ISHS Acta Horticulturae 463: VIII International Symposium on Plant Bioregulation in Fruit Production
CHANGES IN ABSCISIC ACID CONCENTRATIONS UNDER EXTREME DROUGHT CONDITIONS IN SOME PEACH CULTIVARS |
| Authors: | N. Kaynas, K. Kaynas Atatürk |
| Keywords: | Prunus persica, rootstock, drought, Abscisic acid, relative water content |
| Abstract:
Water stress causes the endogenous level of abscisic acid (ABA) to increase rapidly in many plants. The aim of this study was to determine the relative water content (RWC) and endogenous ABA content changes of Early Red, Redhaven, J. H. Hale and Rio-Oso-Gem peach cultivars grafted on seedling Gf-305 and Nemaguard rootstocks under extreme drought conditions. RWC and ABA contents of these combinations were determined under four different stress conditions. In all peach variety/rootstock combinations, as the water content of plants decreased, the leaf RWC also decreased, but leaf ABA content increased. The highest ABA content was observed in the least watered plants. However, relationships between variety/rootstock combinations and changes in ABA contents were not stable. | |
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