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Title

Cadmium-stress in white lupin: effects on nodule structure and functioning

AuthorsCarpena-Ruiz, Ramón O.; Vázquez, Saúl; Esteban, Elvira; Fernández-Pascual, Mercedes CSIC ; Felipe, Mª Rosario de; Zornoza, P.
KeywordsCadmium stress
Glycoprotein
Leghemoglobin
Lupinus albus
Nodule metabolites
Nodule structure
Stress indicators
Issue Date2003
PublisherElsevier
CitationPlant Physiology and Biochemistry 41: 911-919 /2003)
AbstractCadmium effects on nodule structure and changes in organic and amino acids, proteins, nutrients and some stress indicators were studied in nodules of white lupin (Lupinus albus L., cv.Multolupa). Plants were grown hydroponically on perlite for 49 d with (18 μM) or without Cd in the nutrient solution. Cadmium-treated plants showed decreases in leaf chlorophyll and shoot sucrose concentrations, but sucrose did not change in nodules. Cadmium application produced alterations in nodule cortex and infected zone structure. Furthermore, Cd supply caused a marked decrease in P, K, leghemoglobin, N–amino compounds, malate, succinate and soluble protein in the nodules. Conversely, the levels of lipid peroxidation and total thiols increased strongly. Results obtained suggest that white lupin nodules are Cd sensitive, in spite of Cd sequestering by cell walls and thiols. The main phytotoxic effects of Cd on nodule structure and function were the occlusion with glycoprotein of intracellular spaces of nodule cortex, alterations in symbiosomes, enrichment in Cd of cell walls and oxidative stress. Glycoprotein accumulation and leghemoglobin depletion may be considered useful indicators of Cd stress in white lupin nodules.
Description10 pages, figures, and tables statistics.
Publisher version (URL)http://dx.doi.org/10.1016/S0981-9428(03)00136-0
URIhttp://hdl.handle.net/10261/29035
DOI10.1016/S0981-9428(03)00136-0
ISSN0981-9428
Appears in Collections:(ICA) Artículos

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