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Phenotypic Response of Marine Crypto...

Heidenreich, Kristin M.

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Phenotypic Response of Marine Cryptophytes to Varying Spectral Irradiance.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Phenotypic Response of Marine Cryptophytes to Varying Spectral Irradiance./
Author:	Heidenreich, Kristin M.
Published:	Ann Arbor : ProQuest Dissertations & Theses, : 2018,
Description:	56 p.
Notes:	Source: Masters Abstracts International, Volume: 80-05.
Contained By:	Masters Abstracts International80-05.
Subject:	Biological oceanography. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10841818
ISBN:	9780438549913

Phenotypic Response of Marine Cryptophytes to Varying Spectral Irradiance.
Heidenreich, Kristin M.

Phenotypic Response of Marine Cryptophytes to Varying Spectral Irradiance. - Ann Arbor : ProQuest Dissertations & Theses, 2018 - 56 p.

Source: Masters Abstracts International, Volume: 80-05.

Thesis (M.S.)--University of South Carolina, 2018.

This item is not available from ProQuest Dissertations & Theses.

Cryptophytes are eukaryotic algae found in a variety of aquatic ecosystems, that vary in the color of light available for photosynthesis. Cryptophytes display a diversity in pigmentation, possessing either phycoerythrin (Cr-PE; "pink") phycocyanin (Cr-PC; "green"). According to the theory of complementary chromatic adaptation, this diversity should help them maximize their absorption of light within their environments. The goal of this study was to determine if pigmentation related to growth performance in environments of differing spectral irradiance. I grew eight species of marine cryptophytes (5 Cr-PE and 3 Cr-PC species) under four different light environments. Growth rates, cellular pigment concentration and volume, and absorption spectra were determined for all experimental species and light treatments. All Cr-PE species grew fastest under blue light (0.4 to 0.6 d -1 depending on species), indicating the efficient absorbance of blue photons by their Cr-PEs and by non-PE pigments. Cr-PC cryptophytes grew fastest under red, white, or blue light depending on the species (0.5 to 0.8 d-1), which Cr-PC they contained and their complement of non-PC pigments. All Cr-PC species grew slowest under green light (0.3 to 0.5 d-1). Spectral irradiance had a significant impact on cellular pigment concentrations and cellular volumes; however, the results varied on a species by species basis. This study showed that cryptophytes could acclimate to novel environments, as no mortality was observed. Future studies will look at longer term acclimation (at the scale of years) to determine if cryptophytes show adaptive capabilities that are expressed at the genetic level.

ISBN: 9780438549913Subjects--Topical Terms:

2122748
Biological oceanography.

Phenotypic Response of Marine Cryptophytes to Varying Spectral Irradiance.
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245 1 0 $a Phenotypic Response of Marine Cryptophytes to Varying Spectral Irradiance.
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300 $a 56 p.
500 $a Source: Masters Abstracts International, Volume: 80-05.
500 $a Publisher info.: Dissertation/Thesis.
500 $a Advisor: Richardson, Tammi L.
502 $a Thesis (M.S.)--University of South Carolina, 2018.
506 $a This item is not available from ProQuest Dissertations & Theses.
506 $a This item must not be sold to any third party vendors.
520 $a Cryptophytes are eukaryotic algae found in a variety of aquatic ecosystems, that vary in the color of light available for photosynthesis. Cryptophytes display a diversity in pigmentation, possessing either phycoerythrin (Cr-PE; "pink") phycocyanin (Cr-PC; "green"). According to the theory of complementary chromatic adaptation, this diversity should help them maximize their absorption of light within their environments. The goal of this study was to determine if pigmentation related to growth performance in environments of differing spectral irradiance. I grew eight species of marine cryptophytes (5 Cr-PE and 3 Cr-PC species) under four different light environments. Growth rates, cellular pigment concentration and volume, and absorption spectra were determined for all experimental species and light treatments. All Cr-PE species grew fastest under blue light (0.4 to 0.6 d -1 depending on species), indicating the efficient absorbance of blue photons by their Cr-PEs and by non-PE pigments. Cr-PC cryptophytes grew fastest under red, white, or blue light depending on the species (0.5 to 0.8 d-1), which Cr-PC they contained and their complement of non-PC pigments. All Cr-PC species grew slowest under green light (0.3 to 0.5 d-1). Spectral irradiance had a significant impact on cellular pigment concentrations and cellular volumes; however, the results varied on a species by species basis. This study showed that cryptophytes could acclimate to novel environments, as no mortality was observed. Future studies will look at longer term acclimation (at the scale of years) to determine if cryptophytes show adaptive capabilities that are expressed at the genetic level.
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