Physiological Responses of Mesodinium major to Irradiance, Prey Concentration and Prey Starvation
Research output: Contribution to journal › Journal article › Research › peer-review
Standard
Physiological Responses of Mesodinium major to Irradiance, Prey Concentration and Prey Starvation. / Drumm, Kirstine; Norlin, Andreas; Kim, Miran; Altenburger, Andreas; Hansen, Per Juel.
In: Journal of Eukaryotic Microbiology, Vol. 68, No. 4, e12854, 2021.Research output: Contribution to journal › Journal article › Research › peer-review
Harvard
APA
Vancouver
Author
Bibtex
}
RIS
TY - JOUR
T1 - Physiological Responses of Mesodinium major to Irradiance, Prey Concentration and Prey Starvation
AU - Drumm, Kirstine
AU - Norlin, Andreas
AU - Kim, Miran
AU - Altenburger, Andreas
AU - Hansen, Per Juel
PY - 2021
Y1 - 2021
N2 - Ciliates within the Mesodinium rubrum/Mesodinium major species complex harbor chloroplasts and other cell organelles from specific cryptophyte species. Mesodinium major was recently described, and new studies indicate that blooms of M. major are just as common as blooms of M. rubrum. Despite this, the physiology of M. major has never been studied and compared to M. rubrum. In this study, growth, food uptake, chlorophyll a and photosynthesis were measured at six different irradiances, when fed the cryptophyte, Teleaulax amphioxeia. The results show that the light compensation point for growth of M. major was significantly higher than for M. rubrum. Inorganic carbon uptake via photosynthesis contributed by far most of total carbon uptake at most irradiances, similar to M. rubrum. Mesodinium major cells contain ~four times as many chloroplast as M. rubrum leading to up to ~four times higher rates of photosynthesis. The responses of M. major to prey starvation and refeeding were also studied. Mesodinium major was well adapted to prey starvation, and 51 d without prey did not lead to mortality. Mesodinium major quickly recovered from prey starvation when refed, due to high ingestion rates of > 150 prey/predator/d.
AB - Ciliates within the Mesodinium rubrum/Mesodinium major species complex harbor chloroplasts and other cell organelles from specific cryptophyte species. Mesodinium major was recently described, and new studies indicate that blooms of M. major are just as common as blooms of M. rubrum. Despite this, the physiology of M. major has never been studied and compared to M. rubrum. In this study, growth, food uptake, chlorophyll a and photosynthesis were measured at six different irradiances, when fed the cryptophyte, Teleaulax amphioxeia. The results show that the light compensation point for growth of M. major was significantly higher than for M. rubrum. Inorganic carbon uptake via photosynthesis contributed by far most of total carbon uptake at most irradiances, similar to M. rubrum. Mesodinium major cells contain ~four times as many chloroplast as M. rubrum leading to up to ~four times higher rates of photosynthesis. The responses of M. major to prey starvation and refeeding were also studied. Mesodinium major was well adapted to prey starvation, and 51 d without prey did not lead to mortality. Mesodinium major quickly recovered from prey starvation when refed, due to high ingestion rates of > 150 prey/predator/d.
U2 - 10.1111/jeu.12854
DO - 10.1111/jeu.12854
M3 - Journal article
C2 - 33866638
VL - 68
JO - Journal of Eukaryotic Microbiology
JF - Journal of Eukaryotic Microbiology
SN - 1066-5234
IS - 4
M1 - e12854
ER -
ID: 260038062