Articles
SEASONAL CHANGES IN PHOTOSYNTHESIS OF THE NON-ASTRINGENT PERSIMMON CULTIVAR FUYU IN SUBTROPICAL AUSTRALIA
Article number
436_37
Pages
339 – 344
Language
Abstract
Seasonal changes in net carbon dioxide assimilation (A) were measured over 2 season in a high-yielding ‘Fuyu’ orchard at Palmwoods, Queensland, Australia.
Similar patterns of A were recorded in both seasons with only one peak, occurring between 8-11 weeks after full bloom.
The peak in A appears to coincide with the period of maximum root growth and stage II of fruit growth.
A rates were positively correlated with leaf N (r = 0.85, P<0.05), and moderately negatively correlated with leaf starch (r = -0.82, P <0.05) and specific leaf weight (r = -0.58, P<0.05), indicating an inhibitory feedback mechanism.
Specific leaf weight and leaf starch were highly positively correlated (r=0.92, P<0.05). The study suggests that maintaining leaf N within a desirable critical range may be important for maximising fruit growth and for the accumulation of starch reserves for next season crop.
Similar patterns of A were recorded in both seasons with only one peak, occurring between 8-11 weeks after full bloom.
The peak in A appears to coincide with the period of maximum root growth and stage II of fruit growth.
A rates were positively correlated with leaf N (r = 0.85, P<0.05), and moderately negatively correlated with leaf starch (r = -0.82, P <0.05) and specific leaf weight (r = -0.58, P<0.05), indicating an inhibitory feedback mechanism.
Specific leaf weight and leaf starch were highly positively correlated (r=0.92, P<0.05). The study suggests that maintaining leaf N within a desirable critical range may be important for maximising fruit growth and for the accumulation of starch reserves for next season crop.
Publication
Authors
A.P. George, A.D. Mowat, R.J. Collins
Keywords
Diospyros kaki, fruit growth, Fuyu persimmon, photosynthesis
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