Some Ultrastructural Observations on Endodermal Cell Development in Zea Mays Roots

Haas, David L.; Carothers, Zane B.

doi:10.2307/2442087

Cited by 26 publications

(6 citation statements)

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“…The cross-sections of haustoria on barley also show that the endodermis close to the penetration site has entered the tertiary stage. At this stage of development the endodermis has thickened as cellulose is deposited on top of suberised lamella (Haars and Carothers, 1974). In contrast, the remaining parts of the endodermis are still in the primary stage where the endodermal walls are thin and bear a continuous Casparian strip (Haars and Carothers, 1974).…”

Section: Article In Pressmentioning

confidence: 99%

“…At this stage of development the endodermis has thickened as cellulose is deposited on top of suberised lamella (Haars and Carothers, 1974). In contrast, the remaining parts of the endodermis are still in the primary stage where the endodermal walls are thin and bear a continuous Casparian strip (Haars and Carothers, 1974). Nearly, all the cells of the stele have thickened, lignified cell walls and there are only a small number of living, unlignified phloem cells.…”

Section: Article In Pressmentioning

confidence: 99%

“…The parasitised roots are structurally different from haustorium-free host roots at the same developmental stage; the whole endodermis is in the tertiary state including the passage cells. Thus, it is thickened containing both cellulose and suberised material (Haars and Carothers, 1974). Additionally, nearly all cortical tissue is lignified, even at a distance up to 1 mm from the haustorium.…”

Section: Article In Pressmentioning

confidence: 99%

See 2 more Smart Citations

An anatomical study of the haustoria of Rhinanthus minor attached to roots of different hosts

Rümer

Cameron

Wacker

et al. 2007

Flora - Morphology, Distribution, Functional Ecology of Plants

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Section: Article In Pressmentioning

confidence: 99%

Section: Article In Pressmentioning

confidence: 99%

Section: Article In Pressmentioning

confidence: 99%

See 1 more Smart Citation

An anatomical study of the haustoria of Rhinanthus minor attached to roots of different hosts

Rümer

Cameron

Wacker

et al. 2007

Flora - Morphology, Distribution, Functional Ecology of Plants

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“…The endodermis of virtually all vascular plants (Clarkson and Robards 1975;Haas and Carothers 1975) and the exodermis Peterson and Perumalla 1990;Lehmann et al 2000) of the roots of many angiosperms develop a Casparian strip that is located in the transverse and the radial walls of cells of these tissues. When a root segment in which the Casparian strip has already formed is immersed in hypotonic solution, the plasmolysis figures of the endodermal cells appear to be stretched across the cells in cross-sections (Bryant 1934;Enstone and Peterson 1997).…”

Section: Introductionmentioning

confidence: 99%

Development of the Casparian strip in primary roots of maize under salt stress

Karahara

Ikeda

Kondo

et al. 2004

Planta

136

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The Casparian strip in the endodermis of vascular plant roots appears to play an important role in preventing the influx of salts into the stele through the apoplast under salt stress. The effects of salinity on the development and morphology of the Casparian strip in primary roots of maize ( Zea mays L.) were studied. Compared to the controls, the strip matured closer to the root tip with increase in the ambient concentration of NaCl. During growth in 200 mM NaCl, the number and the length of the endodermal cells in the region between the root tip and the lowest position of the endodermal strip decreased, as did the apparent rate of production of cells in single files of endodermal cells (the rate of cell formation being equal to the rate at which cells are lost from the meristem). The estimated time required for an individual cell to complete the formation of the strip after generation of the cell in the presence of 200 mM NaCl was not very different from that required in controls. Thus, salinity did not substantially affect the actual process of formation of the strip in individual cells. The radial width of the Casparian strip, a morphological parameter that should be related to the effectiveness of the strip as a barrier, increased in the presence of 200 mM NaCl. The mean width of the lignified region was 0.92 microm in distilled water and 1.33 microm in 200 mM NaCl at the lowest position of the strip. The mean width of the strip relative to that of the radial wall at this position was significantly greater after growth in the presence of 200 mM NaCl than in the controls, namely, 20.5% in distilled water and 33.9% in 200 mM NaCl. These observations suggest that the function of the strip is enhanced under salt stress.

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“…The Casparian strip, which is present in the radial walls of the endodermal cells in roots of vascular plants, plays an important role in retention of solutes in the stele (Clarkson and Robards 1975;Haas and Carothers 1975;Peterson et al 1981Peterson et al , 1993Shreiber et al 1999). The cell wall of the Casparian strip is impregnated with hydrophobic substances such as suberin (Zeier et al 1999a, b), and the plasma membrane adheres very strongly to the cell wall at the Casparian strip (Bonnett 1968;Karahara and Shibaoka 1992).…”

Section: Introductionmentioning

confidence: 99%

Radial widening of the Casparian strip follows induced radial expansion of endodermal cells

Yokoyama

Karahara

2001

Planta

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The Casparian strip, the barrier to apoplastic transport that is located at the endodermis in roots and stems, is formed by individual endodermal cells and is constructed as a highly organized mesh within the primary wall. Since little is known about the mechanism of formation of the strip, we tried to obtain morphological evidence for the existence, prior to suberization and lignification, of some regulatory system at the expected site of the strip. Endodermal cells in etiolated pea stems were induced to expand in the radial direction by piercing the stems through the cortex before formation of the strip. The radial width of the strip increased significantly with the expansion of the radial walls of these endodermal cells. The expansion of the cells occurred before the formation of the strip. However, strips that had already been formed when the stems were pierced did not increase in width despite an induced expansion of the radial walls. These observations suggest that some positional information exists in the radial wall of endodermal cells that defines the future site of formation of the strip and its width.

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Some Ultrastructural Observations on Endodermal Cell Development in Zea Mays Roots

Cited by 26 publications

References 0 publications

An anatomical study of the haustoria of Rhinanthus minor attached to roots of different hosts

An anatomical study of the haustoria of Rhinanthus minor attached to roots of different hosts

Development of the Casparian strip in primary roots of maize under salt stress

Radial widening of the Casparian strip follows induced radial expansion of endodermal cells

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