Light acclimation of photosynthesis in three charophyte species

The main aim of this study was to investigate if the charophyte species Chara baltica, Chara canescens (two populations from the Baltic Sea (BS) and the Gulf of Korinth, Greece (GK)), and Lamprothamnium papulosum exhibit different acclimation capacities to irradiance. Growth, photosynthesis and pigm...

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Veröffentlicht in:Aquatic botany 2004-06, Vol.79 (2), p.111-124
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description The main aim of this study was to investigate if the charophyte species Chara baltica, Chara canescens (two populations from the Baltic Sea (BS) and the Gulf of Korinth, Greece (GK)), and Lamprothamnium papulosum exhibit different acclimation capacities to irradiance. Growth, photosynthesis and pigment content were examined in the laboratory under six irradiance conditions (35–500 μmol photons m −2 s −1). Growth experiments showed increasing growth rates from 35 μmol photons m −2 s −1 (∼10 mg fresh weight (FW)) up to 70 μmol photons m −2 s −1 (∼20 mg FW) in C. baltica, from 35 μmol photons m −2 s −1 (∼15 mg FW) up to 380 μmol photons m −2 s −1 (∼145 mg FW) in C. canescens (BS), and up to the highest growth irradiance in algae of L. papulosum (35 μmol: ∼5 mg FW; 500 μmol: ∼20 mg FW). The species were tested for their ability to acclimate to different growth irradiances ( E g) by calculating P max (maximum photosynthesis rate at saturating irradiances), α (the efficiency of light utilization at limiting irradiance), and E k (the light saturation point of photosynthesis, P max/ α). All species exhibited increasing P max with increasing E g. Whereas both populations of C. canescens increased α with increasing E g, L. papulosum and C. baltica did not acclimate α at all. E k, the irradiance at which photosynthesis ceased to be light-limited, was constant for all Chara species within the range of irradiances tested. Chl a/Chl b ratios of all species were constant over the whole range of E g. Chl a/carotenoid ratios were constant in C. baltica, whereas Chl a/carotenoid ratios in L. papulosum and C. canescens (BS) decreased from 250 and 70 μmol photons m −2 s −1 upwards, respectively. Pigmentation analysis showed that Chl a/carotenoid acclimation was mainly caused by species-specific capacity to raise the content of lutein and carotene ( C. canescens (BS), C. canescens (GK)) and xanthophyll cycle pigments (XCP; L. papulosum). The non-photochemical quenching (NPQ) capacities of L. papulosum, C. canescens (BS), and C. canescens (GK) were dependent from preacclimation status of algae, whereas NPQ of C. baltica was independent from growth irradiance. Our results indicate that C. baltica and C. canescens (BS) were light saturated within the chosen irradiances, whereas C. canescens (GK) and L. papulosum did not reach their limits of high-light acclimation. The photosynthetic pigments lutein, α- and β-carotene are suggested to act as photo-protective pigments in L. papulo
doi_str_mv 10.1016/j.aquabot.2004.01.010
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Growth, photosynthesis and pigment content were examined in the laboratory under six irradiance conditions (35–500 μmol photons m −2 s −1). Growth experiments showed increasing growth rates from 35 μmol photons m −2 s −1 (∼10 mg fresh weight (FW)) up to 70 μmol photons m −2 s −1 (∼20 mg FW) in C. baltica, from 35 μmol photons m −2 s −1 (∼15 mg FW) up to 380 μmol photons m −2 s −1 (∼145 mg FW) in C. canescens (BS), and up to the highest growth irradiance in algae of L. papulosum (35 μmol: ∼5 mg FW; 500 μmol: ∼20 mg FW). The species were tested for their ability to acclimate to different growth irradiances ( E g) by calculating P max (maximum photosynthesis rate at saturating irradiances), α (the efficiency of light utilization at limiting irradiance), and E k (the light saturation point of photosynthesis, P max/ α). All species exhibited increasing P max with increasing E g. Whereas both populations of C. canescens increased α with increasing E g, L. papulosum and C. baltica did not acclimate α at all. E k, the irradiance at which photosynthesis ceased to be light-limited, was constant for all Chara species within the range of irradiances tested. Chl a/Chl b ratios of all species were constant over the whole range of E g. Chl a/carotenoid ratios were constant in C. baltica, whereas Chl a/carotenoid ratios in L. papulosum and C. canescens (BS) decreased from 250 and 70 μmol photons m −2 s −1 upwards, respectively. Pigmentation analysis showed that Chl a/carotenoid acclimation was mainly caused by species-specific capacity to raise the content of lutein and carotene ( C. canescens (BS), C. canescens (GK)) and xanthophyll cycle pigments (XCP; L. papulosum). The non-photochemical quenching (NPQ) capacities of L. papulosum, C. canescens (BS), and C. canescens (GK) were dependent from preacclimation status of algae, whereas NPQ of C. baltica was independent from growth irradiance. Our results indicate that C. baltica and C. canescens (BS) were light saturated within the chosen irradiances, whereas C. canescens (GK) and L. papulosum did not reach their limits of high-light acclimation. 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Growth, photosynthesis and pigment content were examined in the laboratory under six irradiance conditions (35–500 μmol photons m −2 s −1). Growth experiments showed increasing growth rates from 35 μmol photons m −2 s −1 (∼10 mg fresh weight (FW)) up to 70 μmol photons m −2 s −1 (∼20 mg FW) in C. baltica, from 35 μmol photons m −2 s −1 (∼15 mg FW) up to 380 μmol photons m −2 s −1 (∼145 mg FW) in C. canescens (BS), and up to the highest growth irradiance in algae of L. papulosum (35 μmol: ∼5 mg FW; 500 μmol: ∼20 mg FW). The species were tested for their ability to acclimate to different growth irradiances ( E g) by calculating P max (maximum photosynthesis rate at saturating irradiances), α (the efficiency of light utilization at limiting irradiance), and E k (the light saturation point of photosynthesis, P max/ α). All species exhibited increasing P max with increasing E g. Whereas both populations of C. canescens increased α with increasing E g, L. papulosum and C. baltica did not acclimate α at all. E k, the irradiance at which photosynthesis ceased to be light-limited, was constant for all Chara species within the range of irradiances tested. Chl a/Chl b ratios of all species were constant over the whole range of E g. Chl a/carotenoid ratios were constant in C. baltica, whereas Chl a/carotenoid ratios in L. papulosum and C. canescens (BS) decreased from 250 and 70 μmol photons m −2 s −1 upwards, respectively. Pigmentation analysis showed that Chl a/carotenoid acclimation was mainly caused by species-specific capacity to raise the content of lutein and carotene ( C. canescens (BS), C. canescens (GK)) and xanthophyll cycle pigments (XCP; L. papulosum). The non-photochemical quenching (NPQ) capacities of L. papulosum, C. canescens (BS), and C. canescens (GK) were dependent from preacclimation status of algae, whereas NPQ of C. baltica was independent from growth irradiance. Our results indicate that C. baltica and C. canescens (BS) were light saturated within the chosen irradiances, whereas C. canescens (GK) and L. papulosum did not reach their limits of high-light acclimation. The photosynthetic pigments lutein, α- and β-carotene are suggested to act as photo-protective pigments in L. papulosum and C. canescens.</description><subject>Algae</subject><subject>Chara baltica</subject><subject>Chara canescens</subject><subject>Charophyceae</subject><subject>Irradiance</subject><subject>Lamprothamnium</subject><subject>Lamprothamnium papulosum</subject><subject>Marine</subject><subject>Photosynthesis</subject><subject>Pigmentation</subject><issn>0304-3770</issn><issn>1879-1522</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2004</creationdate><recordtype>article</recordtype><recordid>eNqNkUtLAzEUhYMoWKs_QZiVuJnx5s4jM6sixRcU3Og6ZNIbJ6WdTJNU6L93SrtW4cDdfOdwOYexWw4ZB149rDK13anWxQwBigz4KDhjE16LJuUl4jmbQA5FmgsBl-wqhBUA8BrEhM0W9quLidJ6bTcqWtcnziRD56IL-z52FGxIbJ_EzhMlulPeDd0-UhIG0pbCNbswah3o5nSn7PP56WP-mi7eX97mj4tUF4AxNQIQ85bnHATqohEVJ62NEk1lNBqkHHhRYA4ltBqxFdiWOH6-rIQBbZp8yu6OuYN32x2FKDc2aFqvVU9uFyRCXYq6Lv4BokCs6xG8_xXkVVUWTS7ggJZHVHsXgicjBz-25feSgzxMIFfyNIE8TCCBj4LRNzv6aGzm25KXYeys17S0nnSUS2f_SPgBXDyQ6Q</recordid><startdate>20040601</startdate><enddate>20040601</enddate><creator>Küster, Anette</creator><creator>Schaible, Ralf</creator><creator>Schubert, Hendrik</creator><general>Elsevier B.V</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7TN</scope><scope>7UA</scope><scope>C1K</scope><scope>F1W</scope><scope>H96</scope><scope>L.G</scope><scope>M7N</scope><scope>H95</scope><scope>7SN</scope></search><sort><creationdate>20040601</creationdate><title>Light acclimation of photosynthesis in three charophyte species</title><author>Küster, Anette ; Schaible, Ralf ; Schubert, Hendrik</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c402t-f70223b131072c49761eccfa796fc2f2e3014423050bc22b72b52522d67f0cf93</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2004</creationdate><topic>Algae</topic><topic>Chara baltica</topic><topic>Chara canescens</topic><topic>Charophyceae</topic><topic>Irradiance</topic><topic>Lamprothamnium</topic><topic>Lamprothamnium papulosum</topic><topic>Marine</topic><topic>Photosynthesis</topic><topic>Pigmentation</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Küster, Anette</creatorcontrib><creatorcontrib>Schaible, Ralf</creatorcontrib><creatorcontrib>Schubert, Hendrik</creatorcontrib><collection>CrossRef</collection><collection>Oceanic Abstracts</collection><collection>Water Resources Abstracts</collection><collection>Environmental Sciences and Pollution Management</collection><collection>ASFA: Aquatic Sciences and Fisheries Abstracts</collection><collection>Aquatic Science &amp; Fisheries Abstracts (ASFA) 2: Ocean Technology, Policy &amp; Non-Living Resources</collection><collection>Aquatic Science &amp; Fisheries Abstracts (ASFA) Professional</collection><collection>Algology Mycology and Protozoology Abstracts (Microbiology C)</collection><collection>Aquatic Science &amp; Fisheries Abstracts (ASFA) 1: Biological Sciences &amp; Living Resources</collection><collection>Ecology Abstracts</collection><jtitle>Aquatic botany</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Küster, Anette</au><au>Schaible, Ralf</au><au>Schubert, Hendrik</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Light acclimation of photosynthesis in three charophyte species</atitle><jtitle>Aquatic botany</jtitle><date>2004-06-01</date><risdate>2004</risdate><volume>79</volume><issue>2</issue><spage>111</spage><epage>124</epage><pages>111-124</pages><issn>0304-3770</issn><eissn>1879-1522</eissn><abstract>The main aim of this study was to investigate if the charophyte species Chara baltica, Chara canescens (two populations from the Baltic Sea (BS) and the Gulf of Korinth, Greece (GK)), and Lamprothamnium papulosum exhibit different acclimation capacities to irradiance. Growth, photosynthesis and pigment content were examined in the laboratory under six irradiance conditions (35–500 μmol photons m −2 s −1). Growth experiments showed increasing growth rates from 35 μmol photons m −2 s −1 (∼10 mg fresh weight (FW)) up to 70 μmol photons m −2 s −1 (∼20 mg FW) in C. baltica, from 35 μmol photons m −2 s −1 (∼15 mg FW) up to 380 μmol photons m −2 s −1 (∼145 mg FW) in C. canescens (BS), and up to the highest growth irradiance in algae of L. papulosum (35 μmol: ∼5 mg FW; 500 μmol: ∼20 mg FW). The species were tested for their ability to acclimate to different growth irradiances ( E g) by calculating P max (maximum photosynthesis rate at saturating irradiances), α (the efficiency of light utilization at limiting irradiance), and E k (the light saturation point of photosynthesis, P max/ α). All species exhibited increasing P max with increasing E g. Whereas both populations of C. canescens increased α with increasing E g, L. papulosum and C. baltica did not acclimate α at all. E k, the irradiance at which photosynthesis ceased to be light-limited, was constant for all Chara species within the range of irradiances tested. Chl a/Chl b ratios of all species were constant over the whole range of E g. Chl a/carotenoid ratios were constant in C. baltica, whereas Chl a/carotenoid ratios in L. papulosum and C. canescens (BS) decreased from 250 and 70 μmol photons m −2 s −1 upwards, respectively. Pigmentation analysis showed that Chl a/carotenoid acclimation was mainly caused by species-specific capacity to raise the content of lutein and carotene ( C. canescens (BS), C. canescens (GK)) and xanthophyll cycle pigments (XCP; L. papulosum). The non-photochemical quenching (NPQ) capacities of L. papulosum, C. canescens (BS), and C. canescens (GK) were dependent from preacclimation status of algae, whereas NPQ of C. baltica was independent from growth irradiance. Our results indicate that C. baltica and C. canescens (BS) were light saturated within the chosen irradiances, whereas C. canescens (GK) and L. papulosum did not reach their limits of high-light acclimation. The photosynthetic pigments lutein, α- and β-carotene are suggested to act as photo-protective pigments in L. papulosum and C. canescens.</abstract><pub>Elsevier B.V</pub><doi>10.1016/j.aquabot.2004.01.010</doi><tpages>14</tpages></addata></record>
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ispartof Aquatic botany, 2004-06, Vol.79 (2), p.111-124
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source Elsevier ScienceDirect Journals Complete
subjects Algae
Chara baltica
Chara canescens
Charophyceae
Irradiance
Lamprothamnium
Lamprothamnium papulosum
Marine
Photosynthesis
Pigmentation
title Light acclimation of photosynthesis in three charophyte species
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