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http://hdl.handle.net/10773/23794
Title: | Cadmium toxicity affects photosynthesis and plant growth at different levels |
Author: | Dias, Maria Celeste Monteiro, Cristina Moutinho-Pereira, José Correia, Carlos Gonçalves, Berta Santos, Conceição |
Keywords: | Cadmium Nutrients Photosynthesis Pigments Rubisco |
Issue Date: | 2013 |
Publisher: | Springer |
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. |
Peer review: | yes |
URI: | http://hdl.handle.net/10773/23794 |
DOI: | 10.1007/s11738-012-1167-8 |
ISSN: | 0137-5881 |
Appears in Collections: | CESAM - Artigos DBio - Artigos |
Files in This Item:
File | Description | Size | Format | |
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Dias et al. - 2013 - Cadmium toxicity affects photosynthesis and plant .pdf | 385.83 kB | Adobe PDF |
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