Please use this identifier to cite or link to this item: https://doi.org/10.1016/S0168-9452(00)00336-8
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dc.titlePhotosynthesis and antioxidant enzymes of phyllodes of Acacia mangium
dc.contributor.authorYu, H.
dc.contributor.authorOng, B.-L.
dc.date.accessioned2014-10-27T08:36:37Z
dc.date.available2014-10-27T08:36:37Z
dc.date.issued2000-10-08
dc.identifier.citationYu, H., Ong, B.-L. (2000-10-08). Photosynthesis and antioxidant enzymes of phyllodes of Acacia mangium. Plant Science 159 (1) : 107-115. ScholarBank@NUS Repository. https://doi.org/10.1016/S0168-9452(00)00336-8
dc.identifier.issn01689452
dc.identifier.urihttp://scholarbank.nus.edu.sg/handle/10635/101383
dc.description.abstractPhysiological processes are influenced by environmental factors and plant characteristics. The distribution of photosynthetic capacity of phyllodes of Acacia mangium Willd. seedlings was studied in relation to the in vivo photosystem II (PSII) function, photosynthetic gas exchange, chlorophyll fluorescence and activities of antioxidant enzymes (superoxide dismutase (SOD) and ascorbate peroxidase (APX)) of phyllodes at different positions on seedlings. There was a vertical gradient in photosynthetic capacity of phyllodes along the shoot. Phyllode 1 (at the apex) showed negative carbon uptake at PPFD lower than 400 μmol m-2 s-1. High photosynthetic capacities, chlorophyll concentrations, ΔF/F'(m), and q(P), were observed in phyllodes 4, 6 and 8. The high photosynthetic capacities of mature phyllodes could be attributed to the enhanced availability of CO2 and the high efficiency of PSII in energy absorption and utilization. Total SOD and APX activities (on a dry weight basis) were highest at phyllode 1 and decreased as the phyllodes matured. The high photosynthetic capacity and low respiration loss in mature phyllodes could be important factors, responsible for the rapid establishment and fast growth of A. mangium in reforestation programs. (C) 2000 Elsevier Science Ireland Ltd.
dc.description.urihttp://libproxy1.nus.edu.sg/login?url=http://dx.doi.org/10.1016/S0168-9452(00)00336-8
dc.sourceScopus
dc.subjectAcacia mangium
dc.subjectAscorbate peroxidase
dc.subjectChlorophyll fluorescence
dc.subjectPhotosynthesis
dc.subjectPhyllode position
dc.subjectSuperoxide dismutase
dc.typeArticle
dc.contributor.departmentBIOLOGICAL SCIENCES
dc.description.doi10.1016/S0168-9452(00)00336-8
dc.description.sourcetitlePlant Science
dc.description.volume159
dc.description.issue1
dc.description.page107-115
dc.description.codenPLSCE
dc.identifier.isiut000089698600012
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