[R] How to mix different font styles in axis label of lattice plot?

[Judith Flores]

Hello,

   I have a y-axis label that reads:  "S. schenckii yeast cells". The part that reads "S. schenckii" needs to be in italic style, the rest of the text is normal style. How can I specify the different font styles for each part of the y-axis label?  

Thank you,

Judith