Seasonal Development of Symptoms of Noninfectious Bud-failure in Almond (Prunus amygdalus Batsch)1
| Autor: | Rachid Hellali, D. E. Kester, K. Ryugo |
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| Rok vydání: | 1976 |
| Předmět: | |
| Zdroj: | Journal of the American Society for Horticultural Science. 101:494-497 |
| ISSN: | 2327-9788 0003-1062 |
| Popis: | Shoots of ‘Nonpareil’, ‘Jordanolo’ and their hybrid progenies expressing bud-failure symptoms grew more vigorously and longer than those of normal plants. Viability of lateral buds decreased on abnormal shoots during the summer prior to bud failure, whereas those on normal shoots retained their viability. On abnormal shoots there was an increasing trend of bud-failure from the basal portion to the shoot tip. When propagated in a control nursery, buds collected from trees growing in a warmer area exhibited more bud-failure than those from a cooler zone. When shoots collected over the season from the above trees were treated with potassium salt of gibberellic acid, the inhibition of budbreak was proportional to hormone concentration; the treatment resulted in fewer bud breaks in abnormal shoots than normal ones. Bioassays of extracts from shoot apices from normal and abnormal shoots revealed large variation in hormonal levels. |
| Databáze: | OpenAIRE |
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