Abstract:
In Cerococcus ornatus, the same symbiote produces two colours, at different stages. The symbiote of C. hibisci, also produces a lighter and darker ochre colour. These are found on two separate forms of the insect. In this light the yellow and red forms of Kerria fici can also arise from the products of the same symbiote, but differently metabolized by the two forms of insects, the yellow and red. The Malpighian tubes of T. lobata has a purple colour, like that of the secretion coat of the insect; those of T. silvestrii have a yellow colour, and so is also the colour of its cell. The contents of Malpighian tube is a pigmented ether soluble resin. Mefatchardia conchiferata has a transparent resinous coat probably ether in-soluble. Its body fluid has a yellow dye. Cerococcus ceriferus is yellow coloured within. Its cover is soft wax. In all insects each has its special symbiote. The biogenesis of lac products must be traced to the initial substance sproduced by the symbiote of the insect. The ideal role of symbiote is seen in the case of Coriococcus species. The lac insect probably produces uric acid and also urea and the symbiotic yeast aldehydes of fatty acids. Thus a urea-aldehyde resin can be formed. The other fraction of lac is probably the same product further modified by the dermal glands all over the body. Thig results in its ether insoluble fraction.
Page(s):
223-228
DOI:
DOI not available
Published:
Journal: Pakistan journal of scientific research, Volume: 31, Issue: 3--4, Year: 1979