Effect of copper stress on biochemical profiling in Dunaliella salina (teod.) And spirulina platensis (gomo.)

2017 ◽  
Vol 8 (1) ◽  
Author(s):  
AMRIT DAIYA ◽  
GAJENDRA PAL SINGH
Keyword(s):  
Spirulina Platensis ◽  
Dunaliella Salina ◽  
Copper Stress ◽  
Effect Of Copper

scholarly journals Betacyanin accumulation and guaiacol peroxidase activity in Beta vulgaris L. leaves following copper stress

2012 ◽  
Vol 81 (3) ◽  
pp. 193-201 ◽  
Author(s):  
Janet M. León Morales ◽  
Mario Rodríguez-Monroy ◽  
Gabriela Sepúlveda-Jiménez
Keyword(s):  
Lipid Peroxidation ◽  
Beta Vulgaris ◽  
Defense Responses ◽  
Hydroponic Culture ◽  
Copper Stress ◽  
Guaiacol Peroxidase ◽  
Copper Exposure ◽  
Plant Parts ◽  
Young Leaves ◽  
Effect Of Copper

The effect of copper stress on betacyanin accumulation and guaiacol peroxidase (GPOD) activity in leaves of different age was evaluated in red beet (<em>Beta vulgaris </em>L. var. Crosby Egyptian) plants. In hydroponic culture, plants were treated with 0.3 μM (control), 50 μM, 100 μM, and 250 μM of CuSO<sub>4</sub> for 6 days. Copper was taken up and accumulated in old roots but was not translocated to leaves. However in young leaves, the increase of lipid peroxidation and reduction of growth were evident from day 3 of copper exposure; whereas in old leaves, the lipid peroxidation and growth were the same from either copper-treated or control plants. In response to copper exposure, the betacyanin accumulation was evident in young leaves by day 3, and continued to increase until day 6. Betacyanin only were accumulated in old leaves until day 6, but the contents were from 4 to 5 times lower than those observed in young leaves at the same copper concentrations. GPOD activity increased 3.3- and 1.4-fold in young and old leaves from day 3 of copper treatment respectively, but only in the young leaves was sustained at the same level until day 6. Old roots shown betacyanin in the control plants, but the betacyanin level and growth were reduced with the copper exposure. In contrast, young roots emerged by copper effect also accumulated copper and showed the highest betacyanin content of all plant parts assayed. These results indicate that betacyanin accumulation and GPOD activity are defense responses to copper stress in actively growing organs.

Transcriptomic sequencing reveals the response of Dunaliella salina to copper stress via the increased photosynthesis and carbon metabolisms

2021 ◽  
Author(s):  
Na Ling ◽  
Weilu Li ◽  
Guiguo Xu ◽  
Zheng Qi ◽  
Chen-Feng Ji ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Green Algae ◽  
Environmental Conditions ◽  
Dunaliella Salina ◽  
Heavy Metal Stress ◽  
Metal Stress ◽  
Copper Stress ◽  
Low Concentration ◽  
Transcriptomic Sequencing

The green algae Dunaliella salina is known for its rich carotenoids. It is also resistant to various environmental conditions, particularly to heavy metal stress. The low concentration of copper can...

Effect of Copper on the interaction between the Predator Didinium nasutum and its Prey Paramecium caudatum

1990 ◽  
Vol 47 (6) ◽  
pp. 1122-1127 ◽  
Author(s):  
Christine M. Doucet ◽  
Edward J. Maly
Keyword(s):  
Equilibrium Point ◽  
Mathematical Analysis ◽  
Copper Toxicity ◽  
Copper Stress ◽  
Paramecium Caudatum ◽  
The Stability ◽  
Effect Of Copper ◽  
Predator Efficiency

Tests to determine acute copper toxicity levels demonstrated that the protozoan predator Didinium nasutum were more susceptible to copper stress than its prey Paramecium caudatum Thus we predicted that Paramecium and Didinium densities, at the equilibrium point of their interaction, would be higher at sublethal copper levels due to a decrease in the predator's efficiency. This situation is likely to produce a decrease in the stability of the system. However, isocline analysis did not support the predictions based on the acute lethality tests. Equilibrium densities of both predator and prey did not change at copper levels between 30 and 180 μg/L. The mathematical analysis suggested that the interaction became less stable with increasing copper concentrations. However, stability decreased due to hormesis in Didinium at sublethal copper levels and not due to a reduction in predator efficiency as expected. At 300 μg Cu/L, densities of both species at equilibrium were higher and the stability of the system decreased. This decrease in stability resulted from a reduction in predator efficiency, as 300 μg Cu/L is not sublethal for Didinium.

scholarly journals Conocarpus Mediated Improvement in Photosynthetic Pigments of Cicer arietinum Growing Under Copper Stress

2018 ◽  
Vol 9 (1) ◽  
pp. 41-49
Author(s):  
Shabana Askari ◽  
Hina Khurshid
Keyword(s):  
Cicer Arietinum ◽  
Photosynthetic Pigments ◽  
Block Design ◽  
Soluble Sugars ◽  
Cost Effective ◽  
Copper Stress ◽  
Randomized Block Design ◽  
Relative Water ◽  
Leaf Powder ◽  
Effect Of Copper

Present work was planned to investigate the improvement in photosynthetic pigments of Cicer arietinum by Conocarpus lancifolius growing under copper stress. Conocarpus lancifolius was chosen as a biosorbent because it is abundantly and easily available plant of Province Sindh. It does not require so much efforts or money or even water to cultivate them, moreover, it is a fast grower. Plants were grown in randomized block design in triplicates. Each pot was supplied with 1kg of soil, the control plants were supplied with distilled water only, experimental plants were supplied with different concentration of copper viz. 0, 25, 50, 75 and 100 ppm whereas treated plants were supplied with 5gm Conocarpus lancifolius leaf powder along with the different concentration of copper. Effect of Copper on Cicer arietinum and its biosorption by Conocarpus lancifolius was observed by the determination of photosynthetic pigments (chlorophyll a, b, total chlorophylls and carotenoids) and its products (glucose, sucrose and total soluble sugars). Various parameters were also analyzed to correlate and confirm our results like % germination, root and shoot lengths, leaf area and relative water content. C. lancifolius was found not only an efficient, eco-friendly and cost-effective biosorbent for heavy metal copper but it is also an effective fertilizer too.

Effect of copper stress on photosynthesis of navel orange seedlings

2009 ◽  
Vol 17 (1) ◽  
pp. 130-134 ◽  
Author(s):  
Guo-Jun ZHANG ◽  
Hong JIANG ◽  
Li-Qin ZHENG ◽  
Juan CHEN ◽  
Dong-Liang QIU ◽  
...  
Keyword(s):  
Copper Stress ◽  
Navel Orange ◽  
Effect Of Copper

scholarly journals Microalgae-Derived Pigments: A 10-Year Bibliometric Review and Industry and Market Trend Analysis

Molecules ◽  
2020 ◽  
Vol 25 (15) ◽  
pp. 3406 ◽  
Author(s):  
Samara C. Silva ◽  
Isabel C. F. R. Ferreira ◽  
Madalena M. Dias ◽  
M. Filomena Barreiro
Keyword(s):  
Spirulina Platensis ◽  
Dunaliella Salina ◽  
Haematococcus Pluvialis ◽  
Market Analysis ◽  
Microalgae Cultivation ◽  
Natural Pigments ◽  
Pigment Extraction ◽  
Bibliometric Review ◽  
Synthetic Pigments ◽  
Β Carotene

Microalgae productive chains are gaining importance as sustainable alternatives to obtain natural pigments. This work presents a review on the most promising pigments and microalgal sources by gathering trends from a 10-year bibliometric survey, a patents search, and an industrial and market analysis built from available market reports, projects and companies’ webpages. The performed analysis pointed out chlorophylls, phycocyanin, astaxanthin, and β-carotene as the most relevant pigments, and Chlorella vulgaris, Spirulina platensis, Haematococcus pluvialis, and Dunaliella salina, respectively, as the most studied sources. Haematococcus is referred in the highest number of patents, corroborating a high technological interest in this microalga. The biorefinery concept, investment in projects and companies related to microalgae cultivation and/or pigment extraction is increasingly growing, particularly, for phycocyanin from Spirulina platensis. These pieces of evidence are a step forward to consolidate the microalgal pigments market, which is expected to grow in the coming years, increasing the prospects of replacing synthetic pigments by natural counterparts.

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