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Abiotic stresses affecting water balance induce phosphoenolpyruvate carboxylase expression in roots of wheat seedlings

González, María-Cruz ; Sánchez, Rosario ; Cejudo, Francisco J.

Planta, 2003-04, Vol.216 (6), p.985-992 [Periódico revisado por pares]

Berlin: Springer-Verlag

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Abiotic stresses affecting water balance induce phosphoenolpyruvate carboxylase expression in roots of wheat seedlings
Autor: González, María-Cruz ; Sánchez, Rosario ; Cejudo, Francisco J.
Assuntos: Biological and medical sciences ; Cold Temperature ; Crassulacean acid metabolism ; Drought ; Enzymes ; Fundamental and applied biological sciences. Psychology ; Gene Expression Regulation, Enzymologic - drug effects ; Gene Expression Regulation, Plant - drug effects ; Hypoxia ; Lithium Chloride - pharmacology ; Metabolism ; Organic acids ; Phosphoenolpyruvate Carboxylase - genetics ; Phosphoenolpyruvate Carboxylase - metabolism ; Photosynthesis, respiration. Anabolism, catabolism ; Plant physiology and development ; Plant roots ; Plant Roots - drug effects ; Plant Roots - enzymology ; Plant Roots - genetics ; Plant Roots - metabolism ; Plant Shoots - drug effects ; Plant Shoots - enzymology ; Plant Shoots - genetics ; Plant Shoots - metabolism ; Plants ; RNA ; Root meristems ; Seedlings ; Seedlings - drug effects ; Seedlings - enzymology ; Seedlings - genetics ; Seedlings - metabolism ; Sodium Chloride - pharmacology ; Triticum - drug effects ; Triticum - enzymology ; Triticum - genetics ; Triticum - metabolism ; Water - metabolism
É parte de: Planta, 2003-04, Vol.216 (6), p.985-992
Notas: ObjectType-Article-1
SourceType-Scholarly Journals-1
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Descrição: Phosphoenolpyruvate carboxylase (PEPC, EC 4.1.1.31) plays an important role in CO2 fixation in C4 and CAM plants. In C3 plants, PEPC is widely expressed in most organs; however, its function is not yet clearly established. With the aim of providing clues on the function of PEPC in C3 plants, we have analyzed its pattern of expression in wheat (Triticum aestivum L.) seedlings. Roots showed almost double the level of PEPC activity of shoots. Further analysis of PEPC expression in roots by in situ localization techniques showed a high accumulation of PEPC transcripts and polypeptides in meristematic cells, whereas in the rest of the root PEPC localized preferentially to the vascular tissue. Treatment with NaCl and LiCl induced PEPC expression in roots. Similarly, other abiotic stresses affecting water status, such as drought or cold, induced PEPC expression. Induction was root-specific except for the cold treatment, which also induced PEPC in shoots, although to a lesser extent. In contrast, hypoxia, which does not affect water balance, did not promote any induction of PEPC expression. These results suggest an important role for this enzyme in the adaptation of plants to environmental changes.
Editor: Berlin: Springer-Verlag
Idioma: Inglês

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Abiotic stresses affecting water balance induce phosphoenolpyruvate carboxylase expression in roots of wheat seedlings

González, María-Cruz ; Sánchez, Rosario ; Cejudo, Francisco J.

Berlin: Springer-Verlag

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