The impact of fluctuating light on the dinoflagellate Prorocentrum micans depends on NO3- and CO2 availability

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388971%3A_____%2F15%3A00472751" target="_blank" >RIV/61388971:_____/15:00472751 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1016/j.jplph.2015.01.020" target="_blank" >http://dx.doi.org/10.1016/j.jplph.2015.01.020</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jplph.2015.01.020" target="_blank" >10.1016/j.jplph.2015.01.020</a>

Result language

angličtina

Original language name

The impact of fluctuating light on the dinoflagellate Prorocentrum micans depends on NO3- and CO2 availability

Original language description

ncreasing atmospheric pCO(2) and its dissolution into oceans leads to ocean acidification and warming, which reduces the thickness of upper mixing layer (UML) and upward nutrient supply from deeper layers. These events may alter the nutritional conditions and the light regime to which primary producers are exposed in the UML. In order to better understand the physiology behind the responses to the concomitant climate changes factors, we examined the impact of light fluctuation on the dinoflagellate Prorocentrum micans grown at low (1 mu mol L-1) or high (800 mu mol L-1) [NO3-] and at high (1000 mu atm) or low (390 mu atm, ambient) pCO(2). The light regimes to which the algal cells were subjected were (1) constant light at a photon flux density (PFD) of either 100 (C100) or 500 (C500) mu mol m(-2) s(-1) or (2) fluctuating light between 100 or 500 mu mol photons m(-2) s(-1) with a frequency of either 15 (F15) or 60 (F60) min. Under continuous light, the initial portion of the light phase required the concomitant presence of high CO2 and NO3- concentrations for maximum growth. After exposure to light for 3 h, high CO2 exerted a negative effect on growth and effective quantum yield of photosystem II (F-v(')/F-m(')). Fluctuating light ameliorated growth in the first period of illumination. In the second 3 h of treatment, higher frequency (F15) of fluctuations afforded high growth rates, whereas the F60 treatment had detrimental consequences, especially when NO3- concentration was lower. F-v(')/F-m(') responded differently from growth to fluctuating light: the fluorescence yield was always lower than at continuous light at 100 mu mol m(-2) s(-1), and always higher at 500 mu mol m(-2) s(-1). Our data show that the impact of atmospheric pCO(2) increase on primary production of dinoflagellate depends on the availability of nitrate and the irradiance (intensity and the frequency of irradiance fluctuations) to which the cells are exposed.

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

EE - Microbiology, virology

OECD FORD branch

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Project

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Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2015

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Journal of Plant Physiology

ISSN

0176-1617

e-ISSN

—

Volume of the periodical

180

Issue of the periodical within the volume

MAY 15

Country of publishing house

PT - PORTUGAL

Number of pages

9

Pages from-to

18-26

UT code for WoS article

000354186000002

EID of the result in the Scopus database

2-s2.0-84927738010