EFFECTS OF FRUITING ON SEASONAL LEAF AND WHOLE-CANOPY CARBON DIOXIDE EXCHANGE OF APPLE

J.N. Wünsche, J.W. Palmer
The seasonal effect of fruiting and environmental impacts on leaf and whole-canopy carbon dioxide exchange was examined using mature six-year-old ‘Braeburn’/M.26 apple trees. Crop load affected leaf- and whole-canopy net CO2 uptake. Differences in average canopy net CO2 exchange were partly explained by average canopy light interception and night-time air temperature. Mid-season decline in photosynthesis was associated with an increase in leaf starch concentration as crop load decreased, presumably due to a lower carbohydrate requirement at this growth period.
Wünsche, J.N. and Palmer, J.W. (1997). EFFECTS OF FRUITING ON SEASONAL LEAF AND WHOLE-CANOPY CARBON DIOXIDE EXCHANGE OF APPLE. Acta Hortic. 451, 295-302
DOI: 10.17660/ActaHortic.1997.451.34
https://doi.org/10.17660/ActaHortic.1997.451.34

Acta Horticulturae