Light and Electron Microscope Studies of the Cell Wall Structure of the Root Hairs of Raphanus sativus
1959; Wiley; Volume: 46; Issue: 8 Linguagem: Inglês
10.2307/2439297
ISSN1537-2197
AutoresClinton J. Dawes, Edwin Bowler,
Tópico(s)Plant Molecular Biology Research
ResumoDawes, Clinton J., and Edwin Bowler. (U. of California, Los Angeles.) Light and electron microscope studies of the cell wall structure of the root hairs of Raphanus sativus. Amer. Jour. Bot. 46(8): 561–565. Illus. 1959.—The structure and development of the cell wall of the root hair of Raphanus sativus were studied under the light and electron microscopes. The outer layer of the root hair consists of mucilage which covers the entire hair and forms a thick cap at the tip. Beneath the mucilage a thin cuticle covers the inner layers of the cell wall. These layers consist of cellulose microfibrils, varying in pattern, in a granular matrix, presumably pectic in nature. The microfibrils of the outer layer, apparently laid down at the tip, are reticulate in arrangement. In mature regions of the root hair, the wall is thickened by an inner layer of parallel and longitudinally orientated microfibrils. Pores in the cellulose wall are evident and increase in number and size near the base of the hair.
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