Mannosylerythritol Lipids Mediated Biosynthesis of Silver Nanoparticles: An Eco-friendly and Operative Approach Against
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ORIGINAL PAPER
Mannosylerythritol Lipids Mediated Biosynthesis of Silver Nanoparticles: An Eco-friendly and Operative Approach Against Chikungunya Vector Aedes albopictus Hassan Ga’al1,2 • Guiying Yang1 • Hatem Fouad1,3 • Meixia Guo1 • Jianchu Mo1 Received: 6 November 2019 Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract Recently the bioactive products of microbes and their nanoformulation particles have been remarkably studied in insecticides. In the present study, the Mannosylerythritol lipids (MELs) biosurfactant produced from Ustilago maydis has been employed in the rapid synthesis of silver nanoparticles (AgNPs). UV–Vis spectrum was initially confirmed the biofabricated AgNPs and further characterized by scanning electron microscopy, transmission electron microscopy, energydispersive X-ray, X-ray diffraction, and Fourier transform infrared. The mosquitocidal potency of MELs and AgNPs were assessed against larvae and pupae of Aedes albopictus. The AgNPs exhibited maximum toxicity against Larvae and pupae of Ae. albopictus with LC50 values ranging from 1.03 lg/ml (I) to 1.19 lg/ml (pupae) compared to the MELs toxicity which showed LC50 values ranging from 31 lg/ml (I) to 59 lg/ml (pupae). Further investigations of oxidative stress effects exerted by the tested materials against fourth instar larvae of Ae. albopictus showed an alteration in the levels of total protein, superoxide dismutase, peroxidase, and catalase enzyme activity. Interestingly, the TEM images of the midgut cells of treated larvae explored AgNPs accumulation in the rough endoplasmic reticulum and other cell organelles. Overall, this study suggests that AgNPs could be employed as an efficient tool in mosquito vector control strategies. Keywords Aedes albopictus Mannosylerythritol lipids Glycolipids biosurfactant MELsAg-NPs Cell organelles Mosquitoe
Introduction Mosquitoes (Diptera: Culicidae) vectors represent one of the major public health problems in the developing countries since they are efficient vectors for serious diseases to humans and animals, including Malaria, Dengue,
& Jianchu Mo [email protected] 1
Ministry of Agriculture Key Laboratory of Molecular Biology of Crop Pathogens and Insect Pests, Institute of Insect Sciences, College of Agriculture and Biotechnology, Zhejiang University, Yuhangtang Road 866, Hangzhou 310058, Zhejiang, People’s Republic of China
2
Department of Entomology, Faculty of Veterinary and Animal Husbandry, Somali National University, Mogadishu, Somalia
3
Department of Field Crop Pests, Plant Protection Research Institute, Agricultural Research Centre, Cairo, Egypt
Chikungunya, Japanese encephalitis, Lymphatic filariasis, Yellow fever and recently Zika virus [1–4]. The Asian tiger mosquito Aedes albopictus (SKUSE 1894) is one of the most invasive mosquitoes in the world, and the reasons for the successful competition with native mosquito species are the high invasion potential, the vector capacity and its ecological
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