| Title: | Pore-ridge nanostructures on the surface of trichoid sensilla of the male silkmoth Bombyx mori: Aerodynamic trapping and transporting of the pheromone molecules |
| Author(s): | Su J; Zhao B; Zhang A; Bu X; Chen J; Yan Z; Wang S; |
| Address: | "College of Chemical Engineering, Nanjing Forestry University, Nanjing, 210037, PR China; College of Science, Nanjing Forestry University, Nanjing, 210037, PR China. College of Forestry, Nanjing Forestry University, Nanjing, 210037, PR China. Invasive Insect Biocontrol and Behavior Laboratory, Agricultural Research Service, United States Department of Agriculture, Beltsville, MD, 20705-2350, USA. College of Science, Nanjing Forestry University, Nanjing, 210037, PR China. College of Electronic and Optical Engineering and the College of Microelectronics, Nanjing University of Posts and Telecommunications, Nanjing, 210023, PR China. College of Chemical Engineering, Nanjing Forestry University, Nanjing, 210037, PR China. Electronic address: wangshifa65@163.com" |
| DOI: | 10.1016/j.asd.2019.06.004 |
| ISSN/ISBN: | 1873-5495 (Electronic) 1467-8039 (Linking) |
| Abstract: | "This paper tries to reveal the mechanism of the high-efficient adsorption of the sex pheromone by the trichoid sensilla of the male silk moth Bombyx mori. Scanning electron microscopy (SEM) and atomic force microscopy (AFM) were used to acquire the topographies and nanostructures of the surfaces of the trichoid sensilla. SEM and AFM images present mostly regular pore-ridge nanostructures on the sensilla, and all the pores are located at or near the feet of the ridges. AFM phase-shift images demonstrate that the variation of phase-shift, which appears along the ridge cannot simply be attributed to heterogeneity in surface lipid properties, for the phase-shift was present in the same region with the sudden difference in height. Simulations of computational fluid dynamics were applied to investigate the effects on the airflow velocity field and streamlines by the pore-ridge nanostructures and the antenna vibration. Simulation results indicate that the airflow vortexes that form on the sensillum surface are generated by the combined effect of ambient airflow and pore-ridge structure as well as spontaneous vibration of the antenna. We suggest that the vortex intercepts and traps the pheromone molecules passing nearby, and transports them through its periodical movement to the pore. We speculate that the vortex is the aerodynamic factor benefitting the highly efficient adsorption of pheromone molecules" |
| Keywords: | "Animals Bombyx/metabolism/*ultrastructure Male Microscopy, Electron, Scanning Sensilla/metabolism/*ultrastructure Sex Attractants/*metabolism Atomic force microscope Computational fluid dynamics Insect Pheromone Sensillum;" |
| Notes: | "MedlineSu, Jun Zhao, Boguang Zhang, Aijun Bu, Xiaoli Chen, Jing Yan, Zhendong Wang, Shifa eng England 2019/06/23 Arthropod Struct Dev. 2019 Sep; 52:100875. doi: 10.1016/j.asd.2019.06.004. Epub 2019 Oct 1" |
