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shi wu zhong ji zhong an ji suan dui jia ying luan chao fa yu de ying xiang
Pages: 803-814
Year: Issue:  6
Journal: Acta Entomologica Sinica

Keyword:  卵巢发育家蝇卵必需氨基酸蛋氨酸卵巢管苯丙氨酸食物精氨酸蔗糖nutrition;
Abstract: In the present study, a series of experiments was carried out to test the effects ofdifferent diets on the development of ovaries of the adult housefly. Three kinds of dietswere used in the experiments. They were: (1) 10% sucrose solution; (2) hen's eggsolution (one part of egg and three parts of water) plus 10% sucrose solution; (3) thesynthetic diet which was prepared according to the components of hen's egg, consistingof arachis oil, sucrose, vitamin B_1 and B_2, nicotinic acid, cholesterol, calcium phosphate,ferric phosphate and amino acid mixture (including arginine, histidine, lysine, isoleucine,leucine, phenylalanine, threonine, valine, tryptophane, methionine, glutamic acid, tyrosine,aspartic acid, cystine, alanine and glycine) plus 10% sucrose solution. In flies fed with hen's egg plus 10% sucrose solution, the ovaries developed nor-mally, the complete ovarian maturation occurred on the fifth and the eggs were laid onthe sixth day following emergence. The longevity of female flies was up to 55 days. The ovaries in the housefly are of the polytrophic type containing numerous ovarioles.Only one egg from each ovariole matures at one time and all the eggs in one fly areat the same stage of development. According to the size of the ovary and ovariole,amount of yolk deposited and the morphological alteration of the ovum and nurse cells,five more or less clear-cut stages of ovarian development have been established. In flies fed with sucrose solution, ovarian growth ceased at an early stage (stage Ⅱ). In flies fed with synthetic diets, the condition of the development of ovaries wasalmost the same as those flies fed with hen's egg solution, except the length of life wasslightly shorter (35 days in average). Therefore this defined diet is a nutritionally suf- ficient diet for maintaining the life of the adult housefly as well as for its ovariandevelopment. The main purpose of the present studies was to test the egg production of thehousefly on a synthetic diet in which the protein was replaced by amino acids and todetermine the so-called indispensable amino acid requirements for the development ofovaries of the adult housefly. It was found that arginine, lysine, tryptophane, phenyl-almine, threonine, leucine, isoleucine and valine are needed for ovarian development.The absence of any one of these eight amino acids apparently prevented the formationof eggs. As the ovaries could develop normally on histine- or methionine-free diets, itis assumed that the development of ovaries is not prevented by the omission of any ofthese amino acids from diet.
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