Summary
The first stages of cell wall formation were followed in the root meristems of maize and French bean. Most of the primary wall components (hemicellulose, cellulose and highly methylated pectins) were laid down simultaneously along the cell plate. During young cell wall maturation within the meristem itself, significant topochemical alterations, coupled with the addition of new polysaccharides, produced complete redistribution of wall material leading to the progressive appearance of a proper middle lamella. Thus the formation of a pectic middle lamella does not precede the deposition of primary walls. It is delayed until the new partition joins to the mother cell wall.
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Abbreviations
- DMSO:
-
dimethylsulphoxide
- EDTA:
-
ethylene diaminetetraacetic acid
- PATAg:
-
periodic acid-thiocarbohydrazide-silver proteinate
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Matar, D., Catesson, A.M. Cell plate development and delayed formation of the pectic middle lamella in root meristems. Protoplasma 146, 10–17 (1988). https://doi.org/10.1007/BF01354290
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DOI: https://doi.org/10.1007/BF01354290