Glutamine synthetase activity, relative water content and water potential in maize submitted to drought
2003
Medici, L.O. | Machado, A.T. | Azevedo, R.A. (Universidade de Sao Paulo (Brasil)) | Pimentel, C.
Two maize 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 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 than the hybrid BR 201. Glutamine synthetase activity was not affected by drought even at a RWC of 60 % and leaf water potential of -1.2 MPa or during rehydration.
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