effect of zinc on histological changes in the fat body of the adult male odontopus varicornis (heteroptera: pyrrhocoridae) in relation to reproduction

The fat body of insect is functioning as a food reservoir and it serve as the precursor for metabolism in other tissues. It has derived from the mesoderm walls of coelomic cavities. The fat body of Odontopus varicornis is transparent yellow colored mass. The fat body contains three types of cells namely trophocyte, urocyte and mycetocyte. The fat body showed some marked changes in insects exposed to zinc. The vacuoles of trophocytes are disintegrated. swollen and irregular shaped nuclei are conspicuous. Mycetocytes are decreased in size. Urocytes are mostly disintegrated.