Document Type : Research Paper

Author

Anbar University - College of Education for women

10.37652/juaps.2010.15460

Abstract

The aim of this study is to evaluate the effect of cadmium on the secretion of goblet cell of the
epidermis in earth worm Aporrectodea caliginosa under laboratory conditions. Thirty active adult worms were used in
the study which were divided in to four groups in addition control group each with 150g of soil.The following
concentrations of cadmium in the soil were (100,200,300,400 and 500) ppm .The experiment lasted for thirty days
.The results showed that there is reverse relationship between the cadmium concentrations and cells response degree .It
is found that the EC50 effective concentration is 500ppm.The results also showed that the cadmium has a direct effect
on the goblet cell in the epidermis .The study demonstrated that there is a decrease in the cells dimension and the
appearance of the empty spaces inside them as a result of the emergence of mucus materials on the body surface of the

Main Subjects

     1-Georg. W. Dickerson, (1999). vermicomposting, (NMSU) Extension Guide. Science 110:25-29.
     2-Ali,A,A.,(1988).Some histological& histochemical aspects of the  epidermal &clitellar epithelium in two earthworm species. M.Sc. thesis. Mosul univ.
     3-Abid,A.J.,(1996).Effect of desssication on brain neuroscretory cell of the earthworm. AlQad. Sci. J. (11)57-63.   
     4-Hansman,K.(1982).Electron microscopic studies on Anatides mucosa cuticle and cilia mucous cells and mucosa extraction .Helogl meeresunters,35:79-96.                              
     5-Scott-Fordsmand,J.J,Weeks,J.M.(2000).Biomarkers in earthworm. Environmental contamination toxicology. 165:17-59.
     6.Sala,O.E.,Chapin,F.S.Armesto,J.J.Berlow(2000).Global biodiversity  scenarios for their 2100.Science 287:1770-1774.
     7-Tatur,A. and Stassiak,K.(1985).Factor affecting nutrient budget inlackes of the R.Jorka watershed (Masurian Lakland ,Poland) IV. heavy  metal lacustrine sediments.
     8-Shiber,J.G.(1985). Trace metals in edible crustaceans from Lebanon Symp. Biol. Hung., 292:285-295.
     9-Manson ,C.F. (1981).Biology of freshwater pollution ,Logman group limited. England: 250PP.
     10-Lau,S.;Mohamed,M.and Sauts,S (1995). Profile of heavy metal in water and bottom sediment of Sg. Sarawak. Malaysium chem.conger;1-7.                                                  
     11-Bervoets,L.;Pains,L.I. and Verheyen, R. (1994). Trace metal levels in water, sediments and chironoomus GR. Thumni from different water courses on flanders (Belgium). chemosphere, 29:1591-1601.
     12-Casselman,W.G.(1962). Histochemicaltechningue, 2ndedition .London, Methuen.
     13-Pollino,C.A. and Hold way,D.A.(1999). Potential of two Hydra species as standard toxicity test animals ecotoxicol-Environ.Saf.43:309-316.
     14-lock R.A.and Overbeek,(1980).Effects of mercuric chloride and methylmercuric chloride on mucus secretion in riqnbow trout Salmo  gairdneri Richardson .comp.bio.physiol.690.PP.67 73.
     15-Khalil,M.A.Abdel.Lateif,H.M.Bayoumi,B.M.van straalen.(1996). Effects of metals and metal mixtures on survival and cocoon production of the earth worm Aporrectodea caliginosa .Pedobiologia 40:548-556.
     16-Brewer,S.K. Little E.E.,Delonay,A.J.,Beaurais,S.L. (2001) Behaviors dysfunctions correlate to alternal physiology Rainbove trout exposed to cholinesterase inhibition chemicals Arch Environ. Contam. Toxicol.40(1)70-76.