Photosynthetic efficiency in rhizophoracean mangroves with reference to compartmentalization of photosynthetic pigments

Photosynthetic pigments are localized in protein complexes of chloroplast membranes and their role in photosynthesis has long been established but their efficiency has not been measured in many species. The photosynthetic efficiency of four rhizophoracean mangroves, Rhizophora apiculata, R. mucronat...

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Autor principal:	Moorthy, P
Formato:	Online
Idioma:	eng
Publicado:	Universidad de Costa Rica 1999
Acceso en línea:	https://revistas.ucr.ac.cr/index.php/rbt/article/view/18997

id	RBT18997
record_format	ojs
spelling	RBT189972022-05-30T19:16:23Z Photosynthetic efficiency in rhizophoracean mangroves with reference to compartmentalization of photosynthetic pigments Photosynthetic efficiency in rhizophoracean mangroves with reference to compartmentalization of photosynthetic pigments Moorthy, P chlorophylls mangroves photosynthesis rhizophoraceae Photosynthetic pigments are localized in protein complexes of chloroplast membranes and their role in photosynthesis has long been established but their efficiency has not been measured in many species. The photosynthetic efficiency of four rhizophoracean mangroves, Rhizophora apiculata, R. mucronata, Bruguiera cylindrica and Ceriops decandra was studied in randomly collected propagules from Pichavaram mangrove forest (southeast coast of India) by estimating the concentration of photosynthetic pigments in protein complexes of the thylakoid membrane. Reaction centre chlorophyll (RC-chl) was maximum in B. cylindrica and minimum in R. mucronata. Of the total amount of chlorophylls, RC-chl constitutes about 50%. The light harvesting complex chlorophyll (LHC-chl) was highest in C. decandra and lowest in R. mucronata. Net photosynthesis was found to be higher in B. cylindrica and lower in R. mucronata with the respective CO2 fixation of 20.52 and 10.83 μmol m-2s-1. A positive correlation was obtained between RC-chl and net photosynthesis. The stomatal conductance to CO2 influx was also found to be high and low in B. cylindrica and R. mucronata respectively. We refer the chlorophylls present in the reaction centre and light harvesting complex as “ membrane bound chlorophyll” and propose to use this as an index for measuring the productivity of mangrove species Photosynthetic pigments are localized in protein complexes of chloroplast membranes and their role in photosynthesis has long been established but their efficiency has not been measured in many species. The photosynthetic efficiency of four rhizophoracean mangroves, Rhizophora apiculata, R. mucronata, Bruguiera cylindrica and Ceriops decandra was studied in randomly collected propagules from Pichavaram mangrove forest (southeast coast of India) by estimating the concentration of photosynthetic pigments in protein complexes of the thylakoid membrane. Reaction centre chlorophyll (RC-chl) was maximum in B. cylindrica and minimum in R. mucronata. Of the total amount of chlorophylls, RC-chl constitutes about 50%. The light harvesting complex chlorophyll (LHC-chl) was highest in C. decandra and lowest in R. mucronata. Net photosynthesis was found to be higher in B. cylindrica and lower in R. mucronata with the respective CO2 fixation of 20.52 and 10.83 μmol m-2s-1. A positive correlation was obtained between RC-chl and net photosynthesis. The stomatal conductance to CO2 influx was also found to be high and low in B. cylindrica and R. mucronata respectively. We refer the chlorophylls present in the reaction centre and light harvesting complex as “ membrane bound chlorophyll” and propose to use this as an index for measuring the productivity of mangrove species Universidad de Costa Rica 1999-03-01 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Article application/pdf https://revistas.ucr.ac.cr/index.php/rbt/article/view/18997 10.15517/rbt.v47i1-2.18997 Revista de Biología Tropical; Vol. 47 No. 1-2 (1999): Volume 47 – Regular number 1-2 – March 1999; 21–25 Revista de Biología Tropical; Vol. 47 Núm. 1-2 (1999): Volumen 47 – Número regular 1-2 – Marzo 1999; 21–25 Revista Biología Tropical; Vol. 47 N.º 1-2 (1999): Volume 47 – Regular number 1-2 – March 1999; 21–25 2215-2075 0034-7744 10.15517/rbt.v47i1-2 eng https://revistas.ucr.ac.cr/index.php/rbt/article/view/18997/19092 Copyright (c) 1999 Revista de Biología Tropical http://creativecommons.org/licenses/by/4.0
institution	Universidad de Costa Rica
collection	Revista de Biología Tropical
language	eng
format	Online
author	Moorthy, P
spellingShingle	Moorthy, P Photosynthetic efficiency in rhizophoracean mangroves with reference to compartmentalization of photosynthetic pigments
author_facet	Moorthy, P
author_sort	Moorthy, P
description	Photosynthetic pigments are localized in protein complexes of chloroplast membranes and their role in photosynthesis has long been established but their efficiency has not been measured in many species. The photosynthetic efficiency of four rhizophoracean mangroves, Rhizophora apiculata, R. mucronata, Bruguiera cylindrica and Ceriops decandra was studied in randomly collected propagules from Pichavaram mangrove forest (southeast coast of India) by estimating the concentration of photosynthetic pigments in protein complexes of the thylakoid membrane. Reaction centre chlorophyll (RC-chl) was maximum in B. cylindrica and minimum in R. mucronata. Of the total amount of chlorophylls, RC-chl constitutes about 50%. The light harvesting complex chlorophyll (LHC-chl) was highest in C. decandra and lowest in R. mucronata. Net photosynthesis was found to be higher in B. cylindrica and lower in R. mucronata with the respective CO2 fixation of 20.52 and 10.83 μmol m-2s-1. A positive correlation was obtained between RC-chl and net photosynthesis. The stomatal conductance to CO2 influx was also found to be high and low in B. cylindrica and R. mucronata respectively. We refer the chlorophylls present in the reaction centre and light harvesting complex as “ membrane bound chlorophyll” and propose to use this as an index for measuring the productivity of mangrove species
title	Photosynthetic efficiency in rhizophoracean mangroves with reference to compartmentalization of photosynthetic pigments
title_short	Photosynthetic efficiency in rhizophoracean mangroves with reference to compartmentalization of photosynthetic pigments
title_full	Photosynthetic efficiency in rhizophoracean mangroves with reference to compartmentalization of photosynthetic pigments
title_fullStr	Photosynthetic efficiency in rhizophoracean mangroves with reference to compartmentalization of photosynthetic pigments
title_full_unstemmed	Photosynthetic efficiency in rhizophoracean mangroves with reference to compartmentalization of photosynthetic pigments
title_sort	photosynthetic efficiency in rhizophoracean mangroves with reference to compartmentalization of photosynthetic pigments
title_alt	Photosynthetic efficiency in rhizophoracean mangroves with reference to compartmentalization of photosynthetic pigments
publisher	Universidad de Costa Rica
publishDate	1999
url	https://revistas.ucr.ac.cr/index.php/rbt/article/view/18997
work_keys_str_mv	AT moorthyp photosyntheticefficiencyinrhizophoraceanmangroveswithreferencetocompartmentalizationofphotosyntheticpigments
_version_	1810114770197544960

Photosynthetic efficiency in rhizophoracean mangroves with reference to compartmentalization of photosynthetic pigments

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