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Carbon Partitioning Among Leaves, Fruits, And Seeds During Development Of Phaseolus Vulgaris L., Donald Geiger, Wen-Jang Shieh, Rose Saluke
Carbon Partitioning Among Leaves, Fruits, And Seeds During Development Of Phaseolus Vulgaris L., Donald Geiger, Wen-Jang Shieh, Rose Saluke
Donald R. Geiger
Development of vegetative and floral buds was found to be a key factor in establishing the way carbon is distributed among growing leaves and fruits inPhaseolus vulgaris L. plants. Leaves emerged principally during a period 14 to 32 days after planting while flowers were produced during a 10- to 12-day period near the end of leaf emergence. Timing of anthesis established the sigmoidal time course for dry weight accumulated by the composite of all fruits on the plant. During the first 12 days following anthesis, fruit growth mainly consisted of elongation and dry weight accumulation by the pod wall. Thereafter, …
Analysing Partitioning Of Recently Fixed And Of Reserve Carbon In Reproductive Phaseolus Vulgaris L. Plants, Donald Geiger, Wen-Jang Shieh
Analysing Partitioning Of Recently Fixed And Of Reserve Carbon In Reproductive Phaseolus Vulgaris L. Plants, Donald Geiger, Wen-Jang Shieh
Donald R. Geiger
Partitioning of recently-fixed carbon among plant organs and subsequent distribution of reserve carbon were studied by supplying whole shoots of bean plants (Phaseolus vulgaris L.) with 14C-labelled CO2 of constant specific radioactivity throughout a photoperiod. The gain of tracer carbon in each part revealed net accumulation of recently-fixed carbon from direct fixation, import or both. Growth rate coefficients describing the present pattern of plant growth were calculated from ratios of tracer carbon to total carbon present in plant organs and were used to project future plant form. The period 10–20 d after the start of flowering was marked by a …