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International Journal of Insects Review Article

Defensive Mechanisms and Key Strategies with Its Specified Role in Mulberry Silkworm (Bombyx mori L.)

  1. Karthick Mani Bharathi B Department of Sericulture, Forest College and Research Institute, Tamil Nadu Agricultural University, Mettupalayam
  2. Susikaran S Directorate of Open and Distance Learning, Tamil Nadu Agricultural University. Coimbatore
  3. Allwin Loveson Professor, Department of Agricultural Entomology, VOCACRI, Tamil Nadu Agricultural University, Killikulam

Abstract

Silkworms (Bombyx mori L.) possess a variety of defense mechanisms that play a vital role in protecting them against microbial infections and environmental stressors. These defense systems are primarily innate, relying on cellular and humoral responses. Cellular defenses include hemocytes which are responsible for processes like phagocytosis, encapsulation, and nodule formation. Humoral responses involve the production of antimicrobial peptides (AMP’s), such as cecropins, moricins, and lysozymes, which target invading pathogens. Heat shock proteins also contribute by stabilizing protein structures during stress conditions like elevated temperatures. Furthermore, silkworms produce reactive oxygen species as part of their immune response thereby helping to neutralize harmful invaders. Recent studies have revealed molecular insights into how these defense mechanisms are activated and regulated. Understanding these immune strategies not only provides insights into insect immunity but also opens potential avenues for enhancing disease resistance in sericulture thereby ensuring better productivity in the silk industry.

Keywords

References (19)

  1. Bharathi B. KM, S. S, S. V, V. V, S. RK, E. AK, et al. A Comparative Biochemical Study of Mulberry (Morus spp.) Mini Clones Over Conventional Stem Cuttings. International Journal of Plant & Soil Science. 2024;36(5):975-983. doi:10.9734/ijpss/2024/v36i54593
  2. Bharathi KM, Susikaran S, Parthiban KT, Vasanth V, Vijay S. Influence of different transplanting days on yield attributes of mini clones under field conditions for Morus indica (V1). Madras Agric J. 2024;111(3):1–7.
  3. Kausar S, Abbas MN, Zhao Y, Cui H. Immune strategies of silkworm, Bombyx mori against microbial infections. Invertebr Surviv J. 2019;130–140.
  4. Yang Y, Tang H, Zhang Y, Zhu F, Lü P, Yao Q, et al. Research progress on the immune mechanism of the silkworm Bombyx mori. Physiological Entomology. 2018;43(3):159-168. doi:10.1111/phen.12241
  5. Gadwala M, Vootla S, Tewary P, Babulal. Immune mechanism in silkworm Bombyx mori L. Methods in Microbiology. 2021:115-141. doi:10.1016/bs.mim.2021.04.006
  6. Jing W, Xiangyang Z, Xiujin Z. A review of innate immunity of silkworm, Bombyx mori. African Journal of Agricultural Research. 2013;8(20):2319-2325. doi:10.5897/ajarx11.079
  7. Wang Q, Sun Z, Ma S, Liu X, Xia H, Chen K. Molecular mechanism and potential application of bacterial infection in the silkworm, Bombyx mori. Developmental & Comparative Immunology. 2022;131:104381. doi:10.1016/j.dci.2022.104381
  8. Sahu S, Dandapat J, Mohanty N. Foliar supplementation of zinc modulates growth and antioxidant defense system of tasar silkworm Antheraea mylitta. J Entomol Zool Stud. 2015;3(2):25–35.
  9. Department of Sericulture, Forest College and Research Institute, Tamil Nadu Agricultural University, Mettupalayam., Bharathi B KMBB, S S, Directorate of Open and Distance Learning, Tamil Nadu Agricultural University. Coimbatore, KT P, Forest College and Research Institute, Tamil Nadu Agricultural University, Mettupalayam, et al. Effect of auxins on biochemical composition of apical cuttings of Mulberry (Morus indica l.) Using mini clonal technology. International Journal of Zoology and Applied Biosciences. 2024;9(3):40-45. doi:10.55126/ijzab.2024.v09.i03.007
  10. Hungund SP, Pradeep ANR, Makwana P, Sagar C, Mishra RK. Cellular defence and innate immunity in the larval ovarian disc and differentiated ovariole of the silkwormBombyx moriinduced by microsporidian infection. Invertebrate Reproduction & Development. 2019;64(1):10-21. doi:10.1080/07924259.2019.1669727
  11. Sahoo A, Sahu S, Dandapat J, Samanta L. Pro-oxidative challenges and antioxidant protection during larval development of non-mulberry silkworm,Antheraea mylitta(Lepidoptera: Saturniidae). Italian Journal of Zoology. 2015;83(1):3-14. doi:10.1080/11250003.2015.1103319
  12. VishnuPriya S, Somasundaram P. Role of bacterial endotoxin for identification of immune defence and genetic hardiness on the enzyme control in silkworm Bombyx mori (L.). The Sci tech J. 2014;2347–7318.
  13. Makwana P, Rahul K, Ito K, Subhadra B. Diversity of antimicrobial peptides in silkworm. Life. 2023;13(5):1161. doi: 3390/life13051161.
  14. Priyadharshini P, Swathiga G, Maria Joncy A, Thangamalar A. Probiotics and its role in silkworm growth and development. Just Agric. 2021;2(2):1–6.
  15. Li Z, Ma Y, Liu X, Li Y, Dai F. Antimicrobial peptides in silkworm. Anim Biol. 2019;69(4):391–410. doi: 1163/15707563-20191065.
  16. Hu Z, Zhu F, Chen K. The Mechanisms of Silkworm Resistance to the Baculovirus and Antiviral Breeding. Annual Review of Entomology. 2023;68(1):381-399. doi:10.1146/annurev-ento-120220-112317
  17. Zhou Y, Zhou S, Duan H, Wang J, Yan W. Silkworm Pupae: A Functional Food with Health Benefits for Humans. Foods. 2022;11(11):1594. doi:10.3390/foods11111594
  18. Romoli O, Saviane A, Bozzato A, D’Antona P, Tettamanti G, Squartini A, et al. Differential sensitivity to infections and antimicrobial peptide-mediated immune response in four silkworm strains with different geographical origin. Scientific Reports. 2017;7(1). doi:10.1038/s41598-017-01162-z
  19. Tanaka H, Yamakawa M. Regulation of the innate immune responses in the silkworm, Bombyx mori Invertebr Surviv J. 2011;8(1):59–69.