ISHS Acta Horticulturae 381: International Symposium on Natural Phenols in Plant Resistance
CHLOROGENIC ACID - AN INDEPENDENT MORPHGENESIS REGULATOR OR A COFACTOR |
| Authors: | S. Lavee, N. Avidan, R.L.M. Pierik |
| DOI: | 10.17660/ActaHortic.1994.381.52 |
| Abstract:
The involvement of intermediates of the Cinnamic acid-lignin pathway on flower bud differentiation, rooting and callus development was studied. The endogenous level of CHA in olive (Olea europaea L.) leaves of fruit bearing trees was 3–4 times higher than the non bearing ones. Application of CHA decreased the amount of differentiating buds when injected prior to flower bud induction and had no effect when applied thereafter. The increase in the CHA level in leaves of fruiting trees was accompanied by an increase in total protein of those leaves. A quantitative change was found in proteins of 14, 32 and 60 Kd. The protein changes were specific according to cultivars. CHA could replace the auxin requirement for olive callus growth in vitro. A similar but weaker response was found with cinnamic acid. Quercus, Syringa, Fraxincus and Malus callus growth was promoted by some of the phenolic acids either with or without auxin. On the other hand the rooting ability of in vitro grown lilac shoots was enhanced by CHA and CAA when applied alone and even more so in the presence of auxin. Thus both an independent effect of the Cinnamate-lignin pathway acids and an interaction with auxin on growth and differentiation was found. | |
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