NDLI: Variation in lignin and cell wall digestibility in caffeic acid O-methyltransferase down-regulated maize half-sib progenies in field experiments

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Variation in lignin and cell wall digestibility in caffeic acid O-methyltransferase down-regulated maize half-sib progenies in field experiments

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Variation in lignin and cell wall digestibility in caffeic acid O-methyltransferase down-regulated maize half-sib progenies in field experiments

Content Provider	Springer Nature Link
Author	Pichon, Magalie Deswartes, Caroline Gerentes, Denise Guillaumie, Sabine Lapierre, Catherine Toppan, Alain Barrière, Yves Goffner, Deborah
Copyright Year	2006
Abstract	Lignin content and structure were examined in seven caffeic acid O-methyltransferase antisense (COMT-AS) maize progenies and their corresponding normal inbred lines in relation to cell wall digestibility. The seven parental inbreds were chosen for their highly divergent in vitro wall digestibility. Maize plants were grown under field conditions to determine (i) if the positive effect of COMT down-regulation on wall chemistry and digestibility was similar to that previously observed for COMT-AS maize grown in the greenhouse and (ii) to what extent the genetic background was a factor in determining the effect of the transgene. All␣COMT-AS progenies displayed a significant reduction in endogenous COMT activity (14–43% residual activity). In all but one genetic background (F4), the COMT-AS gene resulted in an expected increase in wall digestibility accompanied by changes in lignin composition. These effects varied greatly among parental lines, and independently of the inherent digestibility values in the corresponding non-transformed lines. Curiously, in the highly digestible F4 background, the typical decrease in syringyl (S) unit lignin and a higher frequency of 5-OH guaiacyl lignin resulting from the introduction of the COMT-AS transgene were not observed. Our results indicate that COMT down-regulation via an antisense strategy is an efficient tool for forage maize improvement in the field.
Starting Page	253
Ending Page	261
Page Count	9
File Format	PDF
ISSN	13803743
Journal	Molecular Breeding
Volume Number	18
Issue Number	3
e-ISSN	15729788
Language	English
Publisher	Kluwer Academic Publishers
Publisher Date	2006-09-23
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Antisense COMT Digestibility Forage Lignin Maize Plant Sciences
Content Type	Text
Resource Type	Article
Subject	Genetics Plant Science Molecular Biology Biotechnology Agronomy and Crop Science

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RNAi-suppression of barley caffeic acid O-methyltransferase modifies lignin despite redundancy in the gene family

Expression of cell wall related genes in basal and ear internodes of silking brown-midrib-3, caffeic acid O-methyltransferase (COMT) down-regulated, and normal maize plants

Expression of cell wall related genes in basal and ear internodes of silking brown-midrib-3, caffeic acid O-methyltransferase (COMT) down-regulated, and normal maize plants

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Identification and Characterization of Four Missense Mutations in Brown midrib 12 (Bmr12), the Caffeic O-Methyltranferase (COMT) of Sorghum

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Time Course Field Analysis of COMT-Downregulated Switchgrass: Lignification, Recalcitrance, and Rust Susceptibility

Variation in lignin and cell wall digestibility in caffeic acid O-methyltransferase down-regulated maize half-sib progenies in field experiments

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Variation in lignin and cell wall digestibility in caffeic acid O-methyltransferase down-regulated maize half-sib progenies in field experiments