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231223s2008 xx |||||o 00| ||eng c |
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|a 10.1093/jxb/erm323
|2 doi
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|a pubmed24n0592.xml
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|a (DE-627)NLM177552883
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|a (NLM)18267945
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|a DE-627
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|c DE-627
|e rakwb
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|a eng
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|a Guillon, Fabienne
|e verfasserin
|4 aut
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|a Down-regulation of an Auxin Response Factor in the tomato induces modification of fine pectin structure and tissue architecture
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|c 2008
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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|a ƒa Online-Ressource
|b cr
|2 rdacarrier
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|a Date Completed 07.04.2008
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|a Date Revised 07.12.2022
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|a published: Print-Electronic
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|a Citation Status MEDLINE
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|a It has previously been shown that down-regulation of an auxin response factor gene (DR12) results in pleiotropic phenotypes including enhanced fruit firmness in antisense transgenic tomato (AS-DR12). To uncover the nature of the ripening-associated modifications affecting fruit texture, comparative analyses were performed of pectin composition and structure in cell wall pericarp tissue of wild-type and AS-DR12 fruit at mature green (MG) and red-ripe (RR) stages. Throughout ripening, pectin showed a decrease in methyl esterification and in the content of galactan side chains in both genotypes. At mature green stage, pectin content in methyl ester groups was slightly higher in AS-DR12 fruit than in wild type, but this ratio was reversed at the red-ripe stage. The amount of water- and oxalate-soluble pectins increased at the red-ripe stage in the wild type, but decreased in AS-DR12. The distribution of methyl ester groups on the homogalaturonan backbone differed between the two genotypes. There was no evidence of more calcium cross-linked homogalacturan involved in cell-to-cell adhesion in AS-DR12 compared with wild-type fruit. Furthermore, the outer pericarp contains higher proportion of small cells in AS-DR12 fruit than in wild type and higher occurrence of (1-->5) alpha-L-arabinan epitope at the RR stage. It is concluded that the increased firmness of transgenic fruit does not result from a major impairment of ripening-related pectin metabolism, but rather involves differences in pectin fine structure associated with changes in tissue architecture
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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|a Carbohydrates
|2 NLM
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|a Plant Extracts
|2 NLM
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|a Plant Proteins
|2 NLM
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|a Pectins
|2 NLM
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| 650 |
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|a 89NA02M4RX
|2 NLM
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|a Oxalic Acid
|2 NLM
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|a 9E7R5L6H31
|2 NLM
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|a Philippe, Sully
|e verfasserin
|4 aut
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|a Bouchet, Brigitte
|e verfasserin
|4 aut
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|a Devaux, Marie-Françoise
|e verfasserin
|4 aut
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|a Frasse, Pierre
|e verfasserin
|4 aut
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|a Jones, Brian
|e verfasserin
|4 aut
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|a Bouzayen, Mondher
|e verfasserin
|4 aut
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|a Lahaye, Marc
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Journal of experimental botany
|d 1985
|g 59(2008), 2 vom: 27., Seite 273-88
|w (DE-627)NLM098182706
|x 1460-2431
|7 nnns
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| 773 |
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|g volume:59
|g year:2008
|g number:2
|g day:27
|g pages:273-88
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|u http://dx.doi.org/10.1093/jxb/erm323
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