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231225s2001 xx |||||o 00| ||eng c |
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|a 10.1046/j.1469-8137.2001.00050.x
|2 doi
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|a eng
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|a Mercado, Jesús M
|e verfasserin
|4 aut
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|a Photosynthesis might be limited by light, not inorganic carbon availability, in three intertidal Gelidiales species
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|c 2001
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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|a ƒa Online-Ressource
|b cr
|2 rdacarrier
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|a Date Revised 20.04.2021
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|a published: Print
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|a Citation Status PubMed-not-MEDLINE
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|a • The interaction between incident photon fluence density (PFD) and dissolved inorganic carbon (DIC) availability on photosynthesis is reported for three species of Gelidiales (Rhodophyta) from the Canary Islands. • Photosynthetic O2 evolution in response to both DIC concentration and PFD, and external carbonic anhydrase activity were measured in thalli of Gelidium canariensis, Gelidium arbuscula and Pterocladiella capillacea maintained in a controlled-environment room. • No detectable external carbonic anhydrase activity, high sensitivity to alkaline pH and moderate values of photosynthetic conductance for DIC indicated that the three species had a low capacity for using the external pool of HCO3 - ; therefore photosynthetic rates were dependent on CO2 availability. The seawater concentration of DIC was insufficient to saturate photosynthesis at high PFD; photosynthesis vs PFD was not affected by DIC concentration at 0.07-0.04 mol O2 mol-1 photon. ANOVA revealed that incident PFD had a greater effect than DIC availability on photosynthesis rates in G. canariensis. • Photosynthesis is probably limited by incident light rather than DIC concentration despite the apparent low affinity for HCO3 - in G. canariensis, G. arbuscula and P. capillacea in their natural habitats
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| 650 |
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|a Journal Article
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|a Gelidiales
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| 650 |
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4 |
|a carbonic anhydrase
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| 650 |
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|a inorganic carbon
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| 650 |
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4 |
|a intertidal
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| 650 |
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|a macroalgae
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| 650 |
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|a photosynthesis
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| 650 |
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|a quantum yield
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| 700 |
1 |
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|a Xavier Niell, F
|e verfasserin
|4 aut
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|a Candelaria Gil-Rodríguez, M
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t The New phytologist
|d 1979
|g 149(2001), 3 vom: 20. März, Seite 431-439
|w (DE-627)NLM09818248X
|x 1469-8137
|7 nnns
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| 773 |
1 |
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|g volume:149
|g year:2001
|g number:3
|g day:20
|g month:03
|g pages:431-439
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|u http://dx.doi.org/10.1046/j.1469-8137.2001.00050.x
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