun-exposed pears. During ripening cell wall catabolism took place in both sun- and shade-grown pears, but pectin solubilization was clearly delayed in sun-exposed fruit. This was associated with decreased removal of RG I-arabinan side chains rather than with reduced depolymerization. |
format |
info:ar-repo/semantics/artículo |
topic_facet |
Quality Polysaccharides Hemicellulose Cell Walls Pears Varieties Pome Fruits Pectins Calidad Polisacáridos Hemicelulosa Pared Celular Pera Variedades Frutas de Pepita Pectinas Softening Preharvest Reblandecimiento Precosecha Bartlett Pear Variety |
author |
Raffo Benegas, Maria Dolores Ponce, Nora Marta Andrea Sozzi, Gabriel Oscar Vicente, Ariel Roberto Stortz, Carlos Arturo |
author_facet |
Raffo Benegas, Maria Dolores Ponce, Nora Marta Andrea Sozzi, Gabriel Oscar Vicente, Ariel Roberto Stortz, Carlos Arturo |
author_sort |
Raffo Benegas, Maria Dolores |
title |
Compositional Changes in ‘Bartlett’ Pear (Pyrus communis L.) Cell Wall Polysaccharides As Affected by Sunlight Conditions |
title_short |
Compositional Changes in ‘Bartlett’ Pear (Pyrus communis L.) Cell Wall Polysaccharides As Affected by Sunlight Conditions |
title_full |
Compositional Changes in ‘Bartlett’ Pear (Pyrus communis L.) Cell Wall Polysaccharides As Affected by Sunlight Conditions |
title_fullStr |
Compositional Changes in ‘Bartlett’ Pear (Pyrus communis L.) Cell Wall Polysaccharides As Affected by Sunlight Conditions |
title_full_unstemmed |
Compositional Changes in ‘Bartlett’ Pear (Pyrus communis L.) Cell Wall Polysaccharides As Affected by Sunlight Conditions |
title_sort |
compositional changes in ‘bartlett’ pear (pyrus communis l.) cell wall polysaccharides as affected by sunlight conditions |
publisher |
American Chemical Society |
publishDate |
2011-10-07 |
url |
http://hdl.handle.net/20.500.12123/18149 https://pubs.acs.org/doi/10.1021/jf203950d https://doi.org/10.1021/jf203950d |
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