Studies on the Nitrogenous Compounds in Urine of Mature Silkworm Larvae, Bombyx mori (Lepidoptera : Bombycidae)
4
Citation
14
Reference
10
Related Paper
Citation Trend
Keywords:
Bombycidae
The effects of UV-radiation on some commercially relevant traits of three instars viz. 1st, 2nd and 3rdof the two multivoltine strains, Nistari-M and Urboshi-1 of the silkworm, Bombyx mori L. have beeninvestigated. UV-rays reduced the weight of larvae, pupae and adults of both the strains and sexes of B. mori independently of the instar that has been treated. The cocoon weight, shell weight and shell ratios were also reduced due to UV-irradiation. Increased larval mortality was recorded at all the doses of UVrays.
Bombycidae
Voltinism
Cite
Citations (5)
Bombycidae
Nuclear Polyhedrosis Virus
Voltinism
Cite
Citations (28)
Bombycidae
Cite
Citations (1)
Sericulture generates different natural products with potential medical applications. Silk peptides, worms, or even pupae are commonly employed in traditional Asian medicine with a wide variety of purposes, and some scientific work has been focused on their antidiabetic properties. This work evaluates the postprandial antihyperglycemic activity of fibroin, sericin, and powder made from either larvae or pupae of silkworms, and Bombyx mori L. (Lepidoptera: Bombycidae), employing the silkworm itself as an animal model. The results indicate a reduction in the glucose levels in hemolymph after sucrose or glucose-induced hyperglycemia when these products are included in the diet of the worms.
Bombycidae
Sericulture
Hemolymph
Sericin
Fibroin
Cite
Citations (15)
Bombycidae
Voltinism
Cite
Citations (5)
Bombycidae
Esterase
Cite
Citations (11)
In insects, the activity of phenoloxidase increases near the site of injury where it not only helps in wound healing but also prevents infection. The present study discusses the regulation of phenoloxidase by age dependent mechanical injury in the silkworm. The experiment was conducted on 4th and 5th instar silkworms with single and multiple wounding. A drastic increase in the enzyme activity was observed in 4th instar caterpillars upon a single wounding. Conversely, less enzyme activity was observed in 5th instar caterpillars upon single wounding but this increased with multiple wounding. This reveals the age dependent control over phenoloxidase activity in silkworm that may be essential in the later instars to prevent any autoimmune effect caused by the enzyme. Controlling enzyme activity may be a significant evolutionary strategy adapted by the caterpillar to regulate the energy investment during 5th instar. The results of the present study confirm the probability of the presence of a novel mechanism which regulates the activity of phenoloxidase in caterpillars at different instars.
Bombycidae
Cite
Citations (2)
GlcNAcase is a glycosyl hydrolase located in the lysosomes of numerous organisms. Levels of the protein, β-N-acetylglucosaminidase 2 (GlcNAcase2), which is a member of the GlcNAcase family, are different in two strains of the silkworm Bombyx mori that have different resistance to Bombyx mori nucleopolyhedroviruses (BmNPVs). We identified six single-nucleotide differences in the GlcNAcase2 coding sequence between the 306 and NB strains. Five are silent changes, but one is a nonsynonymous mutation. Reverse transcription-polymerase chain reaction analysis showed that GlcNAcase2 mRNA levels in the NB strain were nearly 2.57 times higher compared with those in the 306 strain. In addition, GlcNAcase2 enzyme activity was much higher in the NB strain compared with that in the 306 strain. Together, these results indicate that GlcNAcase2 may be involved in variable BmNPV resistance in B. mori .
Bombycidae
Cite
Citations (2)
Bombycidae
Bombyx
Synapsis
Cite
Citations (19)