Abstract
Publisher Summary This chapter provides an overview of the more recent evidence concerning the constitution of microfibrils in plant cell walls. The first formed wall, developed within 2 hours of the settling of a swarmer, consists of rather sparse microfibrils widely separated and in random arrangement. Within a few days, the new layers of wall formed within this outer envelope show all the features of the wall of the adult filaments, consisting of two parallel sets of microfibrils arranged in two separate layers. In the two species of plant—Valonia and Cladophora—the microfibrils in the wall hydrolyze to give glucose only among the hydrolytic products. The chapter presents a comparative analysis of the constitution of the microfibril among different species that would depend rather on variations in the metabolic machinery within the cytoplasm responsible for the production and interconversion of saccharides and not necessarily on the presence or absence of any specific enzyme system.
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