Classical heme-containing plant peroxidases have been ascribed a wide variety of functional roles related to development, defense, lignification, and hormonal signaling. More than 40 peroxidase genes are now known in Arabidopsis thaliana for which functional association is complicated by a general lack of peroxidase substrate specificity. Computational analysis was performed on 30 near full-len...

Lignins have a major impact on the agro-industrial uses of plants. Until now, most of the strategies considered for lignin reduction have targeted the monolignol pathway since the genes involved in these metabolic steps have been identified in many plants. Less is known about the other steps and in particular on lignin polymerization in the cell wall. While it is established that peroxidases ar...

Superficial scald of pear fruit is a physiological disorder that easily occurs during cold storage and seriously affects eating quality commodity value. It important to study the mechanism superficial disorder. Our previous reported incidence calcium chloride (CaCl2)-treated was significantly lower than untreated fruit. In this study, we found accumulation lignin in CaCl2-treated The expression...

The influence of fiber source on fiber digestion in rabbits was investigated. Six fibrous feedstuffs with wide differences in chemical composition and particle size were selected: paprika meal, olive leaves, alfalfa hay, soybean hulls, sodium hydroxide-treated barley straw, and sunflower hulls. Six diets were formulated to contain one of these ingredients as the sole source of fiber. To avoid n...

Hot water-insoluble cell wall polysaccharides of immature and mature Dioscorea dunietomin and D. rotundata yam tubers have been characterized in enzymatically destarched flours and were mainly constituted of cellulose followed by hemicellulosic polymers of xylose, galactose, mannose and arabinose. Immature tubers of both species contained a higher proportion of cell wall carbohydrates than matu...

traditional paradigm for lignification. Our view is in sharp contrast with a recent model of lignin biosynthesis requiring template dependent stereospecific control of lignin polymerization (Lewis and Davin 1998, Davin et al. 1997) [see p. 33]. Structural information has long been used to guide the search for underlying mechanisms for important biological processes, and the biosynthesis of lign...