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The Effects of NO 3 − Supply on Mazzaella laminarioides (Rhodophyta, Gigartinales) from Southern Chile
Author(s) -
Navarro Nelso P.,
Figueroa Félix L.,
Korbee Nathalie,
Mansilla Andrés,
Matsuhiro Betty,
Barahona Tamara,
Plastino Estela M.
Publication year - 2014
Publication title -
photochemistry and photobiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.818
H-Index - 131
eISSN - 1751-1097
pISSN - 0031-8655
DOI - 10.1111/php.12344
Subject(s) - gigartinales , carrageenan , nitrate , mariculture , seawater , phycocyanin , algae , phycoerythrin , botany , biology , glycine , nitrogen , yield (engineering) , chemistry , aquaculture , ecology , food science , amino acid , cyanobacteria , fishery , biochemistry , bacteria , flow cytometry , genetics , materials science , fish <actinopterygii> , metallurgy , organic chemistry
The effects of nitrate supply on growth, pigments, mycosporine‐like amino acids (MAAs), C:N ratios and carrageenan yield were investigated in Mazzaella laminarioides cultivated under solar radiation. This species is economically important in southern Chile where an increase of nitrogen in coastal waters is expected as a consequence of salmon aquaculture activity. Apical segments were cultivated in enriched seawater with five different NO 3 − concentrations (0, 0.09, 0.18, 0.38 and 0.75 m m ) during 18 days. Although phycoerythrin and phycocyanin content, as well as C:N ratios, were reduced in the control treatment (without NO 3 − supply), when compared to NO 3 − treatments, total MAA concentration, carrageenan yield and growth rates were similar in all tested conditions. Nevertheless, during the experiment, an important synthesis of mycosporine‐glycine took place in a nitrate concentration‐dependent manner, with accumulation being saturated around 0.18 m m of nitrate. These results indicate that exposure to high NO 3 − concentration of more than 100 times the values observed in the nature did not impair the photoprotection system, as determined by MAAs, nor did it have a deleterious effect on growth or carrageenan yield of M. laminarioides , a late successional species from Chile.