26106
Some members of the HKT protein family have been shown to be critical for salinity tolerance in commercially important crop species , particularly in grains , through exclusion of Na + ions from sensitive shoot tissues in plants .
 Chemical: Na +
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: Na +