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dc.contributor.author Mantlana, K.
dc.contributor.author Veenendaal, E.
dc.contributor.author Arneth, A.
dc.contributor.author Grispen, V.
dc.contributor.author Bonyongo, C.
dc.contributor.author Heitkonig, I.
dc.contributor.author Lloyd, J.
dc.date.accessioned 2011-08-18T07:55:42Z
dc.date.available 2011-08-18T07:55:42Z
dc.date.issued 2009-08
dc.identifier.citation Mantlana, K. et al (2008) Biomass and leaf-level gas exchange characteristics of three African savanna C4 grass species under optimum growth condition, African Journal of Ecology, Vol. 47, No. 4, pp. 482-489 en_US
dc.identifier.other doi: 10.1111/j.1365-2028.2008.00961.x
dc.identifier.uri http://hdl.handle.net/10311/872
dc.description Some mathematical formulas in the title and abstract may not appear as they are in the original article en_US
dc.description.abstract C4 savanna grass species, Digitaria eriantha, Eragrostis lehmanniana and Panicum repens, were grown under optimum growth conditions with the aim of characterizing their above- and below-ground biomass allocation and the response of their gas exchange to changes in light intensity, CO2 concentration and leaf-to-air vapour pressure deficit gradient (Dl). Digitaria eriantha showed the largest above- and below-ground biomass, high efficiency in carbon gain under light-limiting conditions, high water use efficiency (WUE) and strong stomatal sensitivity to Dl (P = 0.002; r2 = 0.5). Panicum repens had a high aboveground biomass and attained high light saturated photosynthetic rates (Asat, 47 μmol m−2 s−1), stomatal conductance, (gsat, 0.25 mol m−2 s−1) at relatively high WUE. Eragrostis lehmanniana had almost half the biomass of other species, and had similar Asat and gsat but were attained at lower WUE than the other species. This species also showed the weakest stomatal response to Dl (P = 0.19, r2 = 0. 1). The potential ecological significance of the contrasting patterns of biomass allocation and variations in gas exchange parameters among the species are discussed. en_US
dc.language.iso en en_US
dc.publisher Blackwell, www.blackwell.co.uk en_US
dc.subject Panicum repens en_US
dc.subject Okavango Delta en_US
dc.subject Digitaria eriantha en_US
dc.subject Eragrostis lehmanniana en_US
dc.subject Gas exchange characteristics en_US
dc.subject Leaf to air vapour pressure deficit en_US
dc.title Biomass and leaf-level gas exchange characteristics of three African savanna C4 grass species under optimum growth conditions en_US
dc.type Published Article en_US
dc.link http://onlinelibrary.wiley.com/doi/10.1111/j.1365-2028.2008.00961.x/pdf en_US


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