7067
The effects of short - term ( 1 day ) and long - term ( 49 days ) of lead ( Pb ) stress on growth and physiological responses in the leaves and roots of two mangrove plants , Kandelia obovata and Acanthus ilicifolius , were compared .
 Chemical: Pb
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: Pb