The Compositions and Quantitative Relations of Protein and Related Fractions in developing Root Cells

Morgan, Christopher J.; Reith, W. S.

doi:10.1093/jxb/5.1.119

Cited by 29 publications

(5 citation statements)

References 6 publications

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“…A callus is formed, but it cannot regenerate a new apical cell (Nemec, 1905). I n the former a new apex can be regenerated, whereas in the latter no regeneration can occur, since all the promeristem is removed in cutting away the apical cell.…”

Section: The Concept Of Initial Cellsmentioning

confidence: 99%

“…Some cells divide in only one plane and grow in only one direction. This can be seen by inducing mitosis in otherwise non-meristematic cells by using substances like indole acetic acid or 2-~-dichlorophenoxyacetic acid or by wounding (Nemec, 1905 ;Huskins, 1948;D'Amato, 1952). These properties are not inherent in the cells, for, under abnormal conditions, they behave differently.…”

Section: Differentiation I N T H E Meristemmentioning

confidence: 99%

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Apical Meristems of Roots

Clowes

1959

Biological Reviews

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Section: The Concept Of Initial Cellsmentioning

confidence: 99%

Section: Differentiation I N T H E Meristemmentioning

confidence: 99%

Apical Meristems of Roots

Clowes

1959

Biological Reviews

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“…The mature regions of the root are most active in salt transfer to the xylem (9,10). The protein content of root cells increases during expansive growth (1, 3,11,12). Ribonucleic (RNA) and de~oxyribonucleic acid (DNA) per cell have been ~-~ported maximal in the region of elongation (13, 1 t).…”

Section: Introductionmentioning

confidence: 99%

Biochemical and Cytological Changes Accompanying Growth and Differentiation in the Roots of Zea mays

Lund

Vatter

Hanson

1958

The Journal of Cell Biology

132

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The apical meristem of the root affords an excellent material with which to study changes in cellular components accompanying growth and differentiation. The ontogeny of cytoplasmic particles can be followed, since the younger cells are constantly dividing and reforming new cytoplasm. Electron microscope pictures of these newly formed cells reveal a dense background of microsomal granules and small, thin walled vesicles of the endophsmic retieulum. Two types of mitochondria are noted and, as the cells enlarge, mitochondria regarded as immature can no longer be seen, but only mitochondria with well developed cristae. The development of these cristae was found to be associated with an increase in respiration of the tissue as well as with increased rates of oxidation and phosphorylation of isolated mitochondria. As the cells grow and mature, the mitochondria make up an increasing percentage of the total cytoplasmic protein, and this increase probably a~counts to a great extent for the increase in tissue respiration. Concomitantly, there is a decrease in microsomal granules.All these changes have been verified by electron microscope pictures of cells in situ, chemical analysis of isolated particulates, and metabolic studies of tissue and isolated fractions.

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“…He interpreted this as evidence of protein synthesis coincident with enlargement. Other workers Frey-Wyssling, 1941, 1944;Brown and Broadbent, 1950;Burstrom, 1951;Morgen and Reith, 1954) also found synthesis of protein nitrogen during enlargement. However, Burstrom (1951) concluded that the elongation mechanism was not connected with new formation of cytoplasm.…”

Section: Introductionmentioning

confidence: 81%

Equational Relations Between Nutrient Quantities and Cellular Growth

Boss

1964

New Phytologist

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Summary The quantities of five nutrients (N, P, K, Mg, Ca) were estimated in enlarging maize root tip cells. When consecutive cell fresh weights were plotted against the total quantity of any one nutrient per cell a parabolic curve resulted which fits the expression: W = kXn, where W is the fresh weight per cell, X the nutrient quantity and n and k are constants. The inference that may be drawn is that, under a defined environment, cell weight and nutrient quantity are related to each other by a constant quantitative factor. Two equations are derived to support the above hypothesis and also to support a related hypothesis that there might exist a quantitative relationship between any one nutrient and all other nutrients in a given cell at any one time.

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The Compositions and Quantitative Relations of Protein and Related Fractions in developing Root Cells

Cited by 29 publications

References 6 publications

Apical Meristems of Roots

Apical Meristems of Roots

Biochemical and Cytological Changes Accompanying Growth and Differentiation in the Roots of Zea mays

Equational Relations Between Nutrient Quantities and Cellular Growth

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