Table 2

<body topmargin=0 leftmargin=0 marginheight=0 marginwidth=0> <table cellpadding=0 cellspacing=0 border=0><tr> <td valign="top" colspan=2 height=82 BGCOLOR="#006699" TEXT="#080000"> <div> <FONT SIZE="5" COLOR="#FFFFFF" FACE="Arial" ><B>Martin Hodson</B></FONT><B>     |     </B><A HREF="index.html" TARGET="_top" TITLE="Martin Hodson"><U><B>home</B></U></A></div> <bR> <div> </div> </td> </tr><tr> <td valign="top" width=210 BGCOLOR="#FFCC66" TEXT="#080000"> <div> <B>Back to </B><A HREF="silabiostress.htm" TARGET="_top" TITLE="Silicon and Abiotic Stress"><U><B>Silicon and Abiotic Stress</B></U></A></div> <div> <B>Key to table:</B></div> <div> <B> (a), outer tangential wall;</B></div> <div> <B> (b), radial wall; </B></div> <div> <B>m, mid-point of needle;</B></div> <div> <B> nd, not determined.</B></div> </td> <td valign="top" height=398 BGCOLOR="#FFFFFF" TEXT="#080000"> <div> <I>Table 2</I></div> <div> <B><U>Table 2. Silicon and aluminium content of the cell walls of five tissues of mature needles of six conifer taxa as determined by EDX microanalysis and expressed as mean values in mmol/kg (n= 5)</U></B></div> <bR> <div> <TABLE BORDER="2" CELLPADDING="1" CELLSPACING="1" WIDTH="894" BORDERCOLORLIGHT="#C0C0C0" BORDERCOLORDARK="#808080" FRAME="BOX" RULES="ALL" HSPACE="0" VSPACE="0" > <tR> <tD VALIGN=TOP HEIGHT= 39 WIDTH="209"><div> <B>Conifer species</B></div> </tD> <tD VALIGN=TOP><NOBR><div> <B>Soil pH</B></div> </NOBR></tD> <tD VALIGN=TOP WIDTH="70"><div> <B>Leaf age (yr.)</B></div> </tD> <tD VALIGN=TOP><NOBR><div> <B>Element</B></div> </NOBR></tD> <tD VALIGN=TOP><NOBR><div> <B>Epid-</B></div> <div> <B>ermis (a)</B></div> </NOBR></tD> <tD VALIGN=TOP WIDTH="94"><div> <B>Hypo-dermis (b)</B></div> </tD> <tD VALIGN=TOP><NOBR><div> <B>Meso-</B></div> <div> <B>phyll (b)</B></div> </NOBR></tD> <tD VALIGN=TOP WIDTH="82"><div> <B>Endoder-mis (a)</B></div> </tD> <tD VALIGN=TOP WIDTH="97"><div> <B>Transfusion tracheid (b)</B></div> </tD> </tR> </TABLE></div> <div> <TABLE BORDER="2" CELLPADDING="1" CELLSPACING="1" WIDTH="894" BORDERCOLORLIGHT="#C0C0C0" BORDERCOLORDARK="#808080" FRAME="BOX" RULES="ALL" HSPACE="0" VSPACE="0" > <tR> <tD VALIGN=TOP HEIGHT= 19 ><NOBR><div> <I>Pinus strobus</I> L., White pine </div> </NOBR></tD> <tD VALIGN=TOP WIDTH="58"><div> 4.2</div> </tD> <tD VALIGN=TOP WIDTH="70"><div> 2</div> </tD> <tD VALIGN=TOP WIDTH="70"><div> Si</div> </tD> <tD VALIGN=TOP WIDTH="82"><div> 200</div> </tD> <tD VALIGN=TOP WIDTH="94"><div> 200</div> </tD> <tD VALIGN=TOP WIDTH="82"><div> 1500</div> </tD> <tD VALIGN=TOP WIDTH="82"><div> 500</div> </tD> <tD VALIGN=TOP WIDTH="97"><div> 5800</div> </tD> </tR> </TABLE></div> <div> <TABLE BORDER="2" CELLPADDING="1" CELLSPACING="1" WIDTH="894" BORDERCOLORLIGHT="#C0C0C0" BORDERCOLORDARK="#808080" FRAME="BOX" RULES="ALL" HSPACE="0" VSPACE="0" > <tR> <tD VALIGN=TOP HEIGHT= 19 WIDTH="209"><div> <FONT SIZE="3" COLOR="#00BF00" FACE="Arial" >[</FONT><A HREF="silabiostress_35_.htm" TARGET="_top" TITLE="Silicon and Abiotic Stress"><U>35</U></A>,<A HREF="silabiostress_36_.htm" TARGET="_top" TITLE="Silicon and Abiotic Stress"><U>36</U></A><FONT SIZE="3" COLOR="#00BF00" FACE="Arial" >]</FONT></div> </tD> <tD VALIGN=TOP WIDTH="58"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="19" ALIGN="bottom" WIDTH="58" HSPACE="0" VSPACE="0"></tD> <tD VALIGN=TOP WIDTH="70"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="19" ALIGN="bottom" WIDTH="70" HSPACE="0" VSPACE="0"></tD> <tD VALIGN=TOP WIDTH="70"><div> Al</div> </tD> <tD VALIGN=TOP WIDTH="82"><div> 15</div> </tD> <tD VALIGN=TOP WIDTH="94"><div> 5</div> </tD> <tD VALIGN=TOP WIDTH="82"><div> 25</div> </tD> <tD VALIGN=TOP WIDTH="82"><div> 15</div> </tD> <tD VALIGN=TOP WIDTH="97"><div> 45</div> </tD> </tR> </TABLE></div> <div> <TABLE BORDER="2" CELLPADDING="1" CELLSPACING="1" WIDTH="894" BORDERCOLORLIGHT="#C0C0C0" BORDERCOLORDARK="#808080" FRAME="BOX" RULES="ALL" HSPACE="0" VSPACE="0" > <tR> <tD VALIGN=TOP HEIGHT= 19 ><NOBR><div> <I>Tsuga canadensis</I> (L.) Carr.,</div> </NOBR></tD> <tD VALIGN=TOP WIDTH="58"><div> 4.2</div> </tD> <tD VALIGN=TOP WIDTH="70"><div> 3</div> </tD> <tD VALIGN=TOP WIDTH="70"><div> Si</div> </tD> <tD VALIGN=TOP WIDTH="82"><div> 60</div> </tD> <tD VALIGN=TOP WIDTH="94"><div> 1200</div> </tD> <tD VALIGN=TOP WIDTH="82"><div> 330</div> </tD> <tD VALIGN=TOP WIDTH="82"><div> 300</div> </tD> <tD VALIGN=TOP WIDTH="97"><div> 1000</div> </tD> </tR> </TABLE></div> <div> <TABLE BORDER="2" CELLPADDING="1" CELLSPACING="1" WIDTH="894" BORDERCOLORLIGHT="#C0C0C0" BORDERCOLORDARK="#808080" FRAME="BOX" RULES="ALL" HSPACE="0" VSPACE="0" > <tR> <tD VALIGN=TOP HEIGHT= 19 WIDTH="209"><div> Eastern hemlock *</div> </tD> <tD VALIGN=TOP WIDTH="58"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="19" ALIGN="bottom" WIDTH="58" HSPACE="0" VSPACE="0"></tD> <tD VALIGN=TOP WIDTH="70"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="19" ALIGN="bottom" WIDTH="70" HSPACE="0" VSPACE="0"></tD> <tD VALIGN=TOP WIDTH="70"><div> Al</div> </tD> <tD VALIGN=TOP WIDTH="82"><div> 60</div> </tD> <tD VALIGN=TOP WIDTH="94"><div> 65</div> </tD> <tD VALIGN=TOP WIDTH="82"><div> 10</div> </tD> <tD VALIGN=TOP WIDTH="82"><div> 20</div> </tD> <tD VALIGN=TOP WIDTH="97"><div> 40</div> </tD> </tR> </TABLE></div> <div> <TABLE BORDER="2" CELLPADDING="1" CELLSPACING="1" WIDTH="894" BORDERCOLORLIGHT="#C0C0C0" BORDERCOLORDARK="#808080" FRAME="BOX" RULES="ALL" HSPACE="0" VSPACE="0" > <tR> <tD VALIGN=TOP HEIGHT= 38 WIDTH="209"><div> <I>Picea glauca</I> (Moench.) Voss,</div> </tD> <tD VALIGN=TOP WIDTH="58"><div> 4.2</div> </tD> <tD VALIGN=TOP WIDTH="70"><div> 5</div> </tD> <tD VALIGN=TOP WIDTH="70"><div> Si</div> </tD> <tD VALIGN=TOP WIDTH="82"><div> 280</div> </tD> <tD VALIGN=TOP WIDTH="94"><div> 630<FONT SIZE="1" COLOR="#993300" FACE="Arial" >m</FONT></div> </tD> <tD VALIGN=TOP WIDTH="82"><div> nd</div> </tD> <tD VALIGN=TOP WIDTH="82"><div> 1100<FONT SIZE="1" COLOR="#993300" FACE="Arial" >m</FONT></div> </tD> <tD VALIGN=TOP WIDTH="97"><div> nd</div> </tD> </tR> </TABLE></div> <div> <TABLE BORDER="2" CELLPADDING="1" CELLSPACING="1" WIDTH="894" BORDERCOLORLIGHT="#C0C0C0" BORDERCOLORDARK="#808080" FRAME="BOX" RULES="ALL" HSPACE="0" VSPACE="0" > <tR> <tD VALIGN=TOP HEIGHT= 19 WIDTH="209"><div> White spruce [<FONT SIZE="3" COLOR="#0000FF" FACE="Arial" ><A HREF="silabiostress_37_.htm" TARGET="_top" TITLE="Silicon and Abiotic Stress"><U>37</U></A></FONT>]</div> </tD> <tD VALIGN=TOP WIDTH="58"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="19" ALIGN="bottom" WIDTH="58" HSPACE="0" VSPACE="0"></tD> <tD VALIGN=TOP WIDTH="70"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="19" ALIGN="bottom" WIDTH="70" HSPACE="0" VSPACE="0"></tD> <tD VALIGN=TOP WIDTH="70"><div> Al</div> </tD> <tD VALIGN=TOP WIDTH="82"><div> 70</div> </tD> <tD VALIGN=TOP WIDTH="94"><div> 35<FONT SIZE="1" COLOR="#993300" FACE="Arial" >m</FONT></div> </tD> <tD VALIGN=TOP WIDTH="82"><div> nd</div> </tD> <tD VALIGN=TOP WIDTH="82"><div> 25<FONT SIZE="1" COLOR="#993300" FACE="Arial" >m</FONT></div> </tD> <tD VALIGN=TOP WIDTH="97"><div> nd</div> </tD> </tR> </TABLE></div> <div> <TABLE BORDER="2" CELLPADDING="1" CELLSPACING="1" WIDTH="894" BORDERCOLORLIGHT="#C0C0C0" BORDERCOLORDARK="#808080" FRAME="BOX" RULES="ALL" HSPACE="0" VSPACE="0" > <tR> <tD VALIGN=TOP HEIGHT= 19 ><NOBR><div> <I>Abies balsamea</I> (L.) Mill.,</div> </NOBR></tD> <tD VALIGN=TOP WIDTH="58"><div> 4.2</div> </tD> <tD VALIGN=TOP WIDTH="70"><div> 4</div> </tD> <tD VALIGN=TOP WIDTH="70"><div> Si</div> </tD> <tD VALIGN=TOP WIDTH="82"><div> 75</div> </tD> <tD VALIGN=TOP WIDTH="94"><div> 25</div> </tD> <tD VALIGN=TOP WIDTH="82"><div> 15</div> </tD> <tD VALIGN=TOP WIDTH="82"><div> 25</div> </tD> <tD VALIGN=TOP WIDTH="97"><div> nd</div> </tD> </tR> </TABLE></div> <div> <TABLE BORDER="2" CELLPADDING="1" CELLSPACING="1" WIDTH="894" BORDERCOLORLIGHT="#C0C0C0" BORDERCOLORDARK="#808080" FRAME="BOX" RULES="ALL" HSPACE="0" VSPACE="0" > <tR> <tD VALIGN=TOP HEIGHT= 19 WIDTH="209"><div> Balsam fir [<FONT SIZE="3" COLOR="#0000FF" FACE="Arial" ><A HREF="silabiostress_38_.htm" TARGET="_top" TITLE="Silicon and Abiotic Stress"><U>38</U></A></FONT>]</div> </tD> <tD VALIGN=TOP WIDTH="58"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="19" ALIGN="bottom" WIDTH="58" HSPACE="0" VSPACE="0"></tD> <tD VALIGN=TOP WIDTH="70"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="19" ALIGN="bottom" WIDTH="70" HSPACE="0" VSPACE="0"></tD> <tD VALIGN=TOP WIDTH="70"><div> Al</div> </tD> <tD VALIGN=TOP WIDTH="82"><div> 70</div> </tD> <tD VALIGN=TOP WIDTH="94"><div> 15</div> </tD> <tD VALIGN=TOP WIDTH="82"><div> 30</div> </tD> <tD VALIGN=TOP WIDTH="82"><div> 10</div> </tD> <tD VALIGN=TOP WIDTH="97"><div> nd</div> </tD> </tR> </TABLE></div> <div> <TABLE BORDER="2" CELLPADDING="1" CELLSPACING="1" WIDTH="894" BORDERCOLORLIGHT="#C0C0C0" BORDERCOLORDARK="#808080" FRAME="BOX" RULES="ALL" HSPACE="0" VSPACE="0" > <tR> <tD VALIGN=TOP HEIGHT= 19 ><NOBR><div> <I>Larix laricina</I> (Du Roi) </div> </NOBR></tD> <tD VALIGN=TOP WIDTH="58"><div> 6.7</div> </tD> <tD VALIGN=TOP WIDTH="70"><div> 1</div> </tD> <tD VALIGN=TOP WIDTH="70"><div> Si</div> </tD> <tD VALIGN=TOP WIDTH="82"><div> 1900</div> </tD> <tD VALIGN=TOP WIDTH="94"><div> 250</div> </tD> <tD VALIGN=TOP WIDTH="82"><div> 60</div> </tD> <tD VALIGN=TOP WIDTH="82"><div> 25</div> </tD> <tD VALIGN=TOP WIDTH="97"><div> 25</div> </tD> </tR> </TABLE></div> <div> <TABLE BORDER="2" CELLPADDING="1" CELLSPACING="1" WIDTH="894" BORDERCOLORLIGHT="#C0C0C0" BORDERCOLORDARK="#808080" FRAME="BOX" RULES="ALL" HSPACE="0" VSPACE="0" > <tR> <tD VALIGN=TOP HEIGHT= 19 ><NOBR><div> K. Koch, American larch [<FONT SIZE="3" COLOR="#0000FF" FACE="Arial" ><A HREF="silabiostress_39_.htm" TARGET="_top" TITLE="Silicon and Abiotic Stress"><U>39</U></A></FONT>]</div> </NOBR></tD> <tD VALIGN=TOP WIDTH="58"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="19" ALIGN="bottom" WIDTH="58" HSPACE="0" VSPACE="0"></tD> <tD VALIGN=TOP WIDTH="70"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="19" ALIGN="bottom" WIDTH="70" HSPACE="0" VSPACE="0"></tD> <tD VALIGN=TOP WIDTH="70"><div> Al</div> </tD> <tD VALIGN=TOP WIDTH="82"><div> 60</div> </tD> <tD VALIGN=TOP WIDTH="94"><div> 20</div> </tD> <tD VALIGN=TOP WIDTH="82"><div> 10</div> </tD> <tD VALIGN=TOP WIDTH="82"><div> 15</div> </tD> <tD VALIGN=TOP WIDTH="97"><div> 18</div> </tD> </tR> </TABLE></div> <div> <TABLE BORDER="2" CELLPADDING="1" CELLSPACING="1" WIDTH="894" BORDERCOLORLIGHT="#C0C0C0" BORDERCOLORDARK="#808080" FRAME="BOX" RULES="ALL" HSPACE="0" VSPACE="0" > <tR> <tD VALIGN=TOP HEIGHT= 19 ><NOBR><div> <I>Larix decidua</I> (L.) Mill.,</div> </NOBR></tD> <tD VALIGN=TOP WIDTH="58"><div> 6.7</div> </tD> <tD VALIGN=TOP WIDTH="70"><div> 1</div> </tD> <tD VALIGN=TOP WIDTH="70"><div> Si</div> </tD> <tD VALIGN=TOP WIDTH="82"><div> 2300</div> </tD> <tD VALIGN=TOP WIDTH="94"><div> 700</div> </tD> <tD VALIGN=TOP WIDTH="82"><div> 25</div> </tD> <tD VALIGN=TOP WIDTH="82"><div> 25</div> </tD> <tD VALIGN=TOP WIDTH="97"><div> 15</div> </tD> </tR> </TABLE></div> <div> <TABLE BORDER="2" CELLPADDING="1" CELLSPACING="1" WIDTH="894" BORDERCOLORLIGHT="#C0C0C0" BORDERCOLORDARK="#808080" FRAME="BOX" RULES="ALL" HSPACE="0" VSPACE="0" > <tR> <tD VALIGN=TOP HEIGHT= 19 WIDTH="209"><div> European larch [<FONT SIZE="3" COLOR="#0000FF" FACE="Arial" ><A HREF="silabiostress_39_.htm" TARGET="_top" TITLE="Silicon and Abiotic Stress"><U>39</U></A></FONT>]</div> </tD> <tD VALIGN=TOP WIDTH="58"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="19" ALIGN="bottom" WIDTH="58" HSPACE="0" VSPACE="0"></tD> <tD VALIGN=TOP WIDTH="70"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="19" ALIGN="bottom" WIDTH="70" HSPACE="0" VSPACE="0"></tD> <tD VALIGN=TOP WIDTH="70"><div> Al</div> </tD> <tD VALIGN=TOP WIDTH="82"><div> 30</div> </tD> <tD VALIGN=TOP WIDTH="94"><div> 15</div> </tD> <tD VALIGN=TOP WIDTH="82"><div> 12</div> </tD> <tD VALIGN=TOP WIDTH="82"><div> 15</div> </tD> <tD VALIGN=TOP WIDTH="97"><div> 10</div> </tD> </tR> </TABLE></div> <bR> <div> Unless otherwise stated all determinations were conducted using frozen hydrated sections from the needle tip.</div> <div> (a), outer tangential wall; (b), radial wall; m, mid-point of needle; nd, not determined.</div> <div> <FONT SIZE="3" COLOR="#000000" FACE="Arial" >*, approx. values derived from unpublished data; all other data derived from our previous publications [</FONT><A HREF="silabiostress_35_.htm" TARGET="_top" TITLE="Silicon and Abiotic Stress"><U>35</U></A>,<A HREF="silabiostress_36_.htm" TARGET="_top" TITLE="Silicon and Abiotic Stress"><U>36</U></A>,<A HREF="silabiostress_37_.htm" TARGET="_top" TITLE="Silicon and Abiotic Stress"><U>37</U></A>,<A HREF="silabiostress_38_.htm" TARGET="_top" TITLE="Silicon and Abiotic Stress"><U>38</U></A>,<A HREF="silabiostress_39_.htm" TARGET="_top" TITLE="Silicon and Abiotic Stress"><U>39</U></A><FONT SIZE="3" COLOR="#000000" FACE="Arial" >] .</FONT></div> </td> </tr></table></body>