Physiological Effects of GS Inhibition in Plants

When plants are kept in the light, already 1 h after foliar application of glufosi-nate an increase in free ammonia is measurable. Within 24 h the ammonia level is 100-fold increased, whereas in plants kept in constant darkness, the level of free ammonia is only slightly increased after 24 h [23]. This observation is in agreement with the fact that the vast majority of the released ammonia is generated in the photosynthetic C2 carbon cycle and to a smaller degree by nitrite re- 

3 Modulation of Herbicidal Activity of Clufbsinate by Environmental Conditions 

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