Attenuation of photosynthetically active radiation and ultraviolet radiation in response to changing dissolved organic carbon in browning lakes: Modeling and parametrization

2021 ◽  
Author(s):  
Rachel M. Pilla ◽  
Raoul‐Marie Couture
Keyword(s):  
Organic Carbon ◽  
Ultraviolet Radiation ◽  
Dissolved Organic Carbon ◽  
Photosynthetically Active Radiation ◽  
Active Radiation

Interactive Effects of Ultraviolet Radiation and Dissolved Organic Carbon on Phytoplankton Growth and Photosynthesis in Sanya Bay, Northern South China Sea

2019 ◽  
Vol 54 (4) ◽  
pp. 581-593
Author(s):  
Jianzu Liao ◽  
Jie Xu ◽  
Xiangcheng Yuan ◽  
Yuxian Liang ◽  
Yajuan Guo ◽  
...  
Keyword(s):  
Organic Carbon ◽  
South China Sea ◽  
Ultraviolet Radiation ◽  
Dissolved Organic Carbon ◽  
South China ◽  
Northern South China Sea ◽  
Phytoplankton Growth ◽  
Interactive Effects ◽  
China Sea ◽  
Sanya Bay

scholarly journals Cumulative Effects of Ultraviolet Radiation and Photosyntheically Active Radiation on Phycobiliproteins of A Hot-Spring Cyanobacatrium Nostoc sp. strain HKAR-2

2016 ◽  
Vol 4 (3) ◽  
pp. 247-253
Author(s):  
Vinod K. Kannaujiya ◽  
Akhlaqur Rahman ◽  
. Adinath ◽  
Arun S. Sonker ◽  
Jainendra Pathak ◽  
...  
Keyword(s):  
Ultraviolet Radiation ◽  
Environmental Conditions ◽  
Photosynthetically Active Radiation ◽  
Biomedical Applications ◽  
Hot Spring ◽  
Ultraviolet B ◽  
Cumulative Effects ◽  
Key Factors ◽  
Active Radiation ◽  
Continuous Induction

Cyanobacteria are cosmopolitan in distribution and have adapted to diverse habitats. Adaptation of cyanobacteria is one of the key factors to withstand harsh environmental conditions. We have investigated the effects of photosynthetically active radiation (PAR; 400–700 nm), ultraviolet-B (UV-B; 280–315 nm) radiation and PAR+UV-B radiations on phycobiliproteins (PBPs) of a hot-spring cyanobacterium Nostoc sp. HKAR-2. There was a continuous induction of both phycoerythrin (PE) and phycocyanin (PC) after exposure of PAR up to 300 min. However, there was an induction in the synthesis of both PE and PC up to 240 min exposure of UV-B and PAR+UV-B radiations. Further exposure showed decline in the synthesis due to rapid uncoupling, bleaching and degradation of PBPs. Similarly, emission fluorescence also showed an induction with a shift towards longer wavelengths after 240 min of UV-B and PAR+UV-B exposure. These results indicate that short duration of UV radiation may promote the synthesis of PBPs that can be utilized in various biotechnological and biomedical applications. Int J Appl Sci Biotechnol, Vol 4(3): 247-253

Natural ultraviolet radiation and photosynthetically active radiation induce formation of mycosporine-like amino acids in the marine macroalga Chondrus crispus (Rhodophyta)

Planta ◽  
1998 ◽  
Vol 205 (2) ◽  
pp. 257-262 ◽  
Author(s):  
Ulf Karsten ◽  
Linda A. Franklin ◽  
Klaus Lüning ◽  
Christian Wiencke
Keyword(s):  
Amino Acids ◽  
Ultraviolet Radiation ◽  
Photosynthetically Active Radiation ◽  
Chondrus Crispus ◽  
Active Radiation ◽  
Marine Macroalga

The Role of Iron and Dissolved Organic Carbon in the Absorption of Ultraviolet Radiation in Humic Lake Water

2005 ◽  
Vol 75 (3) ◽  
pp. 393-407 ◽  
Author(s):  
Kelly O. Maloney ◽  
Donald P. Morris ◽  
Carl O. Moses ◽  
Christopher L. Osburn
Keyword(s):  
Organic Carbon ◽  
Ultraviolet Radiation ◽  
Dissolved Organic Carbon ◽  
Lake Water ◽  
Humic Lake

scholarly journals The attenuation of ultraviolet radiation in high dissolved organic carbon waters of wetlands and lakes on the northern Great Plains

2000 ◽  
Vol 45 (2) ◽  
pp. 292-299 ◽  
Author(s):  
Michael T. Arts ◽  
Richard D. Robarts ◽  
Fumie Kasai ◽  
Marley J. Waiser ◽  
Vijay P. Tumber ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Ultraviolet Radiation ◽  
Dissolved Organic Carbon ◽  
Great Plains ◽  
Northern Great Plains

Penetration of solar ultraviolet radiation into New Zealand lakes: influence of dissolved organic carbon and catchment vegetation

Limnology ◽  
2001 ◽  
Vol 2 (2) ◽  
pp. 79-89 ◽  
Author(s):  
R. Rae ◽  
C. Howard-Williams ◽  
I. Hawes ◽  
A.-M. Schwarz ◽  
W. F. Vincent
Keyword(s):  
New Zealand ◽  
Organic Carbon ◽  
Ultraviolet Radiation ◽  
Dissolved Organic Carbon ◽  
Solar Ultraviolet Radiation ◽  
Solar Ultraviolet

Effects of Natural Radiation, Photosynthetically Active Radiation and Artificial Ultraviolet Radiation-B on the Chloroplast Organization and Metabolism ofPorphyra acanthophoravar.brasiliensis(Rhodophyta, Bangiales)

2012 ◽  
Vol 18 (6) ◽  
pp. 1467-1479 ◽  
Author(s):  
Zenilda L. Bouzon ◽  
Fungyi Chow ◽  
Carmen S. Zitta ◽  
Rodrigo W. dos Santos ◽  
Luciane C. Ouriques ◽  
...  
Keyword(s):  
Ultraviolet Radiation ◽  
Photosynthetically Active Radiation ◽  
Laser Scanning ◽  
Reductase Activity ◽  
Laser Scanning Microscopy ◽  
Confocal Laser ◽  
Ambient Conditions ◽  
Natural Radiation ◽  
Active Radiation ◽  
Ultraviolet Radiation B

AbstractWe undertook a study ofPorphyra acanthophoravar.brasiliensisto determine its responses under ambient conditions, photosynthetically active radiation (PAR), and PAR+UVBR (ultraviolet radiation-B) treatment, focusing on changes in ultrastructure, and cytochemistry. Accordingly, control ambient samples were collected in the field, and two different treatments were performed in the laboratory. Plants were exposed to PAR at 60 μmol photons m−2s−1and PAR + UVBR at 0.35 W m−2for 3 h per day during 21 days ofin vitrocultivation. Confocal laser scanning microscopy analysis of the vegetative cells showed single stellate chloroplast in ambient and PAR samples, but in PAR+UVBR-exposed plants, the chloroplast showed alterations in the number and form of arms. Under PAR+UVBR treatment, the thylakoids of the chloroplasts were disrupted, and an increase in the number of plastoglobuli was observed, in addition to mitochondria, which appeared with irregular, disrupted morphology compared to ambient and PAR samples. After UVBR exposure, the formation of carpospores was also observed. Plants under ambient conditions, as well as those treated with PAR and PAR+UVBR, all showed different concentrations of enzymatic response, including glutathione peroxidase and reductase activity. In summary, the present study demonstrates thatP. acanthophoravar.brasiliensisshows the activation of distinct mechanisms against natural radiation, PAR and PAR+UVBR.

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