Stimulation by abscisic acid of RNA synthesis in discs from healthy and tobacco mosaic virus-infected tobacco leaves
✍ Scribed by R. J. Whenham; R. S. S. Fraser
- Publisher
- Springer-Verlag
- Year
- 1980
- Tongue
- English
- Weight
- 433 KB
- Volume
- 150
- Category
- Article
- ISSN
- 0032-0935
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✦ Synopsis
U p t a k e o f abscisic acid from the culture m e d i u m by discs of healthy and tobacco mosaic virusinfected tobacco leaves was measured. Small (two to five-fold) increases in abscisic acid concentration in discs caused increases in rates of [3H]uridine and [3H]adenine i n c o r p o r a t i o n into total nucleic acid, virus R N A and host r i b o s o m a l R N A . Net accumulation of virus R N A was also enhanced by abscisic acid. This evidence for stimulation of R N A synthesis is c o m p a r e d with previous reports showing inhibition of R N A synthesis in other tissues. It is suggested that the increase in endogenous abscisic acid caused by tobacco mosaic virus infection m a y be at least partly responsible for observed increases in rates of R N A synthesis after infection.