The Effects of Ozone Episodes on Autumn Leaf Fall in Apple

Mature apple (Malus domestica Borkh.) trees were exposed to episodes of 100 and 150 nl l-1ozone in 1990 and 1991 respectively, in open-top chambers at the University of Nottingham, Sutton Bonington Campus, UK. The episodes were for 8 h daily and for not more than 3 d in succession, with a seasonal t...

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Bibliographic Details
Published in:The New phytologist 1993-07, Vol.124 (3), p.433-437
Main Authors: Wiltshire, J. J. J., Wright, C. J., Unsworth, M. H., Craigon, J.
Format: Article
Language:English
Subjects:
Age structure
Agronomy. Soil science and plant productions
Animal, plant and microbial ecology
apple
Applied ecology
Biological and medical sciences
Ecotoxicology, biological effects of pollution
Effects of pollution and side effects of pesticides on plants and fungi
Fruit trees
Fundamental and applied biological sciences. Psychology
Horticulture
Leaf abscission
leaf fall
Leaves
Malus domestica
mature tree
open‐top chamber
Ozone
Ozone episodes
Plant interaction
Plants
Tree growth
Trees
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Summary:Mature apple (Malus domestica Borkh.) trees were exposed to episodes of 100 and 150 nl l-1ozone in 1990 and 1991 respectively, in open-top chambers at the University of Nottingham, Sutton Bonington Campus, UK. The episodes were for 8 h daily and for not more than 3 d in succession, with a seasonal total of 37 d in each year. Leaf fall was monitored by counting leaves on marked shoots at frequent intervals. A significant interaction between ozone exposure and leaf age was observed: exposure to ozone accelerated autumn leaf fall in old leaves. The relationships between experimental conditions, leaf age and plant material are discussed, and the implications for UK flora are considered.
ISSN:0028-646X
1469-8137
DOI:10.1111/j.1469-8137.1993.tb03833.x