Glyoxalase I activity in two lines of corn (Zea mays) with different sensitivity to cold stress

The distribution and variation of glyoxalase I activity has been investigat ed in two lines of maize (Zea mays) characterized by different sensitivity to low temperature. Results indicate that: i) in both lines studied leaves display the highest values of enzymatic activity; ii) glyoxalase I activity variation correlates with the capability of treated plants to substain col d stress. The possible link between altered energy requirements and increas e of glyoxalase I activity in resistant plants is discussed.