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Chemical inhibition ofChlorellasp. by rotifers
Xu, Ran1,2; Zhang, Litao1,3; Liu, Jianguo1,3
Corresponding AuthorLiu, Jianguo(
AbstractTo test the hypothesis that rotifers release one or more chemical microalgal growth inhibitors in addition to devouring the microalgal cells, the effects of different concentrations of filtered, bacteria-free, rotifer culture filtrate (RCF) on the growth and physiological parameters ofChlorellasp., and the response ofChlorellasp. at different starting cell densities to 10% RCF, were studied. The results show that RCF significantly decreasedChlorellacell densities during the incubation, suggesting that rotifers release some chemical(s) that inhibit microalgal cell growth.Chlorellacell densities decreased with increasing RCF concentration. Increasing the initial cell density ofChlorelladispersed the inhibitory chemical(s) present in 10% RCF over more cells, reducing their effect. The results confirm that the action of the chemical(s) released by rotifers on microalgal cell growth was dependent on both the RCF concentration and the exposure time. They also demonstrate that >= 10% RCF significantly inhibited photosynthesis and respiration, which would account for some of the decreasedChlorellacell growth in the presence of RCF. Calculations based on the data indicate that the rotifer-derived chemical(s) released hourly from each rotifer inhibits growth by 45.5 microalgal cells in addition to the rotifer predation, with a 48 h LC(50)value of 18.8% RCF. Based on these results, fresh medium instead of the old culture medium was contaminated by the rotifers.
KeywordChlorellasp microalgal growth photosynthesis respiration rotifer-derived growth inhibition
Indexed BySCI
Funding ProjectNational key research and development program-China[2016YFB0601004] ; National Natural Science Foundation of China[U1706209] ; Shandong Provincial Natural Science Foundation, China[ZR2019BC057]
WOS Research AreaPlant Sciences ; Marine & Freshwater Biology
WOS SubjectPlant Sciences ; Marine & Freshwater Biology
WOS IDWOS:000575394500001
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Document Type期刊论文
Corresponding AuthorLiu, Jianguo
Affiliation1.Chinese Acad Sci, Ctr Ocean Megasci, Inst Oceanol, Key Lab Expt Marine Biol, Qingdao 266071, Peoples R China
2.Univ Chinese Acad Sci, Beijing 10049, Peoples R China
3.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Biol & Biotechnol, Qingdao 266071, Peoples R China
First Author AffilicationCenter for Ocean Mega-Science, Chinese Academy of Sciences
Corresponding Author AffilicationCenter for Ocean Mega-Science, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Xu, Ran,Zhang, Litao,Liu, Jianguo. Chemical inhibition ofChlorellasp. by rotifers[J]. JOURNAL OF PHYCOLOGY,2020:9.
APA Xu, Ran,Zhang, Litao,&Liu, Jianguo.(2020).Chemical inhibition ofChlorellasp. by rotifers.JOURNAL OF PHYCOLOGY,9.
MLA Xu, Ran,et al."Chemical inhibition ofChlorellasp. by rotifers".JOURNAL OF PHYCOLOGY (2020):9.
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