Photosynthetic pigment concentration, gas exchange and vegetative growth of selected monocots and dicots treated with contrasting coal fly ashes

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dc.contributor.author Desilva Lionel en_US
dc.contributor.author Eamus Derek en_US
dc.contributor.author Yunusa Isa en_US
dc.contributor.author Burchett Margaret en_US
dc.contributor.author Skilbeck Charles en_US
dc.contributor.author Veeragathipillai Manoharan en_US
dc.contributor.editor en_US
dc.date.accessioned 2010-05-28T09:43:59Z
dc.date.available 2010-05-28T09:43:59Z
dc.date.issued 2009 en_US
dc.identifier 2008003914 en_US
dc.identifier.citation Desilva Lionel et al. 2009, 'Photosynthetic pigment concentration, gas exchange and vegetative growth of selected monocots and dicots treated with contrasting coal fly ashes', American Society for Agronomy, vol. 38, pp. 1466-1472. en_US
dc.identifier.issn 00472425 en_US
dc.identifier.other C1 en_US
dc.identifier.uri http://hdl.handle.net/10453/8554
dc.description.abstract Received for publication June 24, 2008. There is uncertainty as to the rates of coal fly ash needed for optimum physiological processes and growth. In the current study we tested the hypothesis that photosynthetic pigments concentrations and CO2 assimilation (A) are more sensitive than dry weights in plants grown on media amended with coal fly ash. We applied the Terrestrial Plant Growth Test (Guideline 208) protocols of the Organization for Economic Cooperation and Development (OECD) to monocots [barley (Hordeum vulgare) and ryegrass (Secale cereale)] and dicots [canola (Brasica napus), radish (Raphanus sativus), field peas (Pisum sativum), and lucerne (Medicago sativa)] on media amended with fly ashes derived from semi-bituminous (gray ash) or lignite (red ash) coals at rates of 0, 2.5, 5.0, 10, or 20 Mg ha¿1. The red ash had higher elemental concentrations and salinity than the gray ash. Fly ash addition had no significant effect on germination by any of the six species. At moderate rates (? 10 Mg ha¿1) both ashes increased (p < 0.05) growth rates and concentrations of chlorophylls a and b, but reduced carotenoid concentrations. Addition of either ash increased A in radish and transpiration in barley. Growth rates and final dry weights were reduced for all of the six test species when addition rates exceeded 10 Mg ha¿1 for gray ash and 5 Mg ha¿1 for red ash. We concluded that plant dry weights, rather than pigment concentrations and/or instantaneous rates of photosynthesis, are more consistent for assessing subsequent growth in plants supplied with fly ash. en_US
dc.language en_US
dc.publisher American Society for Agronomy en_US
dc.relation.isbasedon http://dx.doi.org/10.2134/jeq2008.0285 en_US
dc.title Photosynthetic pigment concentration, gas exchange and vegetative growth of selected monocots and dicots treated with contrasting coal fly ashes en_US
dc.parent Journal of Environmental Quality en_US
dc.journal.volume 38 en_US
dc.journal.number en_US
dc.publocation USA en_US
dc.identifier.startpage 1466 en_US
dc.identifier.endpage 1472 en_US
dc.cauo.name SCI.Environmental Sciences en_US
dc.conference Verified OK en_US
dc.for 050205 en_US
dc.personcode 0000045820;000006;030005;101663;870360;995955 en_US
dc.percentage 000100 en_US
dc.classification.name Environmental Management en_US
dc.classification.type FOR-08 en_US
dc.edition en_US
dc.custom en_US
dc.date.activity en_US
dc.location.activity en_US
dc.description.keywords coal fly ash, CO2 assimilation, growth rates, photosynthetic pigments, salinity, trace elements en_US
dc.staffid en_US


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