Response of the bacterial symbiont Holospora caryophila to different growth conditions of its host

Publikation: Beitrag in FachzeitschriftForschungsartikelBeigetragenBegutachtung

Beitragende

Abstract

Previous studies on bacterial symbionts of ciliates have shown that some symbionts can be maintained relatively well under standard laboratory conditions whereas others are frequently lost, especially when the host is cultivated at a high division rate. In this study, the variation in infection level by the endosymbiont Holospora caryophila within its host population Paramecium octaurelia was investigated in response to three alimentary treatments and a subsequent starvation phase. The response of the ciliates was determined as a nearly exponential growth rate with different slopes in each treatment, proportional to the amount of food received. The initial infection level was higher than 90%. After 24 days of exponential host's growth, the prevalence remained stable at approximately 90% in all treatments, even after a subsequent starvation phase of 20 days. However, at intermediate time-points in both the feeding and the starvation phase, fluctuations in the presence of the intracellular bacteria were observed. These results show that H. caryophila is able to maintain its infection under the tested range of host growth conditions, also due to the possibility of an effective re-infection in case of partial loss. © 2014 Elsevier GmbH.

Details

OriginalspracheEnglisch
Seiten (von - bis)98-108
Seitenumfang11
FachzeitschriftEuropean journal of protistology
Jahrgang51
Ausgabenummer1
PublikationsstatusVeröffentlicht - 2015
Peer-Review-StatusJa

Externe IDs

Scopus 84940166805

Schlagworte

Schlagwörter

  • Paramecium, Ciliates, Endosymbiosis, Macronuclear, Parasites

Bibliotheksschlagworte