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Costs and benefits of carnivory in plants: insights from the photosynthetic performance of four carnivorous plants in a subarctic environment

dc.contributor.authorMéndez, M.
dc.contributor.authorKarlsson, P. S.
dc.description.abstractWe measured photosynthetic performance in four subarctic carnivorous plants, Pinguicula alpina, P. villosa, P. vulgaris and Drosera rotundifolia, in order to test if there is a cost of combining photosynthetic and trapping devices into the same organ (leaves). We compared these data with published results on photosynthetic rates in subarctic non-carnivorous plants. In P. vulgaris, an experiment of prey addition and removal further tested the existence of a short-term benefit of increased nutrient gain from prey in terms of photosynthetic efficiency. Leaf area-based photosynthetic rates (Pa) ranged 2.0 - 3.0 µmol CO2 m-2 s-1, dry mass-based photosynthetic rates (Pw) 42 - 69 nmol CO2 g-1 s-1, and photosynthetic nitrogen use efficiency (PNUE) 29 - 45 µmol CO2 mol N-1 s-1. In general, Pa and Pw of carnivorous plants increased with leaf nitrogen content. When each species was analysed separately, those relationships were weak (P. alpina and P. villosa) or non-significant (P. vulgaris and D. rotundifolia). The photosynthetic rate of carnivorous plants was lower than that of other subarctic growth forms. In addition, Pw for a given leaf nitrogen content was significantly lower in carnivorous plants than in non-carnivorous ones. No change in Pa, Pw or PNUE occurred as a result of prey capture manipulation, but treatments differed only slightly in nutrient content. Pw and PNUE showed a trend to be higher in reproductive P. alpina plants as compared to vegetative ones. In P. vulgaris, however, an increased leaf respiration was found in reproductive
dc.rightsAtribución-NoComercial-SinDerivadas 3.0 España*
dc.subjectcarnivorous plantses
dc.subjectnutrient-use efficiencyes
dc.titleCosts and benefits of carnivory in plants: insights from the photosynthetic performance of four carnivorous plants in a subarctic environmentes
dc.subject.unesco2302.25 Fotosíntesises
dc.subject.unesco2415.02 Biología Molecular de Plantases
dc.description.departamentoBiología y Geología

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Atribución-NoComercial-SinDerivadas 3.0 EspañaExcept where otherwise noted, this item's license is described as Atribución-NoComercial-SinDerivadas 3.0 España