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Proline synthesis in barley under iron deficiency and salinity

Arias-Baldrich, Cirenia ; Bosch, Nadja ; Begines, Digna ; Feria, Ana B. ; Monreal, José A. ; García-Mauriño, Sofía

Journal of plant physiology, 2015-07, Vol.183, p.121-129 [Periódico revisado por pares]

Germany: Elsevier GmbH

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Título:
Proline synthesis in barley under iron deficiency and salinity
Autor: Arias-Baldrich, Cirenia ; Bosch, Nadja ; Begines, Digna ; Feria, Ana B. ; Monreal, José A. ; García-Mauriño, Sofía
Assuntos: Barley ; Fe deficiency ; Hordeum - drug effects ; Hordeum - enzymology ; Hordeum - genetics ; Hordeum - physiology ; Iron - deficiency ; Phosphoenolpyruvate carboxylase ; Phosphoenolpyruvate Carboxylase - genetics ; Phosphoenolpyruvate Carboxylase - metabolism ; Plant Leaves - drug effects ; Plant Leaves - metabolism ; Plant Proteins - genetics ; Plant Proteins - metabolism ; Proline ; Proline - metabolism ; Salinity ; Sodium Chloride - pharmacology ; Stress, Physiological
É parte de: Journal of plant physiology, 2015-07, Vol.183, p.121-129
Notas: ObjectType-Article-1
SourceType-Scholarly Journals-1
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Descrição: This work investigates proline synthesis in six barley varieties subjected to iron deficiency, salinity or both stresses. The highest growth under Fe sufficiency corresponded to Belgrano and Shakira. A moderate augment of leaf phosphoenolpyruvate carboxylase (PEPC) activity was observed in all six varieties in response to Fe deficiency, consistently in leaves and sporadically in roots. All six varieties accumulated proline under Fe deficiency, to a higher extent in leaves than in roots. The decrease of Fe supply from 100μM NaFe(III)-EDTA to 0.5μM NaFe(III)-EDTA reduced growth and photosynthetic pigments similarly in the six barley varieties. On the contrary, differences between varieties could be observed with respect to increased or, conversely, decreased proline content as a function of the amount of NaFe(III)-EDTA supplied. These two opposite types were represented by Belgrano (higher proline under Fe deficiency) and Shakira (higher proline under Fe sufficiency). Time-course experiments suggested that leaf PEPC activity was not directly responsible for supplying C for proline synthesis under Fe deficiency. High proline levels in the leaves of Fe-deficient Belgrano plants in salinity were associated to a better performance of this variety under these combined stresses.
Editor: Germany: Elsevier GmbH
Idioma: Inglês

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Proline synthesis in barley under iron deficiency and salinity

Arias-Baldrich, Cirenia ; Bosch, Nadja ; Begines, Digna ; Feria, Ana B. ; Monreal, José A. ; García-Mauriño, Sofía

Germany: Elsevier GmbH

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