Geographic variation in biochemical and physiological traits of the red seaweeds Chondracanthus chamissoi and Gelidium lingulatum from the south east Pacific coast

Geographic variation in biochemical and physiological traits of the red seaweeds Chondracanthus... Diverse phenotypic characteristics have evolved in seaweeds to cope with environmental stress, but these traits can vary among populations of the same species especially if these are distributed along environmental gradients. In this study, natural populations of the carrageenophyte Chondracanthus chamissoi and the agarophyte Gelidium lingulatum from a latitudinal gradient along the Chilean coast (between 20° S and 41° S) were compared. We determined physiological and biochemical traits in field and culture samples. Sulfated polysaccharide contents ranged from 15.4 to 52.7% dry weight (DW) in C. chamissoi and from 10.9 to 25.1% DW in G. lingulatum. Carrageenan amounts were higher in gametophytes than tetrasporophytes and were also, depending on life cycle phase, negatively correlated with the geographic variation of temperature, photosynthetically active radiation (PAR), and chlorophyll a (Chl a), whereas agar showed no significant correlation with these variables. The UV-absorbing mycosporine-like −1 amino acids (MAAs) shinorine and palythine in both species ranged from 0.8 to 6.8 mg g DW and these contents were positively correlated to PAR and Chl a levels at the sampling site. In C. chamissoi variation among populations in their photosynthetic characteristics, pigment concentrations, antioxidant capacity, and MAA contents were persistent after acclimation under common-garden conditions, http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Applied Phycology Springer Journals

Geographic variation in biochemical and physiological traits of the red seaweeds Chondracanthus chamissoi and Gelidium lingulatum from the south east Pacific coast

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Publisher
Springer Netherlands
Copyright
Copyright © 2018 by Springer Science+Business Media B.V., part of Springer Nature
Subject
Life Sciences; Plant Sciences; Freshwater & Marine Ecology; Plant Physiology; Ecology
ISSN
0921-8971
eISSN
1573-5176
D.O.I.
10.1007/s10811-018-1532-0
Publisher site
See Article on Publisher Site

Abstract

Diverse phenotypic characteristics have evolved in seaweeds to cope with environmental stress, but these traits can vary among populations of the same species especially if these are distributed along environmental gradients. In this study, natural populations of the carrageenophyte Chondracanthus chamissoi and the agarophyte Gelidium lingulatum from a latitudinal gradient along the Chilean coast (between 20° S and 41° S) were compared. We determined physiological and biochemical traits in field and culture samples. Sulfated polysaccharide contents ranged from 15.4 to 52.7% dry weight (DW) in C. chamissoi and from 10.9 to 25.1% DW in G. lingulatum. Carrageenan amounts were higher in gametophytes than tetrasporophytes and were also, depending on life cycle phase, negatively correlated with the geographic variation of temperature, photosynthetically active radiation (PAR), and chlorophyll a (Chl a), whereas agar showed no significant correlation with these variables. The UV-absorbing mycosporine-like −1 amino acids (MAAs) shinorine and palythine in both species ranged from 0.8 to 6.8 mg g DW and these contents were positively correlated to PAR and Chl a levels at the sampling site. In C. chamissoi variation among populations in their photosynthetic characteristics, pigment concentrations, antioxidant capacity, and MAA contents were persistent after acclimation under common-garden conditions,

Journal

Journal of Applied PhycologySpringer Journals

Published: Jun 4, 2018

References

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