|HELM, BRYAN - North Dakota State University|
|PAYNE, SCOTT - North Dakota State University|
|Rinehart, Joseph - Joe|
|BOWSHER, JULIA - North Dakota State University|
|GREENLEE, KENDRA - North Dakota State University|
Submitted to: Arthropod Structure and Development
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 5/9/2018
Publication Date: 6/28/2018
Citation: Helm, B.R., Payne, S., Rinehart, J.P., Yocum, G.D., Bowsher, J.H., Greenlee, K.J. 2018. Micro-computed tomography of pupal metamorphosis in the solitary bee Megachile rotundata. Arthropod Structure and Development. 47(5):521-528. https://doi.org/10.1016/j.asd.2018.05.001.
Interpretive Summary: Although the external changes that an insect goes through during development through its life stages are well known, much less is known about how structures inside the insect are affected. Using an advanced x-ray based system called micro-computed tomography, we observed the development of the brain, muscles, gut, and other internal structures and organs during the later stages of development in the alfalfa leafcutting bee. We observed that different organs have different developmental patterns and developmental rates. This may significantly affect how this important alternative pollinator is managed.
Technical Abstract: Insect metamorphosis involves a complex change in form and function, but most of these changes are internal and treated as a black box. In this study, we examined development of the solitary bee, Megachile rotundata, using micro-computed tomography (µCT) and digital volume analysis. We describe developmental progression of brain, tracheae, flight muscles, gut, and unidentified inclusions during prepupal, pupal, and adult M. rotundata. We observed that individual organ systems have distinct patterns of developmental progression—varying in their timing and duration. This has important implications for its management as a commercial and natural pollinator.