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The helicoidal organization of secondary cell walls is overviewed from several examples. Both the plywood texture and the occurrence of characteristic defects strongly suggest that the wall ordering is relevant of a cholesteric liquid-crystal assembly that is rapidly and strongly consolidated by lignification. A preferential localization of glucuronoxylans, major matrix components, and in vitro re-association...
Abstract.The development of pectin structural features during the differentiation of cambial derivatives was investigated in aspen (Populus tremula L.P. tremuloides Michx.) using biochemical and immunocytochemical methods. Comparisons were also made between active and resting tissues. Active tissues, in particular cambial cells and phloem derivatives, were characterized by a high pectin content. Use...
Several genotypes belonging to two different Solanum tuberosum subspecies were inoculated withErwinia carotovora subsp. atroseptica and their susceptibility to subsequent blackleg disease was monitored. The stem cell walls of the resistant genotype were characterized by a higher content of highly methylated and branched water-soluble pectins, although these cell walls were able to de-esterify very...
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