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Journal of Experimental Botany, Vol. 51, No. 351, pp. 1763-1764, October 2000
© 2000 Oxford University Press

Gene Note

Oxidative stress, heat shock and drought differentially affect expression of a tobacco protein phosphatase 2C1

Eva Vranová2,4, Christian Langebartels3, Marc Van Montagu2, Dirk Inzé2,6 and Wim Van Camp2,5

2 Vakgroep Moleculaire Genetica and Departement Plantengenetica, Vlaams Interuniversitair Instituut voor Biotechnologie (VIB), Universiteit Gent, K.L. Ledeganckstraat 35, B-9000 Gent, Belgium
3 GSF-Forschungszentrum für Umwelt und Gesundheit, Institut für Biochemische Pflanzenpathologie, D-85764 Neuherberg, Germany

Abstract

A protein phosphatase 2C (PP2C)-homologous cDNA was isolated from Nicotiana tabacum (NtPP2C1). The deduced protein sequence of 416 amino acids showed the highest degree of similarity to the PP2C of Arabidopsis thaliana (AtPP2CA) implicated in abscisic acid signalling. The expression of NtPP2C1 was strongly induced by drought, but repressed by oxidative stress and heat shock. It is suggested that NtPP2C1 operates at the junction of drought, heat shock and oxidative stress.

Key words: Drought, heat shock, Nicotiana, oxidative stress, PP2C.


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