Microfibrillar Arrangement in Developing Fibers of Asparagus

Sterling, Clarence; Spit, B.J.

doi:10.2307/2438905

Cited by 9 publications

(2 citation statements)

References 10 publications

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“…5). At times an irregular criss-cross pattern, perhaps similar to that described by Sterling and Spit (10) and Moor (11) for other cells, was observed.…”

Section: Per Cent Per Hour the Correlation Between Maximum Relative Rate Of Elongation And Minimumsupporting

confidence: 85%

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Structural Characteristics of Developing Nitella Internodal Cell Walls

Green

1958

The Journal of Cell Biology

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The Nitella internodal cell is formed by a division of the segment cell, the latter being a direct derivative of the shoot apical cell. The internodal cell is remarkable in that it elongates from an initial length of about 20 microns to a mature length of about 60 millimeters. The structures of the apical and segment cells, and the internodal cells in all stages of development were examined with the techniques of interference, polarization, and electron microscopy. The apical and segment cells were found to be isotropic. The upper part of the segment cell, destined to form a node, shows a curious pitted structure that was characteristic of certain node structures. The lower part of the segment cell, destined to become an internodal cell, shows a vague transverse arrangement of fibrils at the inner wall surface. The internodal cells, from the time they are first formed, show negative birefringence and a transverse arrangement of microfibrils at the inner wall surface. The elongation of the internodal cell is characterized by a rise, dip, and rise in both the optical thickness and retardation of the cell wall. The dip in both these variables coincides with the attainment of the maximum relative elongation rate. After the cessation of elongation, wall deposition continues, but the fibrils at ~he inner surface of the wall are now seen to occur in fields of nearly parallel microfibrils. These fields, with varying fibrillar directions, may partly overlap each other or may merge with one another. Unlike the growing wall, this wall which is deposited after the end of elongation is isotropic.

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“…5). At times an irregular criss-cross pattern, perhaps similar to that described by Sterling and Spit (10) and Moor (11) for other cells, was observed.…”

Section: Per Cent Per Hour the Correlation Between Maximum Relative Rate Of Elongation And Minimumsupporting

confidence: 85%

“…The typical growing wall structure, described above, was not found in the elongating fiber cells of Asparagus by Sterling and Spit (10). They found no exact correlation between fibrillar orientation and the direction of elongation, but found that the wall possessed two crossing systems of near parallel microfibrils.…”

Section: Discussionmentioning

confidence: 84%