Evaluation of the acute toxic response induced by triazophos to the non-target green algae Chlorella pyrenoidosa

1. By means of 14C tracer experiments and isotope competition experiments the roles of d-tyrosine, p-hydroxyphenylpyruvic acid, p-hydroxyphenylacetic acid, phenylacetic acid, homogentisic acid and homoarbutin (2-methylquinol 4-β-d-glucoside) in the biosynthesis of plastoquinones, tocopherols and α-tocopherolquinone by maize shoots was investigated. It was established that d-tyrosine, p-hydroxyphenylpyruvic acid and homogentisic acid can all be utilized for this purpose, whereas p-hydroxyphenylacetic acid, phenylacetic acid and homoarbutin cannot. Studies on the mode of incorporation of d-tyrosine, p-hydroxyphenylpyruvic acid and homogentisic acid showed that their nuclear carbon atoms and the side-chain carbon atom adjacent to the nucleus give rise (as a C6-C1 unit) to the p-benzoquinone rings and nuclear methyl groups (one in each case) of plastoquinone-9 and α-tocopherolquinone and the aromatic nuclei and nuclear methyl groups (one in each case) of γ-tocopherol and α-tocopherol. 2. By using [14C]-homogentisic acid it has been shown that homogentisic acid is also a precursor of plastoquinone, tocopherols and α-tocopherolquinone in the higher plants Lactuca sativa and Rumex sanguineus, the green algae Chlorella pyrenoidosa and Euglena gracilis and the blue–green alga Anacystis nidulans.

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Genetic diversity analysis with ISSR PCR on green algae Chlorella vulgaris and Chlorella pyrenoidosa

Chinese Journal of Oceanology and Limnology ◽

10.1007/s00343-008-0380-1 ◽

2008 ◽

Vol 26 (4) ◽

pp. 380-384 ◽

Cited By ~ 9

Author(s):

Songdong Shen

Keyword(s):

Genetic Diversity ◽

Green Algae ◽

Chlorella Vulgaris ◽

Chlorella Pyrenoidosa ◽

Diversity Analysis ◽

Genetic Diversity Analysis ◽

Issr Pcr

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Increase in the biomass of some green algae species in nitrate and ammonium mediums depending on auto-, mixo- or heterotrophic conditions

Acta Societatis Botanicorum Poloniae ◽

10.5586/asbp.1985.006 ◽

2014 ◽

Vol 54 (1) ◽

pp. 65-76 ◽

Cited By ~ 1

Author(s):

Stefan Gumiński ◽

Krystyna Jurajda ◽

Ewa Tatkowska

Keyword(s):

Protein Content ◽

Green Algae ◽

Chlorella Pyrenoidosa ◽

Dry Mass ◽

Scenedesmus Quadricauda ◽

Individual Species ◽

Content Increase ◽

Nitrate Medium ◽

The Individual ◽

Mixotrophic Conditions

The increase in total dry mass and protein in cultures of <em>Chlorella pyrenoidosa, Scenedesmus quadricauda</em> and <em>Ankistrodesmus acicularis</em> was studied. Under autotrophic conditions, increases in dry mass were, as a rule, larger in the nitrate medium than in the ammonium one, under mixotrophic conditions the situation was reversed and in the case of heterotrophy, the individual species reacted differently. The dependence ot the protein content increase on the nitrate or ammonium form of the medium was not clear. Changes in time of the pH and rH of the mediums were followed and the interdependence of these changes with the production of biomass is discussed.

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Influence of Speciation of Thorium on Toxic Effects to Green Algae Chlorella pyrenoidosa

International Journal of Molecular Sciences ◽

10.3390/ijms18040795 ◽

2017 ◽

Vol 18 (4) ◽

pp. 795 ◽

Cited By ~ 11

Author(s):

Can Peng ◽

Yuhui Ma ◽

Yayun Ding ◽

Xiao He ◽

Peng Zhang ◽

...

Keyword(s):

Green Algae ◽

Chlorella Pyrenoidosa ◽

Toxic Effects

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Evaluation of the toxic response induced by azoxystrobin in the non-target green alga Chlorella pyrenoidosa

Environmental Pollution ◽

10.1016/j.envpol.2017.11.081 ◽

2018 ◽

Vol 234 ◽

pp. 379-388 ◽

Cited By ~ 48

Author(s):

Tao Lu ◽

Youchao Zhu ◽

Jiahui Xu ◽

Mingjing Ke ◽

Meng Zhang ◽

...

Keyword(s):

Green Alga ◽

Chlorella Pyrenoidosa ◽

Toxic Response ◽

Green Alga Chlorella

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Ultrasonic selectivity on depressing photosynthesis of cyanobacteria and green algae probed by chlorophyll-a fluorescence transient

Water Science & Technology ◽

10.2166/wst.2017.376 ◽

2017 ◽

Vol 76 (8) ◽

pp. 2085-2094 ◽

Cited By ~ 6

Author(s):

Zhipeng Duan ◽

Xiao Tan ◽

Niegui Li

Keyword(s):

Chlorophyll A ◽

Green Algae ◽

Electron Acceptor ◽

Cell Concentration ◽

Electron Flow ◽

Chlorella Pyrenoidosa ◽

Cyanobacterial Blooms ◽

Cell Structures ◽

Toxic Cyanobacteria ◽

New Strategy

Ultrasound can inhibit cyanobacterial growth through rupturing cells, but this pathway frequently has the risk to release intercellular toxin (e.g., microcystin). Depressing photosynthesis without cell disruption may provide a new strategy to control cyanobacterial blooms using ultrasound, especially Microcystis blooms. In this work, Microcystis aeruginosa (toxic cyanobacteria) and Chlorella pyrenoidosa (typical green algae) were chosen as model microalgae to verify this hypothesis. Results showed that ultrasound has the ability to inhibit cyanobacterial photosynthesis significantly and selectively. Specifically, sonication damaged QA, a tightly bound one-electron acceptor, and blocked electron flow at QB, a two-electron acceptor, in the photosystem II (PSII) of M. aeruginosa when it was exposed for 60 s (35 kHz, 0.043 W/cm3). Moreover, 44.8% of the reaction centers (RCs) in the PSII of M. aeruginosa were transferred into inactive ones (RCsis), and the cell concentration decreased by 32.5% after sonication for 300 s. By contrast, only 7.9% of RCsi occurred in C. pyrenoidosa, and cell concentration and chlorophyll-a content reduced by 18.7% and 9.3%, respectively. Differences in both species (i.e., cell structures) might be responsible for the varying levels to sonication. This research suggests that cyanobacteria, especially Microcystis, could be controlled by ultrasound via damaging their PSIIs.

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