Responses of two ecotypes of Medicago ciliaris to direct and bicarbonate-induced iron deficiency conditions
Articolo
Data di Pubblicazione:
2009
Citazione:
Responses of two ecotypes of Medicago ciliaris to direct and bicarbonate-induced iron deficiency conditions / W. M’sehli, M. Dell’Orto, P. De Nisi, S. Donnini, C. Abdelly, G. Zocchi, M. Gharsalli. - In: ACTA PHYSIOLOGIAE PLANTARUM. - ISSN 0137-5881. - 31:4(2009 Jul), pp. 667-673.
Abstract:
Our study investigates the effect of iron deficiency on morpho-physiological and biochemical parameters of two Medicago ciliaris ecotypes (Mateur TN11.11 and Soliman TN8.7). Iron deficiency was imposed by making plants grow, either in an iron free or by the addition of CaCO 3/NaHCO3 to the Hoagland nutrient solution. Our results showed that both true and bicarbonate Fe-deficiency induced the characteristic iron-chlorosis symptoms, although the intensity of the symptoms was ecotype-dependent. This variability in tolerance to iron deficiency was also displayed by other morphological parameters such as root biomass and chlorophyll concentration. Besides, iron chlorosis induced an increase in biochemical parameters: the iron reducing capacity (measured in vivo on root segments and in vitro on plasma membrane enriched vesicles) and rhizosphere acidification by enhancement of H+-ATPase activity were more pronounced in Mateur ecotype. These findings suggest that Soliman ecotype was more sensitive than Mateur one to iron chlorosis.
Tipologia IRIS:
01 - Articolo su periodico
Keywords:
Fe(III)-chelate reductase; H+-ATPase; Iron deficiency; Medicago ciliaris; Variability
Elenco autori:
W. M’sehli, M. Dell’Orto, P. De Nisi, S. Donnini, C. Abdelly, G. Zocchi, M. Gharsalli
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