A study of the hypothetical role of cytokinins in completion of tRNA

A. Richmond; A. Back; Betsy Sachs

doi:10.1007/BF00389296

A study of the hypothetical role of cytokinins in completion of tRNA

A. Richmond, A. Back, Betsy Sachs

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Abstract

It has been suggested that the effect of cytokinins in retarding leaf senescence comes about through their incorporation into tRNA. To test this hypothesis, kinetin-8-¹⁴C, 6-benzylaminopurine-benzyl-7-¹⁴C and adenine-8-³H were applied to detached tobacco leaves, and the nucleic acids were thereafter extracted and chromatographed on MAK columns. Kinetin-8-¹⁴C and adenine-8-³H were readily incorporated into RNA in a similar pattern. 6-Benzylaminopurine-benzyl-7-¹⁴C was effective in delaying chlorophyll loss but was not incorporated into any nucleic-acid fraction. It is concluded that the possibility of cytokinins retarding leaf senescence by completion of tRNA is not supported.

Original language	English
Pages (from-to)	57-65
Number of pages	9
Journal	Planta
Volume	90
Issue number	1
DOIs	https://doi.org/10.1007/BF00389296
State	Published - 1 Mar 1969
Externally published	Yes

ASJC Scopus subject areas

Genetics
Plant Science

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10.1007/BF00389296

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title = "A study of the hypothetical role of cytokinins in completion of tRNA",

abstract = "It has been suggested that the effect of cytokinins in retarding leaf senescence comes about through their incorporation into tRNA. To test this hypothesis, kinetin-8-14C, 6-benzylaminopurine-benzyl-7-14C and adenine-8-3H were applied to detached tobacco leaves, and the nucleic acids were thereafter extracted and chromatographed on MAK columns. Kinetin-8-14C and adenine-8-3H were readily incorporated into RNA in a similar pattern. 6-Benzylaminopurine-benzyl-7-14C was effective in delaying chlorophyll loss but was not incorporated into any nucleic-acid fraction. It is concluded that the possibility of cytokinins retarding leaf senescence by completion of tRNA is not supported.",

author = "A. Richmond and A. Back and Betsy Sachs",

year = "1969",

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doi = "10.1007/BF00389296",

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AU - Richmond, A.

AU - Back, A.

AU - Sachs, Betsy

PY - 1969/3/1

Y1 - 1969/3/1

N2 - It has been suggested that the effect of cytokinins in retarding leaf senescence comes about through their incorporation into tRNA. To test this hypothesis, kinetin-8-14C, 6-benzylaminopurine-benzyl-7-14C and adenine-8-3H were applied to detached tobacco leaves, and the nucleic acids were thereafter extracted and chromatographed on MAK columns. Kinetin-8-14C and adenine-8-3H were readily incorporated into RNA in a similar pattern. 6-Benzylaminopurine-benzyl-7-14C was effective in delaying chlorophyll loss but was not incorporated into any nucleic-acid fraction. It is concluded that the possibility of cytokinins retarding leaf senescence by completion of tRNA is not supported.

AB - It has been suggested that the effect of cytokinins in retarding leaf senescence comes about through their incorporation into tRNA. To test this hypothesis, kinetin-8-14C, 6-benzylaminopurine-benzyl-7-14C and adenine-8-3H were applied to detached tobacco leaves, and the nucleic acids were thereafter extracted and chromatographed on MAK columns. Kinetin-8-14C and adenine-8-3H were readily incorporated into RNA in a similar pattern. 6-Benzylaminopurine-benzyl-7-14C was effective in delaying chlorophyll loss but was not incorporated into any nucleic-acid fraction. It is concluded that the possibility of cytokinins retarding leaf senescence by completion of tRNA is not supported.

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DO - 10.1007/BF00389296

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SN - 0032-0935

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A study of the hypothetical role of cytokinins in completion of tRNA

Abstract

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