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Salicylic acid alleviates copper toxicity in rice ( Oryza sativa L . ) seedlings by up - regulating antioxidative and glyoxalase systems .
 Chemical: Salicylic acid; Chemical: copper
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: Salicylic acid; Chemical: copper