Effects of prostaglandins E, precursors and some inhibitors of prostaglandin biosynthesis on dark- and light-induced leaflet movements inCassia fasciculataMichx.
✍ Scribed by G. Roblin; J. Bonmort
- Book ID
- 104753282
- Publisher
- Springer-Verlag
- Year
- 1984
- Tongue
- English
- Weight
- 360 KB
- Volume
- 160
- Category
- Article
- ISSN
- 0032-0935
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✦ Synopsis
Prostaglandin E1 and prostaglandin E 2 speed up the dark-induced (scotonastic) and lightinduced (photonastic) leaflet movements of Cassia fasciculata. The precursors of prostaglandin biosynthesis, homo 7-1inolenic and arachidonic acids, and an intermediary product, prostaglandin-interm-5, act in the same manner on these movements. Inhibitors of prostaglandin biosynthesis, indomethacin and phenylbutazone, inhibited the scotonastic but promoted the photonastic movements in an unexpected way. Since the pulvinar movements are mediated by water and ion migrations, the observed modifications of these movements indicate that prostaglandins and their precursors may affect, as in animal cells, processes linked to a variation of membrane permeability.