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Effect of electrical conductivity of nutrient solution on glutathione reductase activity, photosynthesis, and transpiration in lettuce (Lactuca sativa)



Effect of electrical conductivity of nutrient solution on glutathione reductase activity, photosynthesis, and transpiration in lettuce (Lactuca sativa)



Journal of the Korean Society for Horticultural Science 44(2): 142-145



Seedlings of lettuce cultivars Grand Rapids and Omega were grown in a nutrient solution with electrical conductivity values of 1.5, 4.5 and 9.0 dS/m. Glutathione reductase (GR) activity was highest at 4.5 and 9.0 dS/m. The greatest increase in GR activity, evident at 21 days after treatment, was observed at 9.0 dS/m for Omega and at 4.5 dS/m for Grand Rapids (11- and 8-fold higher, respectively, than the control). Photosynthesis was reduced only at 9.0 dS/m.

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