scholarly journals Studies on the ovarian development in the housefly, Musca domestica vicina Macquart : IV. The function of fat body related with oogenesis

1977 ◽  
Vol 28 (2) ◽  
pp. 99-104 ◽  
Author(s):  
Hironori SAKURAI
Keyword(s):  
Musca Domestica ◽  
Ovarian Development ◽  
Fat Body

Oogenesis in Lucilia Cuprina (Wied.) (Diptera: Calliphoridae). Ii. The Effect of Aziridinyl Chemosterilants on Oogenesis.

1979 ◽  
Vol 27 (3) ◽  
pp. 349 ◽  
Author(s):  
GAC Beattie
Keyword(s):  
Direct Effect ◽  
Nurse Cell ◽  
Ovarian Development ◽  
Fat Body ◽  
Endocrine System ◽  
Lucilia Cuprina ◽  
Follicle Cells ◽  
Cell Nuclei

Inhibition of ovarian development in L. cuprina by two aziridinyl chemosterilants, N,N'-hexamethylenebis(1-aziridinecarboxamide) and N. N'bisaziridinyl-N"-cyclohexylphosphine sulphide, was due to the direct effect of the sterilants on the ovary. The sterilants caused infecundity by interfering with mitosis in the follicle cells. Contrary to the accepted view, no evidence was obtained to suggest that infecundity resulted from inhibition of endomitosis in the nurse cell nuclei. Neither sterilant prevented the digestion of protein by the midgut, nor did they prevent the endocrine system and fat body from functioning.

scholarly journals Ovarian Development and Vitellogenin Gene Expression under Heat Stress in Silkworm,Bombyx mori

2016 ◽  
Vol 2016 ◽  
pp. 1-8
Author(s):  
Satinath Paul ◽  
Bela Keshan
Keyword(s):  
Gene Expression ◽  
Heat Stress ◽  
Heat Shock ◽  
Reproductive Performance ◽  
Ovarian Development ◽  
Fat Body ◽  
Shock Treatment ◽  
Heat Shock Treatment ◽  
Vitellogenin Gene ◽  
Vitellogenin Mrna

The present study observed the effect of heat stress on ovarian development, fecundity, and vitellogenin gene expression in silkworm,Bombyx mori. The result showed that the heat shock treatment to spinning larvae and pupae at 39°C (1 h and 2 h) did not cause any adverse effect on the reproductive performance ofB. mori.However, the heat shock treatment at 42°C or above caused a decrease in the fecundity. The heat shock treatment to day 2 pupae for 2 h at 45°C caused a drastic effect on the development of ovary as measured by gonadosomatic index. The study thus showed that a brief exposure ofBombyxlarvae and pupae to a temperature of 42°C or higher, much prevalent in tropical countries like India, greatly affects the ovarian development and reproductive performance of this commercially important insect. The study further showed a developmental- and tissue-specific expression of vitellogenin mRNA in fat body and ovary upon heat shock. When heat shock treatment was done at 39°C and 42°C to spinning larvae, ovary showed an upregulation in the expression of vitellogenin mRNA, whereas fat body failed to do so. However, at 45°C, both fat body and ovary showed a downregulation. The heat shock treatment to day 2 pupae showed an upregulation in the vitellogenin mRNA expression in both fat body and ovary, even at 45°C. The upregulation in the expression of vitellogenin upon heat shock indicates its role in thermal protection ofBombyxlarvae and pupae.

Studies on ovarian development in tsetse flies (Glossina, Diptera)

Parasitology ◽  
1961 ◽  
Vol 51 (3-4) ◽  
pp. 545-564 ◽  
Author(s):  
D. S. Saunders
Keyword(s):  
Seasonal Variation ◽  
Ovarian Development ◽  
Fat Body ◽  
Fat Content ◽  
The State ◽  
Tsetse Flies ◽  
Pupal Development ◽  
Follicle Size ◽  
The Right ◽  
Egg Follicles

Five species of Glossina (G. morsitans, G. pallidipes, G. austeni, G. brevipalpis and G. palpalis) have ovaries containing two polytrophic ovarioles, each of which contains a single egg follicle. In all these species the right ovary is more highly developed than the left at emergence. This type of ovary is probably common to all species of Glossina.The development of the egg follicles in G. morsitans pupae is described. It is shown that the cycle of development whereby eggs are produced alternately from right and left ovaries is established during pupal development and that some yolk deposition has occurred in follicle A (right ovary) and follicle C (left ovary) before the fly emerges from the puparium.In G. morsitans, it is shown that the size of the egg follicles in newly emerged flies is correlated with the size (R.D.W.) of the fly, larger females having more yolk laid down in their follicles before emergence. This is probably correlated with the state of reserves in the fat body. It is also shown that there is a seasonal variation in follicle size in newly emerged flies, this variation is probably correlated with variations in temperature acting upon wild females during pregnancy and upon the pupae, as temperature is known to affect both size and fat content of wild tsetse flies.

The relationship between nutrition, vitellogenin, vitellin and ovarian development in the housefly, Musca domestica L.

1985 ◽  
Vol 31 (9) ◽  
pp. 715-722 ◽  
Author(s):  
Noriaki Agui ◽  
Masakazu Takahashi ◽  
Yoshito Wada ◽  
Susumu Izumi ◽  
Shiro Tomino
Keyword(s):  
Musca Domestica ◽  
Ovarian Development ◽  
The Relationship

The Reproductive Capacity of the Larch Sawfly and Some Factors of Concern in its Measurement

1966 ◽  
Vol 98 (6) ◽  
pp. 561-578 ◽  
Author(s):  
R. J. Heron
Keyword(s):  
Egg Production ◽  
Ovarian Development ◽  
Fat Body ◽  
Adult Emergence ◽  
Individual Variability ◽  
Reproductive Capacity ◽  
Appreciable Effect ◽  
Larval Stages ◽  
Larch Sawfly ◽  
The Individual

AbstractOvarian development and egg production in the larch sawfly, Pristiphora erichsonii (Hartig), were studied in the development of a method for measuring reproductive capacity for population studies. Most of the oöcytes are mature at the time of adult emergence but some mature in the following few days. Quantitative differences in foliage consumption during the larval stages have an appreciable effect on egg production but normal environmental temperature differences and exposure to flooding during the spring development period influence ovarian development only to a limited extent.Reproductive capacity can be determined by oöcyte counts of dissected adults of uniform age. The sample size necessary for estimates of various degrees of precision was calculated.Several size measurements have a significant correlation with the numbers of oöcytes produced. The regression of numbers of oöcytes on adult weight is of limited usefulness in the estimation of reproductive capacity. This is largely due to the individual variability in the extent to which fat body tissue is utilized in ovarian development particularly in the case of the larger adults.

Volume of fat body and ovarian development in adult houseflies irradiated as pupae or adults

1971 ◽  
Vol 17 (1) ◽  
pp. 159-168 ◽  
Author(s):  
H.M. Flint ◽  
D.R. Nelson ◽  
T.S. Adams
Keyword(s):  
Ovarian Development ◽  
Fat Body
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