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Acta Physiologiae PlantarumVolume 35, Issue 4, 2013, Pages 1281-1289

Cadmium toxicity affects photosynthesis and plant growth at different levels(Article)

  • aDepartment of Biology and Centre for Environmental and Marine Studies (CESAM), University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
  • bDepartment of Biology and Environment, Centre for the Research and Technology of Agro-Environmental and Biological Sciences (CITAB), University of Trás-os-Montes e Alto Douro, Apartado 1013, 5001-801 Vila Real, Portugal

Abstract

In this article we discuss and update some of the effects of Cd toxicity on the photosynthetic apparatus in a model crop Lactuca sativa. Seeds of L. sativa were germinated in solutions with 0, 1, 10 and 50 μM of Cd(NO3)2 and then transferred to a hydroponic culture medium. After 28 days, the effects of Cd on the photosynthetic apparatus of lettuce were analysed. Exposure of lettuce to 1 μM Cd(NO3)2 affected already plant growth (dry biomass), but, did not induce serious damages in the photosynthetic apparatus. However, increasing concentrations of this metal to 10 and 50 μM promoted a strong reduction of the maximum photochemical efficiency of PSII and an impairment of net CO2 assimilation rate, putatively due to Rubisco activity decrease. This ultimately results in a strong inhibition of plant growth. Nutrient uptake and carbohydrate assimilation were also severely affected by Cd. © 2012 Franciszek Górski Institute of Plant Physiology, Polish Academy of Sciences, Kraków.

Author keywords

CadmiumNutrientsPhotosynthesisPigmentsRubisco

Indexed keywords

Species Index:LactucaLactuca sativa

Funding details

Funding sponsor Funding number Acronym
FCT/PTDC/AAC-AMB/112804/2009,SFRH/BPD/ 41700/2007,SFRH/BD/ 48204/2008

  • 1

    Acknowledgments This work was supported by the Portuguese Foundation for Science and technology (FCT) FCT/PTDC/AAC-AMB/112804/2009, BioRem: integration of multiple Biomarkers of toxicity in an assay of phytoremediation in contaminated sites. FCT also supported a post-doctoral fellowship of M. C. Dias (SFRH/BPD/ 41700/2007) and the doctoral fellowship of C. Monteiro (SFRH/BD/ 48204/2008).

  • ISSN: 01375881
  • CODEN: APPLD
  • Source Type: Journal
  • Original language: English
  • DOI: 10.1007/s11738-012-1167-8
  • Document Type: Article

  Dias, M. C.; Department of Biology and Centre for Environmental and Marine Studies (CESAM), University of Aveiro, Campus Universitário de Santiago, Portugal;
© Copyright 2013 Elsevier B.V., All rights reserved.

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