Intracellular symbiosis in cockroaches. III. Re-infection of aposymbiotic cockroaches with symbiotes
✍ Scribed by Brooks, Marion A. ;Richards, A. Glenn
- Publisher
- John Wiley and Sons
- Year
- 1956
- Tongue
- English
- Weight
- 985 KB
- Volume
- 132
- Category
- Article
- ISSN
- 0022-104X
No coin nor oath required. For personal study only.
✦ Synopsis
Because of the intimacy inherent in their dependency, symbiotic organisms resist the separation that is iicccssary for a critical analysis of the relationship. Some of the ecological ancl behavioral complexities of symbiotic associations have been rcviewed by Davenport ( '55)' while a n extensive monograph by Buchner ( '53) deals with the field of endosymbiosis of animals with plant-like microorganisms. Agmong the insects, cockroaches have long been known to liarbor bacteria-like objects (bacteroids) thought to be symbiotes (Rlochmann, 1887). The bacteroids are containcd in special cells, the mycetocytes (figs. 2 ancl 3), of the visceral abdoniinal fat body of both males and fenialcs and are transmitted within the cytoplasm of tlie eggs to the ncxt generation. Thc method of transfer of bacteroids froin inycctocytrs to oocytcs is nnknown. The bactwoicls h a w never becn observed in an cstraccllular location csccpt for a brief period (lui-ing cnibi.pogciiesis. The exact nature of these intracellultn* hotlics is still a matter of speculation.
There are numerous reports in the literature of attempts to culture the bacteroids isr citro (Bode, '36 : Gicr, '47 ; Glascr, '20, '30; Gropmgiesscr, '25 ; Gublcr, '47 ; Hcrtig, ' d l ; Hoover', P:ilwr 110. 3381. Scicwtific Journal Scries, Miiinesots Agrieiiltiiral Expcriiiirut St:ition, St. P~lul. Tlic work drseribed in this paprr was supported bp a contra& hrtmrni tlic Office of tlir Siugroii Gc~icrnl, Drp:irttiieiit of the Artily, mil tlie University of Minnesota. The niaterial presented w i s inelnclrd in n tlirsis subniitted by M. A. Brooks to the University of Minnesota for the Ph.D. clcgrce.