1All India Co-ordinated Research Project on Agroforestry, Konkan Krishi Vidyapeeth, Dapoli-415712.
Division of Plant Physiology, Indian Agricultural Research Institute, New Delhi-110012
Labelled 14CO2 was fed to the fully opened tetrafoliate leaves of main stem of M-13 peanut (Arachis hypogaea L.), which were exposed to 75%, 50% and 20% light intensities continously and at different stages of plant growth. Translocation of assimilated 14C was measured from different parts of plant. As light intensity decreased, the translocation of assimilates to the pods also decreased proportionately. Reduction of light intensity at podding stage (70–105 DAS) showed that most of the assimilates were retained in fed leaves and only a small amount of assimilates were transported to pods. Reduction in light intensity at flowering and pegging or later pod filling stage had less effect on partitioning of assimilates than that given at podding stage. Translocation of assimilates at podding stage is one of the factor that limited yield under reduced light.
