ORIGINAL ARTICLE
Decrease of the herbicide fenoxaprop phytotoxicity in drought conditions: the role of the antioxidant enzymatic system
			
	
 
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				Department of Physiology of Herbicide Action, Institute of Plant Physiology and Genetics of National Academy of Sciences of the Ukraine, Vasylkivska Str. 31/17, Kyiv, UA-03022, Ukraine
				 
			 
										
				
				
		
		 
			
			
		
		
		
		
		
		
	
							
										    		
    			 
    			
    				    					Corresponding author
    					    				    				
    					Anna Mykhailivna Sychuk 
    					Department of Physiology of Herbicide Action, Institute of Plant Physiology and Genetics of National Academy of Sciences of the Ukraine, Vasylkivska Str. 31/17, Kyiv, UA-03022, Ukraine
    				
 
    			
				 
    			 
    		 		
			
												 
		
	 
		
 
 
Journal of Plant Protection Research 2014;54(4):390-394
		
 
 
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ABSTRACT
This study investigated the effects of the herbicide from the graminicide group fenoxaprop, on oat plants under a normal and  reduced  water  supply.  The  study  was  done  in  vegetative  experimental  conditions.  It  was  established,  that  plants  treated  with fenoxaprop after 2 days following a reduction of the water content in soil with 60% to 40% of full field moisture capacity, significantly reduced phytotoxic action. At the decreased level of water supply in the oat plants, activity of antioxidant enzymes – superoxide dismutase, and catalase increased. The fenoxaprop action did not lead to a substantial increase in superoxide anion radical and hydrogen peroxide content, which had been observed under the action of the herbicide when normal levels of water were supplied to the plants. It was concluded, that the phytotoxic action of the herbicides from the graminicide group mediated the formation of reactive oxygen species and reduction of phytotoxicity on the background effect on plants of various stressors. This reaction was due to the increased activity of antioxidant enzymes, associated with nonspecific reaction of plants to these stressors.
		
	
		
    
    CONFLICT OF INTEREST
    
    	The authors have declared that no conflict of interests exist.
     
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