Effect of abscisic acid and auxin on ribonuclease during ageing of bean endocarp tissue sections |
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Authors: | De LEO PIETRO; SACHER JOSEPH A |
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Institution: | Department of Botany, California State College Los Angeles, California 90032, U.S.A. |
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Abstract: | The activity of RNase increases rapidly upon cutting sectionsof bean (Phascolus vulgaris L. var. Kentucky Wonder) endocarp,peaks within 4 to 8 hr and then declines. This rapid developmentof RNase activity is inhibited by cycloheximide. Auxin (naphthaleneaceticacid, NAA) accelerates the rate of decline of RNase. Abscisicacid (ABA) enhances the level of RNase between 4 and 24 hr,associated with a decline in RNA, and this effect of ABA isobscured in the presence of auxin.
1 This work was supported by National Science Foundation Grant(GB-8316) to J. A. Sacher.
2 On leave from Laboratorio di Radiobiochimica ed EcofisiologiaVegetale, C. N. R., Roma, (Italy), with a Fellowship supportedby North Atlantic Threaty Organization.
3 Present address: Instituto di Botanica, Universita di Ban,Bari, 70126, Italy. (Received April 1, 1971; ) |
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