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- Title
Modalités de l'inhibition de la croissance et de la synthèe des acides nucléiques des plantules de blé par l'acide abscissique.
- Authors
Belhanafi, A.; Collet, G. F.
- Abstract
The growth of wheat seedling (Triticum sativum) is inhibited by abscisic acid (ABA). The inhibition increases with the concentration of ABA (from 10-6M to 5 × 10-5M) and is stronger in the case of coleoptiles and first leaves than in roots. In contrast, naphthaleneacetic acid (ANA), at 10-5M, exerts its greatest inhibitory effect on the roots. The inhibitory effect of ABA on coleoptiles can be partially overcome by kinetin and to a much smaller degree by gibberellic acid. Neither of these two compounds, at 10-5M, had any effect on the ABA-induced inhibition of root growth. The RNA and DNA contents per plant organ are considerably reduced after treatment of the seedlings with ABA, particularly in the coleoptiles and the first leaves. The incorporation of uracil-2-14C and uridine T (G) into RNA of treated seedlings is reduced in the case of coleoptiles and first leaves, but considerably enhanced in roots. The mechanism of the action of ABA is discussed in the light of these results.
- Subjects
WHEAT; SEEDLINGS; ABSCISIC acid; EFFECT of acids on plants; ROOT growth; PLANT physiology
- Publication
Physiologia Plantarum, 1970, Vol 23, Issue 4, p859
- ISSN
0031-9317
- Publication type
Article
- DOI
10.1111/j.1399-3054.1970.tb06483.x