Alocação de fotoassimilados marcados e relação fonte-dreno em figueiras cv. Roxo de Valinhos. 2. Tempo de alocação

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 13CO 2 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 δ 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.