Relationship of seasonal changes in endogenous plant hormones and alternate bearing of olive trees

Changes in hormone concentrations in leaf, node, shoot tip, and fruit samples of three Turkish olive (Olea europaea L.) cultivars ('Gemlik', 'Memecik', and 'Tavsan Yuregi') were monitored at monthly intervals over two successive years of the alternate-bearing cycle. Con...

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Bibliographic Details
Published inHortScience Vol. 39; no. 5; pp. 987 - 990
Main Authors Baktir, I, Ulger, S, Kaynak, L, Himelrick, D.G
Format Journal Article
LanguageEnglish
Published Alexandria, VA American Society for Horticultural Science 01.08.2004
Subjects
Agronomy. Soil science and plant productions
Biological and medical sciences
Fundamental and applied biological sciences. Psychology
ABA
Oleaceae
Horticulture
Olea europaea
auxin
IAA
Bearing
Endogenous
cytokinin
gibberellin
Seasonal variation
Dicotyledones
Angiospermae
abscisic acid
Spermatophyta
GA
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Summary:Changes in hormone concentrations in leaf, node, shoot tip, and fruit samples of three Turkish olive (Olea europaea L.) cultivars ('Gemlik', 'Memecik', and 'Tavsan Yuregi') were monitored at monthly intervals over two successive years of the alternate-bearing cycle. Concentrations of abscisic acid (ABA), indole acetic acid (IAA), gibberellic acid-like substances (GA), and kinetin-like cytokinin were determined and their relationship to flower bud formation were examined during "on" and "off" years. Results showed significant differences in IAA, ABA, GA3-like, and kinetin-like cytokinins between "on" and "off" cropping years in various tissues of olive trees. Relative balances between GA3-like and ABA concentrations of tissues appears to exhibit evidence of being a key regulator of floral development and alternate bearing.
ISSN:0018-5345
2327-9834
DOI:10.21273/hortsci.39.5.987