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Maintenance and constructive respiration, photosynthesis, and net assimilation rate in seedlings of pitch pine (Pinus rigida Mill.)Author(s): F. Thomas Ledig; A.P. Drew; J.G. Clark
Source: Ann. Botany 40(166):289-300
Publication Series: Miscellaneous Publication
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DescriptionPitch pine seedlins were grown at constant temperature and photoperiod. Net CO2-uptake h-1 g-1 leaves decreased stadily during ontogeny until leaf production ceased. Thereafter, there was no change or a slight increase. Though the 0ntogeneic pattern was the same in populations native to different geographic areas, there were differences among populations in the rate of CO2-uptake. Root respiration, calculated from the difference between CO2-uptake and net assimilation rate, accounted for 6 to 69 per cent of diurnal assimilation.
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CitationLedig, F. Thomas; Drew, A.P.; Clark, J.G. 1976. Maintenance and constructive respiration, photosynthesis, and net assimilation rate in seedlings of pitch pine (Pinus rigida Mill.). Ann. Botany 40(166):289-300
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