[xsl] space between wrapped lines

How do I reduce line space between wrapped lines of text in a block.
I tried line height and space after/before... did not work. The code looks
like this:

<fo:block>
  <xsl:for-each select="data">
    <fo:inline font-size="9pt" font-style="italic" font-weight="bold">
      <xsl:apply-templates/>
    </fo:inline>
  </xsl:for-each>
</fo:block>


thanks in advance,

Anu