Control of midgut invertase activity in Periplaneta americana: the possible non-exocrine role of the salivary glands
Agrawal, OP.; Bahadur, J.
Journal of Insect Physiology 275: 293-295
When the salivary glands of 10-day-old adults of Periplaneta americana (L.) were removed, a gradual decline in mid-gut invertase activity occurred. No such effect occurred in cockroaches whose salivary ducts were severed. An injection of salivary gland extract in the haemocoel of salivarectomised insects caused the re-establishment, to a large extent, of the normal mid-gut enzyme levels.