期刊
BIOLOGICAL TRACE ELEMENT RESEARCH
卷 164, 期 1, 页码 106-113出版社
HUMANA PRESS INC
DOI: 10.1007/s12011-014-0195-1
关键词
Bombyx mori; Titanium dioxide nanoparticles; Reproductive capacity; Fecundity; Growth and development
资金
- National High Technology Research and Development Program of China (863 Program) [2013AA102507]
- State Key Laboratory of Silkworm Genome Biology
- Transformation Project of Agriculture Scientific and Technological Achievements [2013GB2C100180]
- National Cocoons Silk Development Funds
- Priority Academic Program Development of Jiangsu Higher Education Institutions
- Doctoral Fund of Ministry of Education of the People's Republic of China [20113201110008]
- China Agriculture Research System [CARS-22-ZJ0305]
- Science & Technology support Program of Suzhou [ZXS2012005, SYN201406]
Silkworm (Bombyx mori) is an important economic insect and the model insect of Lepidoptera. Because of its high fecundity and short reproduction cycle, it has been widely used in reproduction and development research. The high concentrations of titanium dioxide nanoparticles (TiO2 NPs) show reproductive toxicity, while low concentrations of TiO2 NPs have been used as feed additive and demonstrated significant biological activities. However, whether the low concentrations of TiO2 NPs affect the reproduction of B. mori has not been reported. In this study, the growth and development of gonad of B. mori fed with a low concentration of TiO2 NPs (5 mg/L) were investigated by assessing egg production and expression of reproduction-related genes. The results showed that the low concentration of TiO2 NPs resulted in faster development of the ovaries and testes and more gamete differentiation and formation, with an average increase of 51 eggs per insect and 0.34x10(-4) g per egg after the feeding. The expressions of several reproduction-related genes were upregulated, such as the yolk-development-related genes Ovo-781 and vitellogenin (Vg) were increased by 5.33- and 6.77-folds, respectively. This study shows that TiO2 NPs feeding at low concentration can enhance the reproduction of B. mori, and these results are useful in developing new methods to improve fecundity in B. mori and providing new clues for its broad biological applications.
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