Cytological changes during cell wall sac formation in mulberry idioblasts

When calcium carbonate crystals are formed in mulberry (Morus abla) idioblasts, they are deposited in newly formed cell wall sacs. The initial cytological events leading to cell wall sac formation were observed in the distal end of young idioblasts and tentatively categorized into four stages. The f...

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Bibliographic Details
Published in:Protoplasma 2007-07, Vol.231 (1-2), p.123-125
Main Authors: Sugimura, Yukio, Nitta, Ikuro
Format: Article
Language:English
Subjects:
Calcium carbonate
Calcium carbonate deposition
Cell size
Cell Wall - metabolism
Cell Wall - ultrastructure
Cell wall sac
Cell walls
Cells
Crystals
cytochemistry
Enzymes
Gelatin
Idioblast
Morus - cytology
Morus alba
Polysaccharide
Polysaccharides
Spatial distribution
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Summary:When calcium carbonate crystals are formed in mulberry (Morus abla) idioblasts, they are deposited in newly formed cell wall sacs. The initial cytological events leading to cell wall sac formation were observed in the distal end of young idioblasts and tentatively categorized into four stages. The first indication of formation was the separation of the innermost cell wall layer from the cell wall, which is followed by the deposition of egg-shaped polysaccharide on the inner cell wall surface. The size of the deposit area increased, while the thickness of the cell wall significantly decreased during the next stage. Finally, the condensed cellulosic lamella was invaginated into the deposition area, resulting in the formation of an elongated cell wall sac. The internal cell wall sac was composed of numerous fibers with different morphologies. Application of gelatin-methenamine-silver staining allowed us to observe the spatial distribution of cellulosic polysaccharides as electron-dense images.
ISSN:0033-183X
1615-6102
DOI:10.1007/s00709-006-0229-4