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The effects of ozone episodes on autumn leaf fall in apple
Author(s) -
WILTSHIRE J. J. J.,
WRIGHT C. J.,
UNSWORTH M. H.,
CRAIGON J.
Publication year - 1993
Publication title -
new phytologist
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.742
H-Index - 244
eISSN - 1469-8137
pISSN - 0028-646X
DOI - 10.1111/j.1469-8137.1993.tb03833.x
Subject(s) - ozone , biology , horticulture , botany , environmental science , atmospheric sciences , meteorology , geography , geology
SUMMARY Mature apple ( Malm domestica Borkh.) trees were exposed to episodes of 100 and 150 nl l −1 ozone 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.