CELL WALL CHEMISTRY AND FINE STRUCTURE IN LEPTOIDS OF DENDROLIGOTRICHUM (BRYOPHYTA): THE END WALL

Naked swarmers of both Cladophora rupestris and Chaetomorpha melagonium have been examined by the freeze-etching technique. The swarmers of Cladophora, collected just after settling, reveal several layers of granules external to the plasmalemma and internal to the so-called ‘fibrous-layer’. Chaetomorpha swarmers collected just before settling show extrusion of vesicles through the plasmalemma. The structures associated with the membranes are discussed in relation to known features of these swarmers already observed by sectioning. The role of granules in the synthesis of cell wall microfibrils is strengthened though the spatial arrangement of the granules seen in this investigation does not completely fulfil the ‘ordered granule’ hypothesis. Description of, and comments on, features related to cell wall synthesis, particularly the Golgi and vacuolar systems, are given.

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Cell wall chemistry and tissue structure underlie shifts in material properties of a perennial kelp

European Journal of Phycology ◽

10.1080/09670262.2018.1449013 ◽

2018 ◽

Vol 53 (3) ◽

pp. 307-317 ◽

Cited By ~ 7

Author(s):

Samuel Starko ◽

Shawn D. Mansfield ◽

Patrick T. Martone

Keyword(s):

Cell Wall ◽

Material Properties ◽

Tissue Structure ◽

Cell Wall Chemistry

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World-Wide Research, Fine Structure of Cytoplasm in Relation to Plant Cell Wall

Journal of Agricultural and Food Chemistry ◽

10.1021/jf60141a005 ◽

1965 ◽

Vol 13 (5) ◽

pp. 405-407 ◽

Cited By ~ 5

Author(s):

M. C. Ledbetter

Keyword(s):

Cell Wall ◽

Fine Structure ◽

Plant Cell ◽

World Wide ◽

Plant Cell Wall

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The Cell Wall Structure of Xylem Parenchyma

Australian Journal of Biological Sciences ◽

10.1071/bi9520223 ◽

1952 ◽

Vol 5 (2) ◽

pp. 223 ◽

Cited By ~ 3

Author(s):

AB Wardrop ◽

HE Dadswell

Keyword(s):

Cell Wall ◽

Fine Structure ◽

Secondary Cell Wall ◽

Primary Cell Wall ◽

Wall Structure ◽

Xylem Parenchyma ◽

Cell Axis ◽

X Ray ◽

Ray Methods ◽

Longitudinal Cell

The fine structure of the cell wall of both ray and vertical parenchyma has been investigated. In all species examined secondary thickening had occurred. In the primary cell wall the micellar orientation was approximately trans"erse to the longitudiJ)aI cell axis. Using optical and X-ray methods the secondary cell wall was shown to possess a helical micellar organization, the micelles being inclined between 30� and 60� to the longitudinal cell axis.

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Fine structure of tissue bordering lesions induced by wounding and virus infection

Canadian Journal of Botany ◽

10.1139/b78-363 ◽

1978 ◽

Vol 56 (23) ◽

pp. 2990-2999 ◽

Cited By ~ 7

Author(s):

G. Faulkner ◽

Warwick C. Kimmins

Keyword(s):

Cell Wall ◽

Fine Structure ◽

Secondary Cell Wall ◽

Wall Material ◽

Wall Thickening ◽

Pinto Bean ◽

Local Lesions ◽

Virus Localization ◽

Similar Appearance ◽

Secondary Cell Wall Thickening

Tissue in Phaseolus vulgaris L. cv. Pinto bean bordering local lesions induced by tobacco mosaic virus showed cell wall deposition associated with paramural body formation in a narrow ring of viable cells extending one to three cell diameters around the lesions. Deposition, which led to secondary cell wall thickening, was greatest 3–4 days after inoculation, the time when the lesion stopped expanding. Secondary cell wall thickening, of similar appearance but less pronounced, was seen in tissue bordering local lesions which continued to expand; no significant secondary cell wall thickening was observed in leaves with a nonlocalized infection. Cells bordering mechanical lesions differed markedly in fine structure from cells bordering virus and chemical lesions. It is suggested that the deposition of extra cell wall material in the wall regions of cells bordering fully expanded local lesions is associated with virus localization.

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Using 2D NMR spectroscopy to assess effects of UV radiation on cell wall chemistry during litter decomposition

Biogeochemistry ◽

10.1007/s10533-015-0132-1 ◽

2015 ◽

Vol 125 (3) ◽

pp. 427-436 ◽

Cited By ~ 16

Author(s):

Yang Lin ◽

Jennifer Y. King ◽

Steven D. Karlen ◽

John Ralph

Keyword(s):

Cell Wall ◽

Nmr Spectroscopy ◽

Litter Decomposition ◽

Uv Radiation ◽

2D Nmr ◽

2D Nmr Spectroscopy ◽

Cell Wall Chemistry

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Fine structure of the growing point of the coenocytic alga, Caulerpa sertularioides

Canadian Journal of Botany ◽

10.1139/b69-229 ◽

1969 ◽

Vol 47 (10) ◽

pp. 1599-1603 ◽

Cited By ~ 11

Author(s):

Arun K. Mishra

Keyword(s):

Cell Wall ◽

Fine Structure ◽

Osmium Tetroxide ◽

Axial Orientation ◽

Parallel Orientation ◽

Wall Formation ◽

Cytoplasmic Vesicles ◽

Side Walls

The coenocytic alga Caulerpa sertularioides (Gmelin) Howe was used for the study of the ultrastructure of cell wall and cytoplasm. After ultrasonic maceration and metal shadowing of the cell wall the microfibrils were observed to be random at the tip and parallel for each lamella of the subtip region and the mature portions of rhizome. The microfibrils in the two adjacent lamellae crossed each other at about right angles. The microfibrils of wall trabeculae were parallel to each other and to the long axis of the trabeculae. Fine structure studies of the algal cytoplasm were made using material fixed with glutaraldehyde and osmium tetroxide. The rhizome growing point was studied in detail. A gradient in the differentiation of cytoplasm was observed. The appearance varied from compact, homogeneous cytoplasm in the tip to a reticulate, vacuolate organization in the region farther back. Compartmentation in the cytoplasm was noted in the region immediately behind the compact, homogeneous cytoplasm of the tip region. Numerous smooth-walled vesicles were scattered throughout the growing point of the alga and were observed close to the plasmalemma near the cell wall. Microtubules with axial orientation were observed near the side walls of the alga. These also occurred in parallel orientation with respect to the microfibrils in the trabeculae at the growing points of the latter. The results were discussed with respect to the roles of microtubules and the cytoplasmic vesicles in the process of wall formation.

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