Effect of heavy metal zinc on histological changes in the marg's of adult male laccotrephes ruber (Linn.) (Heteroptera: Nepidae) in relation to reproduction

摘要

The male accessory reproductive glands are derived either from mesoderm or ectoderm. MARG's are involved in various reproductive functions such as sexual excitement, mating, oviposition, transfer of sperm through seminal fluid and gonadial development.The MARG's showed some marked changes in insects treated with heavy metal mercury (25 ppm median lethal concentration). In treated insects shows necrotic and karyolysed columnar epithelial cells, decreased nuclear size and volume, clumping of chromatidsand less amount of secretory substances in the lumen of the MARG's.