Title: Photosynthetic Characteristics of Hanfu Apple Tree in Different Root-zone Space
Abstract: The objective of this study was to investigate the effect of different root-zone space on the photosynthetic characteristics of Hanfu apple and to provide a useful study for restricted-root cultivation.Hanfu apple tree was used to investigate the photosynthetic characteristics in different root-zone space with a CIRAS-1 photosynthesis system.The results showed that chlorophyII content,the net photosynthetic rate(Pn),photosynthetic capacity,carboxylation efficiency(CE),apparent quantum yield(AQY) and maximum regeneration rate of RuBP for Hanfu plants in large pot were higher than those in small pot.The diurnal variation of net photosynthetic rate presented double-peak during daytime,the first peak occurred at 10:00 a.m.,the second peak occurred after 15:00 p.m.,and decreased at noon.Stomata conductance(Gs) and intercellar CO2 concentration(Ci) of plant in large pot were higher than those of plant in small pot.Differences of photosynthetic characteristics in different root-zone space were mainly caused by stomatal factors.
Publication Year: 2007
Publication Date: 2007-01-01
Language: en
Type: article
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