Ribonucleic Acid and Protein Synthesis as Essential Processes for Cell Elongation

Key, Joe L.

doi:10.1104/pp.39.3.365

Cited by 185 publications

(79 citation statements)

References 28 publications

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“…Similar objections can be raised to the work on cell elongation (8,18). Specificity as to the enzymes involved in the inhibition has been shown in a more definitive way in higher plants for th'e de novo syn'thesis of amylase (26).…”

Section: Discussionmentioning

confidence: 88%

“…Inhibition of the light-induced synthesis of enzymes for the cyanidin type by actinomycin and azaguanine stiggests that the production of mRNA is a limiting factor (5,8,9,25). The light independent synthesis of apigeninidin and luteolinidin, on the 'other hand, are not inhibited, and may even be accelerated by the addition of these compounds.…”

Section: Discussionmentioning

confidence: 99%

“…In noninfiltrated internodes kept in bright light in air, cyanidin production started around 6 hours and increased rapidly for 2 days ( (2,5,8,11,13,15,27). Ethionine r-ay also form inactive proteins (11).…”

Section: Methodsmentioning

confidence: 99%

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Regulatory Mechanisms in Anthocyanin Biosynthesis in First Internodes of Sorghum vulgare: Effect of Presumed Inhibitors of Protein Synthesis

Stafford

1966

Plant Physiol.

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Summary. There was a 6 to 24-hotr lag in the production of anthocyanins in the l:ght after excision of 4-day-old etiolated internodes of Sorghum vu'g(gre variety Whea&-> land milo. In internodes infiltrated with water, ap geninidin was formed first at 19 'o 24 hours and continued to be produced slowly. Luteolinidin was formed slightly later, but its formation rapidly exceeded that of apigeninidin. Cyanidin was the last type to be produced, but equaled the amounts of luteolinidin by 4 days. In noninfiltrated internodes, the production of cyanidin was greatly accelerated, beginning at about 6 hours.Data from experiments with inhibitors that presui-ably affect protein synthesis at different loci indicated that protein synthesis was necessary for maximum production of all 3 anthocyanins, but that {different steps were rate limiting. Light independent synthesis of ap:geninidin and luteolinidin was inh:;Wted by chloramphencol and L-ethionine but not by actinomycin D and 8-azaguanine. liowever, the synthesis of these 2 anthocyanins was not inhibited 'by puromycin, but was sometimes stimulated. The lightinduced synthesis of cyanidin was inhibited by actinomycin, azaguanine, chloramphenicol and ethionine. Actionmycin no longer was inhib tory if added after incubation for 6 hours in air. All inhibi'tors were capable of inhibiting to various degrees either the incorporation of 14C-uracil into RNA or 14C-leucine into protein. The inhibitor data suggest that the light insensitive synthesis of apIgeninidin andl ltteolinidin may be controlled by enzyme synthesis at the level of ribosomes via stable mRNA, while the light-induced production of cyanidin is dependent initially on the production of mRNA. The latter hypothesis is similar to that recently proposed by Lange and Mohr for a cyanidin produced in Siniapis seedlings.

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Section: Discussionmentioning

confidence: 88%

Section: Discussionmentioning

confidence: 99%

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Regulatory Mechanisms in Anthocyanin Biosynthesis in First Internodes of Sorghum vulgare: Effect of Presumed Inhibitors of Protein Synthesis

Stafford

1966

Plant Physiol.

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“…The existence of a dynamic state and a repression phenomenon involving enzyme activities on the cell wall synthesis pathway might explain the dependence of cell enlargement upon protein synthesis that is indicated by inhibitor experiments (9, 11: fig 5-8) and the promotive effect of auxin that has been reported on nucleic acid metabolism (9,10).…”

Section: Methodsmentioning

confidence: 99%

“…The growth rate was much reduced and the photosynthetic pigment system was highly bleached (9). Further consideration of the growth data and the finding that allantoin accumulated in the medium during growth of Agmenellum quadriplaticum, strain PR-6 (9) led to the supposition that the initial oxidative attack on uric aci(l was nonenzymic and was perhaps a property of certain blue-green algae independent of their ability to utilize uric acid as the sole nitrogen source.…”

mentioning

confidence: 99%

Relation between Effects of Auxin on Cell Wall Synthesis and Cell Elongation

Baker

Ray

1965

Plant Physiol.

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Modulation of gene expression by auxin

Key

1989

BioEssays

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Auxin, a class of plant hormones which affects a wide array of growth and developmental processes including cell elongation and cell division, alters gene expression in a very rapid, selective, and dramatic way. The relative level of some mRNAs decreases several fold, while that of other mRNAs increases many fold. These changes are mediated, at least in some cases, by very fast (within 5-10 min) modulation by auxin of transcription as measured by run-off transcription assays using nuclei isolated from control and auxin-treated tissues. Rapid turnover of mRNAs following auxin treatment also contributes to large changes in steady state concentration in some cases. The data are suggestive of multiple and complex mechanisms of regulation of expression of those genes which have been studied, using cloned cDNAs for direct quantitation of mRNA steady state levels and relative transcription rats. While there is no definitive evidence that auxin-regulated gene expression mediates any of the growth responses effected by auxin, several lines of evidence are supportive of a very close relationship between these processes. The working hypothesis is that there is a causal relationship between the effects of auxin on gene expression and at least some of the physiological and growth responses to auxin.

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Ribonucleic Acid and Protein Synthesis as Essential Processes for Cell Elongation

Cited by 185 publications

References 28 publications

Regulatory Mechanisms in Anthocyanin Biosynthesis in First Internodes of Sorghum vulgare: Effect of Presumed Inhibitors of Protein Synthesis

Regulatory Mechanisms in Anthocyanin Biosynthesis in First Internodes of Sorghum vulgare: Effect of Presumed Inhibitors of Protein Synthesis

Relation between Effects of Auxin on Cell Wall Synthesis and Cell Elongation

Modulation of gene expression by auxin

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