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Effect of some enzymes, chemicals and insecticides on the macromolecular structure of the froth of the spittlebug, the cercopid Deois sp

Author:
Mello, M.L.S.
Source:
Entomologia experimentalis et applicata 1987 v.44 no.2 pp. 139-144
ISSN:
0013-8703
Subject:
Deois, bubbles, butanol, collagenase, dioxane, ethanol, hyaluronoglucosaminidase, malathion, nymphs, pastures, pests, polarized light microscopy, proteoglycans, sodium dodecyl sulfate, structural proteins, testes, trypsin, urea
Abstract:
The action of trypsin, collagenase, testicular hyaluronidase, sodium dodecyl sulphate (SDS), urea, guanidinium-chloride (GnCl), n-butanol, dioxane, malathion, alkylphenolpolyglycol ether and iso-octylphenoxy-polyethoxy ethanol/dioctyl sodium sulphocyanate (v/v) on the macromolecular structure of the froth which covers the nymphs of Deois sp., a pest of pasture and agriculture, was studied using polarization microscopy. SDS, n-butanol, GnCl and iso-octyl-phenoxy-polyethoxy ethanol/dioctyl sodium sulphocyanate were the most efficient compounds at promoting disorganization and bursting of the froth bubbles at a relatively fast rate. Disorganization of the froth macromolecules could be visualized through attenuation or abolishment of the birefringence attributable to the high macromolecular orientation of structural proteins and proteoglycans in the wall of the froth bubbles.
Agid:
191023