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muga silkworm

Sakshi Gandotra, Archna Kumar, Kailash Naga, Pinky Moni Bhuyan, Dip K Gogoi, Kirti Sharma, Sabtharishi Subramanian
Muga silkworm, Antheraea assamensis is exclusively present in the North Eastern regions of India and rearing of this silkworm is a vocation unique to this region in the world. Through culture dependent techniques, generic identification using 16s rRNA probes, diversity analysis and qualitative screening for enzyme activities, our studies have identified a number of bacterial isolates viz., Bacillus spp, Serratia marcescens, Stenotrophomonas maltophilia, Pseudomonas stutzeri, Acinetobacter sp. and Alcaligens sp...
April 17, 2018: Insect Molecular Biology
Deepika Singh, Debajyoti Kabiraj, Pragya Sharma, Hasnahana Chetia, Ponnala Vimal Mosahari, Kartik Neog, Utpal Bora
Muga (Antheraea assamensis) is an economically important silkmoth endemic to the states of Assam and Meghalaya in India and is the producer of the strongest known commercial silk. However, there is a scarcity of genomic and proteomic data for understanding the organism at a molecular level. Our present study is on decoding the complete mitochondrial genome (mitogenome) of A. assamensis using next generation sequencing technology and comparing it with other available lepidopteran mitogenomes. Mitogenome of A...
2017: PloS One
Hasnahana Chetia, Debajyoti Kabiraj, Deepika Singh, Ponnala Vimal Mosahari, Suradip Das, Pragya Sharma, Kartik Neog, Swagata Sharma, P Jayaprakash, Utpal Bora
Antheraea assamensis (Lepidoptera: Saturniidae), is a semi-domesticated silkworm known to be endemic to Assam and the adjoining hilly areas of Northeast India. It is the only producer of a unique, commercially important variety of golden silk called "muga silk". Herein, we report the de novo transcriptome of A. assamensis reared on Machilus bombycina leaves for the first time. Short reads generated by high throughput sequencing of cDNA libraries from multiple tissues, viz. alimentary canal, silk gland and residual body of the 5(th) instar of muga silkworm were assembled into transcripts via a de novo assembly pipeline followed by functional annotation and classification...
May 5, 2017: Gene
Kavya Dashora, Somnath Roy, Akanksha Nagpal, Sudipta Mukhopadhyay Roy, Julie Flood, Anjali Km Prasad, Ravinder Khetarpal, Suzanne Neave, N Muraleedharan
Bacillus thuringiensis (Bt) is a soil bacterium that forms spores containing crystals comprising one or more Cry or Cyt proteins having potential and specific insecticidal activity. Different strains of Bt produce different types of toxins, affecting a narrow taxonomic group of insects. Therefore, it is used in non-chemical pest management, including inherent pest resistance through GM crops. The specificity of action of Bt toxins reduces the concern of adverse effects on non-target species, a concern which remains with chemical insecticides as well...
March 2017: Applied Microbiology and Biotechnology
Kishor Haloi, Moni Kankana Kalita, Ramesh Nath, Dipali Devi
Antheraea assamensis Helfer (muga silkworm) is an economically important endemic insect species of North Eastern Region of India. The silkworm is often susceptible to infection by pathogenic bacteria, leads to a disease commonly known as flacherie which causes 40% loss per annum to the silk industry. In this study, we have reported isolation, characterization and pathogenicity assessment of gut-associated bacteria of healthy and diseased muga silkworms. Thirty five bacterial isolates were screened from the gut of healthy and diseased silkworms by morphological observation and biochemical tests...
July 2016: Journal of Invertebrate Pathology
Bhavna Prishnee Baishya, Sunayan Bardoloi, Rupjyoti Bharali
Differential hemocyte count of circulating plasmatocytes (PL) and granulocytes (GR) of fifth-instar larvae of Muga Silkworm Antheraea assama Westwood (Lepidoptera: Saturniidae) reared at four different sericulture farms situated at different altitudes, viz, Khanapara State Sericulture Farm, Assam, altitude 55.5 m above sea level (ASL); Nongpoh (Central Silk Board farm), Meghalaya, altitude 464 m ASL; Tura (Central Silk Board farm), West Garo Hills, Meghalaya, 657 m ASL; and Kalimpong (Central Silk Board farm), West Bengal, altitude 1,247 m ASL, were calculated and compared to investigate the effect of altitude on the number of PL and GR per mm(3) of larval hemolymph...
2015: Journal of Insect Science
Rangam Rajkhowa, Jasjeet Kaur, Xungai Wang, Warren Batchelor
Silk fibres from silkworm cocoons have lower strength than spider silk and have received less attention as a source of high-performance fibres. In this work, we have used an innovative procedure to eliminate the flaws gradually of a single fibre specimen by retesting the unbroken portion of the fibre, after each fracture test. This was done multiple times so that the final test may provide the intrinsic fibre strength. During each retest, the fibre specimen began to yield once the failure load of the preceding test was exceeded...
June 6, 2015: Journal of the Royal Society, Interface
Anita Goldsmith, Sudip Dey, Jatin Kalita, Rina Choudhury
Scanning electron microscopy on the postembryonic development of the mouthpart sensory structures of the Muga silk moth, Antheraea assamensis revealed the presence of a variety of sensilla. The types, distribution pattern of the sensilla remained almost the same in the different larval stages except for the number and dimension in some cases. The findings of the study assumes significance because the silk moth, Antheraea assamensis is a species endemic to the North Eastern part of India and very few reports are available on it...
February 2014: Microscopy Research and Technique
Banani Kundu, S C Kundu
Conventional scaffold fabrication techniques result in narrow pore architectures causing a limited interconnectivity and use of porogens, which affects the bio- or cyto-compatibility. To ameliorate this, cryogels are immensely explored due to their macro-porous nature, ease in fabrication, using ice crystals as porogens, the shape property, easy reproducibility and cost-effective fabrication technique. Cryogels in the present study are prepared from nonmulberry Indian muga silk gland protein fibroin of Antheraea assamensis using two different fabrication temperatures (-20 and -80 °C)...
October 2013: Biomedical Materials
Saranga Dutta, Bijit Talukdar, Rupjyoti Bharali, Rangam Rajkhowa, Dipali Devi
This study discusses the possibilities of liquid silk (Silk gland silk) of Muga and Eri silk, the indigenous non mulberry silkworms of North Eastern region of India, as potential biomaterials. Silk protein fibroin of Bombyx mori, commonly known as mulberry silkworm, has been extensively studied as a versatile biomaterial. As properties of different silk-based biomaterials vary significantly, it is important to characterize the non mulberry silkworms also in this aspect. Fibroin was extracted from the posterior silk gland of full grown fifth instars larvae, and 2D film was fabricated using standard methods...
May 2013: Biopolymers
Kallare P Arunkumar, Anup Kumar Sahu, Atish Ranjan Mohanty, Arvind K Awasthi, Appukuttannair R Pradeep, S Raje Urs, Javaregowda Nagaraju
BACKGROUND: The Indian golden saturniid silkmoth (Antheraea assama), popularly known as muga silkmoth, is a semi-domesticated silk producing insect confined to a narrow habitat range of the northeastern region of India. Owing to the prevailing socio-political problems, the muga silkworm habitats in the northeastern region have not been accessible hampering the phylogeography studies of this rare silkmoth. Recently, we have been successful in our attempt to collect muga cocoon samples, although to a limited extent, from their natural habitats...
2012: PloS One
Kartik Neog, Balagopalan Unni, Giasuddin Ahmed
The feeding habits of Antheraea assamensis, Helfer (Lepidoptera: Saturniidae) larvae towards the leaves of its four different host plants, Persea bombycina King ex. Hook (Laurales: Lauraceae), Litsea polhantha Jussieu, L. salicifolia Roxburgh ex. Nees and L. citrata Blume, and the chemical basis of feeding preference were investigated. Nutritional superiority of young and medium leaves with respect to soluble protein, total phenol and phenylalanine ammonia lyase activity was observed in the leaves of P. bombycina compared to other host plants...
2011: Journal of Insect Science
Sudip Dey, Surendra Singh, Rahul Chakraborty, Rupa Nylla Kynta Hooroo, Sudipto Choudhury
Scanning electron microscopy revealed the presence of a number of cuticular sensillae on the head of different larval stages of the "Muga" silk moth, Antheraea assamensis. These include four types of sensilla trichodea, bead-like folded sensilla, two types of sensilla basiconica, and sensory pegs. The study seems to be the first attempt in describing the morphology and distribution pattern of the cephalic cuticular sensillae of different larval stages of the silk moth Antheraea assamensis, an indigenous species of Northeast India...
December 2009: Microscopy Research and Technique
Arundhati Choudhury, Arijit Guha, Archana Yadav, Jyotsna Kumari, Bala G Unni, Monoj K Roy
This study reports for the first time the induction of immunity in Antheraea assama Ww larvae against bacterial flacherie. In silkworms group of disease caused by bacteria are collectively called "flacherie." This refers to the flaccid condition of the larvae due to the infections of bacterial strains pathogenic to muga silkworm. Antibacterial activity against pathogenic Pseudomonas aeruginosa AC-3 causing flacherie, was induced by injection of heat-killed cells of the same strain. Experiments on larval survivability and viable cell count revealed peak immune response on third day...
March 2004: Experimental Parasitology
Arundhati Choudhury, Arijit Guha, Archana Yadav, Bala G Unni, Monoj K Roy
Of the different bacterial strains isolated from diseased muga silkworms, the strain named as AC-3 was found to be most pathogenic to the silkworm. Different antibiotics and plant extracts were tested for their effectiveness in inhibiting the growth of AC-3. Fresh Allium sativum (garlic extract) was most effective against the strain. The stability and MIC of the garlic extract has also been studied. We report for the first time the effectiveness of garlic extract in controlling the bacterium causing disease in the muga silkworm...
March 2002: Phytotherapy Research: PTR
B G Unni, A C Kakoty, D Khanikor, P R Bhattacharya, M G Pathak, K Pillai, R Pillai, A Choudhury, P C Saikia, A C Ghosh
The lipid and fatty acid composition of the leaves (tender, medium and mature) of muga host plants, Machilus bombycina, Litsaea monopetala (primary food plants) and L. cubeba and L. salicifolia (family: Lauraceae) (secondary food plants) was investigated by standard procedures, gas chromatography after saponification and esterification. The total lipid content of M. bombycina and L. monopetala leaves was recorded to be higher (16 and 18 g%), respectively, than that of L. cubeba (10 g%) and L. salicifolia (12 g%)...
May 1996: Journal of Lipid Mediators and Cell Signalling
A Barah, A K Sengupta
Female pupal weight and fecundity of mother moth of Antheraea assama Westwood fed with four different food plants have been studied. Litsaea polyantha fed females showed significantly higher pupal weight and higher rate of oviposition in comparison to three food plants Machilus bombycina, Litsaea salicifolia and Cinnamomum glaucescens. The number of eggs laid was correlated with the pupal weight. The correlation co-efficient (r = 0.9730) showed positive and significant correlation at 1% level. The pupal weight was found to be the best and genuine estimator of fecundity...
1991: Acta Physiologica Hungarica
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