Work

Seasonal Changes in the Physiology of Vegetative Buds of Normal and Bud-failure Affected ‘Nonpareil’ Almond Trees1

Year: 1979

Type: article

Abstract: Vegetative buds from ‘Nonpareil’ almond trees affected by noninfectious bud-failure with (BF) and without (non-BF) symptoms were compared to plants without noninfectious bud-failure (normal). Samples were collected every 2 weeks from June until the following March to establish seasonal trends in weight and abscisic acid (ABA) and gibberellins (GA). Increases in bud fresh and dry weight occurred during July and August, followed by progressive dehydration up to the end of September. These changes were accompanied first by an increase in ABA and GA-like activity, and then a decrease in both hormones. During the remainder of the year (October to January) bud weight increased gradually and ABA and GA were low. Buds from BF and non-BF plants increased in weight in July and August, but much less than the normal. ABA levels were much less than from the normal, but the GA activity was comparable to normal. BF symptom development is characterized by lower production of ABA during the critical July-Aug. period. A disruption of the normal rest induction and recovery pattern was also hypothesized.

Source: Journal of the American Society for Horticultural Science

DOI: 10.21273/jashs.104.3.371

Authors: Rachid Hellali, D. E. Kester, G. C. Martin

Institution: University of California, Davis

Language: English

Topic: Plant Physiology and Cultivation Studies

Subfield: Plant Science

Field: Agricultural and Biological Sciences

Domain: Life Sciences

SDG: Zero hunger

Open Access status: hybrid

Estimated APC paid: $3,500