Roberto Marotta, Andrea Uggetti, and Claudia Ricci contributed equally to this study.
Surviving starvation: Changes accompanying starvation tolerance in a bdelloid rotifer
Article first published online: 25 AUG 2011
Copyright © 2011 Wiley Periodicals, Inc.
Journal of Morphology
Volume 273, Issue 1, pages 1–7, January 2012
How to Cite
Marotta, R., Uggetti, A., Ricci, C., Leasi, F. and Melone, G. (2012), Surviving starvation: Changes accompanying starvation tolerance in a bdelloid rotifer. J. Morphol., 273: 1–7. doi: 10.1002/jmor.11000
- Issue published online: 7 DEC 2011
- Article first published online: 25 AUG 2011
- Manuscript Accepted: 19 JUN 2011
- Manuscript Revised: 4 MAY 2011
- Manuscript Received: 18 DEC 2010
- extreme adaptation;
- electron microscopy;
Bdelloid rotifers survive desiccation and starvation by halting activity and entering a kind of dormancy. To understand the mechanisms of survival in the absence of food source, we studied the anatomical and ultrastructural changes occurring in a bdelloid species, Macrotrachela quadricornifera Milne 1886, after starvation for different periods. The starved rotifers present a progressive reduction of body size accompanied with a consistent reduction of the volume of the stomach syncytium, where lipid inclusions and digestive vacuoles tend to fade with prolonged starvation. Similar reduction occurs in the vitellarium gland, in which yolk granules progressively decrease in number and size. The changes observed in the syncytia of the stomach and the vitellarium suggest that during starvation M. quadricornifera uses resources diverted from the stomach syncytium first and from the vitellarium syncytium later, resources that are normally allocated to reproduction. The fine structure of starved bdelloids is compared with that of anhydrobiotic bdelloids, revealing that survival during either forms of dormancy is sustained by different physiological mechanisms. J. Morphol., 2011. © 2011 Wiley Periodicals, Inc.