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Red-light-enhanced conversion of tritiated gibberellin A9into other gibberellin-like substances in homogenates of etiolated barley leaves

✍ Scribed by D. M. Reid; M. S. Tuing; R. C. Durley; I. D. Railton

Publisher: Springer-Verlag
Year: 1972
Tongue: English
Weight: 413 KB
Volume: 108
Category: Article
ISSN: 0032-0935
DOI: 10.1007/bf00386507

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✦ Synopsis

Irradiation of homogenates of etiolated barley leaves with red light resulted in an increase in the levels of gibberellin (GA)-like substances as compared to dark controls. When homogenates were fed with [3HJ-GA~ there was an incorporation of the radioactivity into a number of other GA's: this process occurred to a greater extent in red light than in darkness, and could be inhibited by boiling the extract prior to addition of the [att]-GAp.

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Homogenates of etiolated wheat leaves contain increased levels of acidic gibberellin (GA)-like substances following treatment with red light. Differential centrifugation of homogenates indicates that the response is confined to the 1000 g (or plastid) fraction. Irradiation of suspensions of intact e