Accumulation of Glycine in the Fat Body of the Silkworm, Bombyx mori L.

Nature ◽  
1967 ◽  
Vol 216 (5113) ◽  
pp. 386-387
Author(s):  
C. CHITRA ◽  
M. B. SHYAMALA
Keyword(s):  
Bombyx Mori ◽  
Fat Body ◽  
Bombyx Mori L ◽  
Silkworm Bombyx Mori

scholarly journals Changes in the total protein, carbohydtate and lipid contents in selected tissues of silkworm, Bombyx mori L. under the influence of a juvenoid R394

2017 ◽  
Vol 16 ◽  
pp. 27
Author(s):  
K. Sashindran Nair ◽  
Jula S. Nair ◽  
V.A. Vijayan
Keyword(s):  
Protein Content ◽  
Bombyx Mori ◽  
Total Protein ◽  
Fat Body ◽  
Silk Gland ◽  
Total Carbohydrate ◽  
Primary Metabolites ◽  
Lipid Contents ◽  
Bombyx Mori L ◽  
Silkworm Bombyx Mori

A juvenoid. R394 (Ethyl 9-cyclohexyl-3,7-dimethyl-2,4-nonadienoate) was applied topically to 5th instar silkworm, Bombyx mori L. larvae (Hybrid: KA x NB4D2) at a dose of 0.039 nl/larva at 24, 48, 72 and 96 h, for silk yield improvement. Three major selected tissues viz., posterior silk gland (PSG), haemolymph and fat body were collected from fully-grown larvae and the total protein, total carbohydrate and total lipid contents were estimated following standard procedures. The result indicated that the content of these primary metabolites varied significantly in the selected tissues depending on the time of juvenoid application. The highest protein content was observed in the haemolymph and silk gland in the larvae treated at 72 h whereas the fat body protein content was lowest for the same treatment. The total carbohydrate was recorded lowest in the 72 h treated larvae as against the highest in the control both in haemolymph and fat body with no significant change in PSG. The total lipid content did not show any notable variation in the concentration on juvenoid administration except in the silk gland treated up to 72 h which showed a decline. The results indicate that the juvenoid induces tissue-specific responses in terms of turnover in primary metabolites which commensurates with the corresponding changes observed in the cocoon weight and cocoon shell weight.

Photoperiod effect on larval-pupal characters, fat body nucleic acids and protein of silkworm, Bombyx mori L.

1994 ◽  
Vol 15 (02) ◽  
pp. 129-137
Author(s):  
S. Janarthanan ◽  
M. Sathiamoorthi ◽  
K. M. Subbu Rathinam ◽  
M. Krishnan
Keyword(s):  
Nucleic Acids ◽  
Bombyx Mori ◽  
Fat Body ◽  
Bombyx Mori L ◽  
Silkworm Bombyx Mori

scholarly journals Studies on the Mode of Action of the Diapause Hormone in the Silkworm, BOMBYX MORI L

1965 ◽  
Vol 43 (2) ◽  
pp. 271-277
Author(s):  
KINSAKU HASEGAWA ◽  
OKITSUGU YAMASHITA
Keyword(s):  
Carbohydrate Metabolism ◽  
Bombyx Mori ◽  
Mode Of Action ◽  
Fat Body ◽  
Glycogen Synthesis ◽  
Target Organ ◽  
Suboesophageal Ganglion ◽  
Bombyx Mori L ◽  
Diapause Hormone ◽  
Silkworm Bombyx Mori

1. Glycogen synthesis in the ovary of Bombyx mori is accelerated by the diapause hormone. 2. Such glycogen is derived, by way of the trehalose of the haemolymph, from carbohydrate in the fat body. 3. Extirpation of the suboesophageal ganglion has the converse effect: a fall in glycogen in the ovary and an increase in blood trehalose and fat-body glycogen. 4. Mobilization of fat-body glycogen is dependent on the presence of the ovaries, and of the suboesophageal ganglion. 5. The same results can be obtained in male pupae after the implantation of ovaries. 6. These observations on carbohydrate metabolism confirm the belief that the ‘target organ’ of the diapause hormone is the ovary itself. The changes in other tissues are due to feedback.

BmNPV alters NADP-dependent malate dehydrogenase activity and associated macromolecules and retards growth and development of the mulberry silkworm, Bombyx mori L., during the final instar

2002 ◽  
Vol 80 (8) ◽  
pp. 1451-1459 ◽  
Author(s):  
Natraj Krishnan ◽  
Anathbandhu Chaudhuri
Keyword(s):  
Bombyx Mori ◽  
Malate Dehydrogenase ◽  
Growth And Development ◽  
Fat Body ◽  
Post Inoculation ◽  
Body Tissues ◽  
Baculovirus Infection ◽  
Bombyx Mori L ◽  
Mulberry Silkworm ◽  
Silkworm Bombyx Mori

Changes in tissue-specific NADP-dependent malate dehydrogenase (MDH) activity and protein and cholesterol contents and retardation of growth and development in the mulberry silkworm, Bombyx mori L., induced by infection with a baculovirus, the B. mori nucleopolyhedrovirus (BmNPV), were investigated. The study revealed that the relative growth rate and development of the fifth-instar larva was significantly inhibited during the progression of nuclear polyhedrosis disease at various times post inoculation (p.i.). Percent pupation and reproductive output were also adversely affected. NADP-dependent MDH activity in the hemolymph peaked sharply at 6 h p.i. and then gradually decreased, reaching a minimum at 264 h p.i., with exceptions at 30 and 72 h p.i. These levels of MDH activity were different from those in non-infected controls. In fat-body tissues, NADP-dependent MDH activity was significantly higher in infected insects than in non-infected controls of the same age. These results indicate that baculovirus infection causes significant changes in intermediary metabolic pathways, causing a significant fall and rise in protein and cholesterol contents in tissues during development of fifth-instar larvae.

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