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Characterization of the responses of cork oak (Quercus suber) to iron deficiency

AutorGogorcena Aoiz, Yolanda ; Molias, Nuria; Larbi, Ajmi ; Abadía Bayona, Javier ; Abadía Bayona, Anunciación
Palabras claveRhizosphere acidification
Plant nutrition
Ferric chelate reductase
Fe deficiency
Fecha de publicacióndic-2001
EditorHeron Publishing
CitaciónTree Physiology 21 (18): 1335-1340 (2001)
ResumenWe studied responses of cork oak (Quercus suber L.) to iron (Fe) deficiency by comparing seedlings grown hydroponically in nutrient solution with and without Fe. Seedlings grown without Fe developed some responses typical of the Strategy I group of Fe-efficient plants, including two- and fourfold increases in plasma membrane ferric chelate reductase activity of root tips after 2 and 4 weeks of culture in the absence of Fe, respectively. Moreover, seedlings grown hydroponically for 2 weeks without Fe caused marked decreases in the pH of the nutrient solution, indicating that root plasma membrane ATPase activity was induced by Fe deficiency. Iron deficiency also caused marked decreases in leaf chlorophyll and carotenoid concentrations, and chlorophyll concentrations were decreased more than carotenoid concentrations. Iron deficiency resulted in an 8% decrease in the dark-adapted efficiency of photosystem II and a 43% decrease in efficiency of photosystem II at steady-state photosynthesis. No major root morphological changes were observed in seedlings grown without Fe, although seedlings grown in Fe-deficient nutrient solution had light-colored roots in contrast to the dark brown color of control roots.
Versión del editorhttp://dx.doi.org/10.1093/treephys/21.18.1335
URIhttp://hdl.handle.net/10261/99913
DOI10.1093/treephys/21.18.1335
Identificadoresdoi: 10.1093/treephys/21.18.1335
issn: 0829-318X
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