Variation in leaf attributes and their effects on physiological processes in Leucospermum conocarpodendron L. Buek

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dc.contributor.advisorMidgley, Jeremy Jen_ZA
dc.contributor.authorSkelton, Roberten_ZA
dc.date.accessioned2017-10-11T10:55:31Z
dc.date.available2017-10-11T10:55:31Z
dc.date.issued2007en_ZA
dc.date.updated2017-02-07T13:50:20Z
dc.description.abstractTwo subspecies of Leucospermum conocarpodendron with considerable variation in leaf traits occur along the Cape Peninsula along clearly delimited geographical distributions. We attempted to quantify the difference in leaf trait dimensions between green (L. conocarpodendron ssp. viridum) and grey (L. conocarpodendron ssp. conocarpodendron) individuals. Leaves from grey individuals are shown to have higher reflectance across the entire photosynthetically active region (PAR) and greater stomatal density. Leaves from grey individuals were found to have higher specific leaf area (SLA] and a greater size boundary layer. We found no correlation between the transpiration rate and stomatal density, size of the boundary layer and hairiness. We hypothesize that the leaf traits are having an effect on rate of photosynthesis and subsequently determining growth strategy of each type. Grey individuals, because of increased reflectance from the leaves are able to persist throughout summer in hot, dry conditions, although they may suffer the cost of reduced photosynthetic rate during late winter and early summer when conditions are relatively mild. Green individuals are able to start growing earlier due to higher SLA and increased rate of photosynthesis but are not able to persist for as long as the grey individuals during mid to late summer. Finally we argue that adaptation to edaphic environment may be associated with subsequent shifts in flowering phenology.en_ZA
dc.identifier.apacitationSkelton, R. (2007). <i>Variation in leaf attributes and their effects on physiological processes in Leucospermum conocarpodendron L. Buek</i>. (Thesis). University of Cape Town ,Faculty of Science ,Department of Biological Sciences. Retrieved from http://hdl.handle.net/11427/25579en_ZA
dc.identifier.chicagocitationSkelton, Robert. <i>"Variation in leaf attributes and their effects on physiological processes in Leucospermum conocarpodendron L. Buek."</i> Thesis., University of Cape Town ,Faculty of Science ,Department of Biological Sciences, 2007. http://hdl.handle.net/11427/25579en_ZA
dc.identifier.citationSkelton, R. 2007. Variation in leaf attributes and their effects on physiological processes in Leucospermum conocarpodendron L. Buek. University of Cape Town.en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Skelton, Robert AB - Two subspecies of Leucospermum conocarpodendron with considerable variation in leaf traits occur along the Cape Peninsula along clearly delimited geographical distributions. We attempted to quantify the difference in leaf trait dimensions between green (L. conocarpodendron ssp. viridum) and grey (L. conocarpodendron ssp. conocarpodendron) individuals. Leaves from grey individuals are shown to have higher reflectance across the entire photosynthetically active region (PAR) and greater stomatal density. Leaves from grey individuals were found to have higher specific leaf area (SLA] and a greater size boundary layer. We found no correlation between the transpiration rate and stomatal density, size of the boundary layer and hairiness. We hypothesize that the leaf traits are having an effect on rate of photosynthesis and subsequently determining growth strategy of each type. Grey individuals, because of increased reflectance from the leaves are able to persist throughout summer in hot, dry conditions, although they may suffer the cost of reduced photosynthetic rate during late winter and early summer when conditions are relatively mild. Green individuals are able to start growing earlier due to higher SLA and increased rate of photosynthesis but are not able to persist for as long as the grey individuals during mid to late summer. Finally we argue that adaptation to edaphic environment may be associated with subsequent shifts in flowering phenology. DA - 2007 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 2007 T1 - Variation in leaf attributes and their effects on physiological processes in Leucospermum conocarpodendron L. Buek TI - Variation in leaf attributes and their effects on physiological processes in Leucospermum conocarpodendron L. Buek UR - http://hdl.handle.net/11427/25579 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/25579
dc.identifier.vancouvercitationSkelton R. Variation in leaf attributes and their effects on physiological processes in Leucospermum conocarpodendron L. Buek. [Thesis]. University of Cape Town ,Faculty of Science ,Department of Biological Sciences, 2007 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/25579en_ZA
dc.language.isoengen_ZA
dc.publisher.departmentDepartment of Biological Sciencesen_ZA
dc.publisher.facultyFaculty of Scienceen_ZA
dc.publisher.institutionUniversity of Cape Town
dc.subject.otherBotanyen_ZA
dc.subject.otherEcologyen_ZA
dc.titleVariation in leaf attributes and their effects on physiological processes in Leucospermum conocarpodendron L. Bueken_ZA
dc.typeBachelor Thesis
dc.type.qualificationlevelHonours
dc.type.qualificationnameBSc (Hons)en_ZA
uct.type.filetype
uct.type.filetypeText
uct.type.filetypeImage
uct.type.publicationResearchen_ZA
uct.type.resourceThesisen_ZA
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