Allocation of marked photoassimilated and sourcesink dynamics in fig trees cv. Roxo de Valinhos. 2. Allocation time

Abstract

The work evaluated the translocation and allocation period of the photosynthates, using the carbon-13 stable marker, in Ficus carica L. cv. Roxo de Valinhos plants in the reproductive stage. A fig tree leaf considered adult was enriched with ¹³CO₂ for 30 minutes in a controlled atmosphere and the respective plants were collected after 6, 24, 48, 72, 120, 168 and 360 hours of enrichment. After the specified times, the plants parts (apical meristem, leaves, shoots, stem and root system) were evaluated to characterize the natural and enrichment isotopes in a mass spectrometer of isotopic reason. Naturally, the plant presented values of relative enrichment of ?¹³C -27.92‰ (isotopic reference). The plant presented concomitant vegetative growth and
reproductive stage, showing predominance in the ¹³C allocation in the meristems areas, followed by the reproductive organs, having the root system as the main reserve organ.