NDLI: A plasmolytic cycle: The fate of cytoskeletal elements

Content Provider	Springer Nature Link
Author	Lang Pauluzzi, I. Gunning, B. E. S.
Copyright Year	2000
Abstract	In most plant cells, transfer to hypertonic solutions causes osmotic loss of water from the vacuole and detachment of the living protoplast from the cell wall (plasmolysis). This process is reversible and after removal of the plasmolytic solution, protoplasts can re-expand to their original size (deplasmolysis). We have investigated this phenomenon with special reference to cytoskeletal elements in onion inner epidermal cells. The main processes of plasmolysis seem to be membrane dependent because destabilization of cytoskeletal elements had only minor effects on plasmolysis speed and form. In most cells, the array of cortical microtubules is similar to that found in nonplasmolyzed states except that longitudinal patterns seen in some control cells were never observed in plasmolyzed protoplasts of onion inner epidermis. As soon as deplasmolysis starts, cortical microtubules become disrupted and only slowly regenerate to form an oblique array, similar to most nontreated cells. Actin microfilaments responded rapidly to the plasmolysis-induced deformation of the protoplast and adapted to its new form without marked changes in organization and structure. Both actin microfilaments and microtubules can be present in Hechtian strands, which, in plasmolyzed cells, connect the cell wall to the protoplast. Anticytoskeletal drugs did not affect the formation of Hechtian strands.
Starting Page	174
Ending Page	185
Page Count	12
File Format	PDF
ISSN	0033183X
Journal	Protoplasma
Volume Number	212
Issue Number	3-4
e-ISSN	16156102
Language	English
Publisher	Springer-Verlag
Publisher Date	2000-01-01
Publisher Place	Vienna
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Cytoskeleton Hechtian strands Latrunculin B Onion inner epidermis Oryzalin Plasmolysis Cell Biology Plant Sciences Zoology
Content Type	Text
Resource Type	Article
Subject	Cell Biology Plant Science Medicine

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