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Light and Prometryne Effects on Leucine Uptake and Incorporation

Published online by Cambridge University Press:  12 June 2017

Bryan Truelove ,
Larry R. Jones  and
Donald E. Davis
Bryan Truelove
Affiliation:
Auburn Univ. Agr. Exp. Sta., Dep. of Bot. and Microbiol., Auburn, Alabama 36830
Larry R. Jones
Affiliation:
Auburn Univ. Agr. Exp. Sta., Dep. of Bot. and Microbiol., Auburn, Alabama 36830
Donald E. Davis
Affiliation:
Auburn Univ. Agr. Exp. Sta., Dep. of Bot. and Microbiol., Auburn, Alabama 36830
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Abstract

The effects on leucine uptake and its incorporation into protein by cucumber (Cucumis sativus L. ‘Ashley’) cotyledon tissue following treatments with 2,4-bis(isopropylamino)-6-(methylthio)-s-triazine (prometryne) were determined. Prometryne decreased 14C-leucine uptake both in the light and in the dark. Prometryne decreased leucine incorporation into protein only when the discs were also exposed to over 4 hr of light. Percent of absorbed leucine incorporated into protein was increased by a 4 hr exposure in the light to 10−4M prometryne following a 24-hr dark exposure to this same concentration. Similar exposure to 10~5M prometryne had no effect. Percent of leucine incorporated into protein was decreased by 10-5M prometryne following a 24 hr exposure to this same concentration in the light. However, under these conditions 10−4M prometryne had no effect. It is speculated that the increased percentage of leucine incorporated into protein may be related to increased availability of the absorbed leucine for use in protein synthesis rather than an effect of the herbicide on the rate of protein synthesis

Type
Research Article
Information
Weed Science , Volume 21 , Issue 1 , January 1973 , pp. 24 - 27
Copyright
Copyright © 1973 Weed Science Society of America 

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References

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