biologia plantarum

International journal on Plant Life established by Bohumil Němec in 1959

Biologia plantarum 46:301-304, 2003 | DOI: 10.1023/B:BIOP.0000022271.35778.17

Glutamine Synthetase Activity, Relative Water Content and Water Potential in Maize Submitted to Drought

L.O. Medici1, A.T. Machado1, R.A. Azevedo2, C. Pimentel3
1 Departamento de Ciências Fisiológicas, Km 7, Seropédica CEP, Brasil
2 Departamento de Genética, Escola Superior de Agricultura Luiz de Queiroz, Universidade de São Paulo, Piracicaba CEP, Brasil
3 Embrapa Cerrados, Planaltina CEP, Brasil

Two maize (Zea mays L.) hybrids, BR 201 and P 6875, were submitted to drought by withholding irrigation at the vegetative or reproductive phases. During water deficit, in both phases, the relative water content (RWC) was higher and leaf water potential (Ψw) was lower in the hybrid P 6875 than in the hybrid BR201. This response indicated a better osmotic adjustment capacity of the hybrid P 6875 when compared to BR 201. Glutamine synthetase activity was not affected by drought even at a RWC of 60 % and Ψw of -1.2 MPa or during rehydration.

Keywords: drought tolerance; osmotic adjustment; Zea mays
Subjects: glutamine synthetase; leaf water potential, glutamine synthetase activity; maize, drought stress, glutamine synthetase activity; osmotic adjustment; relative water content, glutamine synthetase activity; resistance/tolerance to drought, water stress; water stress tolerance; Zea mays

Published: September 1, 2003  Show citation

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Medici, L.O., Machado, A.T., Azevedo, R.A., & Pimentel, C. (2003). Glutamine Synthetase Activity, Relative Water Content and Water Potential in Maize Submitted to Drought. Biologia plantarum, 46(2), 301-304. doi: 10.1023/B:BIOP.0000022271.35778.17
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