scholarly journals Grazer-induced morphological defense in Scenedesmus obliquus is affected by competition against Microcystis aeruginosa

2015 ◽  
Vol 5 (1) ◽  
Author(s):  
Xuexia Zhu ◽  
Jun Wang ◽  
Yichun Lu ◽  
Qinwen Chen ◽  
Zhou Yang
Keyword(s):  
Microcystis Aeruginosa ◽  
Scenedesmus Obliquus ◽  
Morphological Defense

Allelopathic Inhibition by Scenedesmus obliquus of Photosynthesis and Growth of Microcystis aeruginosa

2008 ◽  
pp. 1339-1342 ◽  
Author(s):  
Xiao-Hui Jia ◽  
Ding-Ji Shi ◽  
Rui-Juan Kang ◽  
Hui-Min Li ◽  
Yu Liu ◽  
...  
Keyword(s):  
Microcystis Aeruginosa ◽  
Scenedesmus Obliquus

Survival of Microcystis aeruginosa and Scenedesmus obliquus under dark anaerobic conditions

2007 ◽  
Vol 58 (7) ◽  
pp. 634 ◽  
Author(s):  
X. L. Shi ◽  
F. X. Kong ◽  
Y. Yu ◽  
Z. Yang
Keyword(s):  
Chlorophyll A ◽  
Microcystis Aeruginosa ◽  
Metabolic Activity ◽  
Scenedesmus Obliquus ◽  
Anaerobic Conditions ◽  
Eutrophic Lakes ◽  
Cell Metabolic Activity ◽  
Chl A ◽  
Cell Concentrations ◽  
Fda Hydrolysis

The cyanobacterium Microcystis aeruginosa and the green alga Scenedesmus obliquus were incubated individually and together in the dark and under anaerobic conditions created by adding the reducing agent cysteine. Flow cytometry was used to monitor cell concentrations, fluorescence of chlorophyll-a (chl-a), and cell metabolic activity measured with an esterase-sensitive probe to detect fluorescein diacetate (FDA) hydrolysis of the two species. M. aeruginosa showed a slight increase in cell metabolic activity, no conspicuous death of cells, and absence of decay of chlorophyll-a fluorescence in individual and competition cases under dark anaerobic conditions. Cell metabolic activity and fluorescence of S. obliquus, on the contrary, decreased sharply, and cell concentrations fluctuated markedly with time in the unialgal cultures, but showed only a slight decline in the mixed cultures. M. aeruginosa appeared to be more tolerant to dark anaerobic conditions than S. obliquus, which may arise in eutrophic lakes beneath thick surface scums in the water column, or in the bottom sediments. Tolerance of these conditions may be important to the dominance of M. aeruginosa in eutrophic lakes.

Effect of phosphorus and temperature on chlorophyll a contents and cell sizes of Scenedesmus obliquus and Microcystis aeruginosa

Limnology ◽  
2010 ◽  
Vol 12 (2) ◽  
pp. 187-192 ◽  
Author(s):  
Meijun Chen ◽  
Jing Li ◽  
Xi Dai ◽  
Ying Sun ◽  
Feizhou Chen
Keyword(s):  
Chlorophyll A ◽  
Microcystis Aeruginosa ◽  
Scenedesmus Obliquus

scholarly journals The growth inhibition of Microcystis aeruginosa and Scenedesmus obliquus by periodic light fluctuation

2018 ◽  
Vol 30 (5) ◽  
pp. 1309-1318
Author(s):  
SUN Xin ◽  
◽  
HE Feifei ◽  
LI Pengfei ◽  
TANG Jiagang
Keyword(s):  
Growth Inhibition ◽  
Microcystis Aeruginosa ◽  
Scenedesmus Obliquus ◽  
Light Fluctuation

scholarly journals Effects of toxic Microcystis aeruginosa on the expression of Hox genes in Daphnia similoides sinensis

2021 ◽  
Author(s):  
Xiaoxue Xu ◽  
Daogui Deng ◽  
Ya-nan Zhang ◽  
Jianxun Wu ◽  
Shuixiu Peng ◽  
...  
Keyword(s):  
Microcystis Aeruginosa ◽  
Growth And Development ◽  
Hox Genes ◽  
Scenedesmus Obliquus ◽  
Survival Rates ◽  
Environmental Issues ◽  
Cyanobacterial Blooms ◽  
Gene Expressions ◽  
Hox Gene ◽  
Daphnia Similoides Sinensis

Lake eutrophication and cyanobacterial blooms have become worldwide environmental issues. Under cyanobacterial blooms (especially Microcystis), Daphnia spp. can transfer beneficial information to their offspring in order to improve adaptability. Hox genes are important regulatory factors of transcription in metazoans, and are involved in the growth and development of organisms. In this study, the effects of Microcystis aeruginosa on Hox gene expression in the mothers and offspring of Daphnia similoides sinensis were investigated using a mixed diet of M. aeruginosa and Scenedesmus obliquus, in two clones. There were significant differences in the survival rates of D. similoides sinensis under different food treatments. Our results suggest that the offspring produced by D. similoides sinensis mother pre-exposed to toxic M. aeruginosa had stronger adaptability to M. aeruginosa than those produced by previously unexposed mother. Additionally, Hox gene expressions of D. similoides sinensis had obvious differences between clones under stress of toxic M. aeruginosa.

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