Growth and lipid profiles of the Antarctic snow microalga Chlamydomonas sp. In response to changes in temperature, photoperiod, salinity and substrate

Abstract: The main objective of this study was to investigate culture substrates, stress conditions and cold-adaptive cellular lipid products of potential industrial interest associated with the short-term environmental adaptation by an Antarctic snow microalga. Viable culture lines of the Antarctic...

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Autores principales:	Cid-Agüero,Pedro, Cuello,Joel L., Ruiz,Sebastian, Sanchez,Gloria
Lenguaje:	English
Publicado:	Universidad de Magallanes 2017
Materias:	snow microalgae lipids content cold adaptation cryoprotectant photoperiod
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-686X2017000300045
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spelling	oai:scielo:S0718-686X20170003000452018-02-22Growth and lipid profiles of the Antarctic snow microalga Chlamydomonas sp. In response to changes in temperature, photoperiod, salinity and substrateCid-Agüero,PedroCuello,Joel L.Ruiz,SebastianSanchez,Gloria snow microalgae lipids content cold adaptation cryoprotectant photoperiod Abstract: The main objective of this study was to investigate culture substrates, stress conditions and cold-adaptive cellular lipid products of potential industrial interest associated with the short-term environmental adaptation by an Antarctic snow microalga. Viable culture lines of the Antarctic snow microalga Chlamydomonas sp. (DPA-02 strain) were obtained after two years storage period at -4 oC without light source. The dark- adapted Chlamydomonas sp. exhibited high sensitivity to light, growing optimally on Bristol media under a light level of 10 μmol m-2 s-1 and a temperature of 12 ± 2°C. The snow microalga yielded 93% of its lipid content as saturated fatty acids, 67% of which was palmitic acid (C16:0). The study also showed the significant alteration of the microalga’s lipid profile by modifying the culture’s growing conditions, resulting in a significant increase in PUFA’s independently of the culture temperature, from about 10% to 70%, when the culture was subjected to continuous darkness over a one-month period. The growth rate of the microalga decreased with increase in NaCl concentration in the growing medium. Further, the microalga was found to be sensitive to the physical matrix on which it grew, showing a higher mortality rate when exposed to a low-temperature shock on a solid medium different than snow or ice. These results provided unprecedented insights into cryoprotective strategies employed by snow microalgae to survive under the severe environmental conditions of Antarctica.info:eu-repo/semantics/openAccessUniversidad de MagallanesAnales del Instituto de la Patagonia v.45 n.3 20172017-12-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-686X2017000300045en10.4067/S0718-686X2017000300045
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	snow microalgae lipids content cold adaptation cryoprotectant photoperiod
spellingShingle	snow microalgae lipids content cold adaptation cryoprotectant photoperiod Cid-Agüero,Pedro Cuello,Joel L. Ruiz,Sebastian Sanchez,Gloria Growth and lipid profiles of the Antarctic snow microalga Chlamydomonas sp. In response to changes in temperature, photoperiod, salinity and substrate
description	Abstract: The main objective of this study was to investigate culture substrates, stress conditions and cold-adaptive cellular lipid products of potential industrial interest associated with the short-term environmental adaptation by an Antarctic snow microalga. Viable culture lines of the Antarctic snow microalga Chlamydomonas sp. (DPA-02 strain) were obtained after two years storage period at -4 oC without light source. The dark- adapted Chlamydomonas sp. exhibited high sensitivity to light, growing optimally on Bristol media under a light level of 10 μmol m-2 s-1 and a temperature of 12 ± 2°C. The snow microalga yielded 93% of its lipid content as saturated fatty acids, 67% of which was palmitic acid (C16:0). The study also showed the significant alteration of the microalga’s lipid profile by modifying the culture’s growing conditions, resulting in a significant increase in PUFA’s independently of the culture temperature, from about 10% to 70%, when the culture was subjected to continuous darkness over a one-month period. The growth rate of the microalga decreased with increase in NaCl concentration in the growing medium. Further, the microalga was found to be sensitive to the physical matrix on which it grew, showing a higher mortality rate when exposed to a low-temperature shock on a solid medium different than snow or ice. These results provided unprecedented insights into cryoprotective strategies employed by snow microalgae to survive under the severe environmental conditions of Antarctica.
author	Cid-Agüero,Pedro Cuello,Joel L. Ruiz,Sebastian Sanchez,Gloria
author_facet	Cid-Agüero,Pedro Cuello,Joel L. Ruiz,Sebastian Sanchez,Gloria
author_sort	Cid-Agüero,Pedro
title	Growth and lipid profiles of the Antarctic snow microalga Chlamydomonas sp. In response to changes in temperature, photoperiod, salinity and substrate
title_short	Growth and lipid profiles of the Antarctic snow microalga Chlamydomonas sp. In response to changes in temperature, photoperiod, salinity and substrate
title_full	Growth and lipid profiles of the Antarctic snow microalga Chlamydomonas sp. In response to changes in temperature, photoperiod, salinity and substrate
title_fullStr	Growth and lipid profiles of the Antarctic snow microalga Chlamydomonas sp. In response to changes in temperature, photoperiod, salinity and substrate
title_full_unstemmed	Growth and lipid profiles of the Antarctic snow microalga Chlamydomonas sp. In response to changes in temperature, photoperiod, salinity and substrate
title_sort	growth and lipid profiles of the antarctic snow microalga chlamydomonas sp. in response to changes in temperature, photoperiod, salinity and substrate
publisher	Universidad de Magallanes
publishDate	2017
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-686X2017000300045
work_keys_str_mv	AT cidagueropedro growthandlipidprofilesoftheantarcticsnowmicroalgachlamydomonasspinresponsetochangesintemperaturephotoperiodsalinityandsubstrate AT cuellojoell growthandlipidprofilesoftheantarcticsnowmicroalgachlamydomonasspinresponsetochangesintemperaturephotoperiodsalinityandsubstrate AT ruizsebastian growthandlipidprofilesoftheantarcticsnowmicroalgachlamydomonasspinresponsetochangesintemperaturephotoperiodsalinityandsubstrate AT sanchezgloria growthandlipidprofilesoftheantarcticsnowmicroalgachlamydomonasspinresponsetochangesintemperaturephotoperiodsalinityandsubstrate
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Growth and lipid profiles of the Antarctic snow microalga Chlamydomonas sp. In response to changes in temperature, photoperiod, salinity and substrate

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