Abstract
SummaryGas-exchange readings as well as dry-matter production and distribution measurements were taken for determining optimum source-sink interactions of ‘Williams’ tissue culture banana plants over a whole crop cycle. Net assimilation rate (NAR), crop growth rate (CGR) and relative growth rate (RGR) were calculated. The results were supported by carbohydrate analysis and the monitoring of 14C-assimilates translocated throughout the plant. High NAR, CGR, RGR and photosynthesis rates (A) were measured during summer and low rates during winter. Growth parameters and CO2 assimilation increased into the second-summer growing season, but quickly declined during the last three months prior to harvest. This was attributed to an aging and rapidly depleting leaf area after flowering. Changes in the sink strength of the leaves and pseudostem during vegetative growth were shown, as with the rhizome during flowering, and the bunch before harvest. The most important sinks for 14C-assimilates during vegetative growth ...
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