Photosynthesis

<body topmargin=0 leftmargin=0 marginheight=0 marginwidth=0> <table cellpadding=0 cellspacing=0 border=0><tr> <td valign="top" colspan=2 height=100 BGCOLOR="#000000" TEXT="#F7F7FF" background="93200640dvldtc.jpg"> <div> <B>        </B><FONT SIZE="7" COLOR="#FFFFFF" FACE="Maiandra GD" ><B> </B></FONT></div> <div> </div> </td> </tr><tr> <td valign="top" width=180 BGCOLOR="#000000" TEXT="#F7F7FF" background="92d40bc3.jpg"> <div> <B><IMG SRC="b1d998c0.jpg" border=0 width="153" height="140" ALT="Gaian Life - Organic and Eco-Lifestyles" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></B></div> <div> <A HREF="reports_top_2.htm" TARGET="_top" TITLE="Reports"><B>Page Top</B></A></div> </td> <td valign="top" height=380 width="100%" BGCOLOR="#000000" TEXT="#F7F7FF"> <div> <TABLE BORDER="16" CELLPADDING="2" CELLSPACING="1" WIDTH="679" BORDERCOLORLIGHT="#99CC66" BORDERCOLORDARK="#336600" FRAME="BOX" RULES="ALL" HSPACE="0" VSPACE="0" > <tR> <tD VALIGN=TOP HEIGHT= 56 WIDTH="639"><div> <A HREF="environmental_indicators.htm" TARGET="_top" TITLE="Environmental Indicators">Environmental Indicators</A>   |   <A HREF="media.htm" TARGET="_top" TITLE="Media">Media</A>   |   <A HREF="basic_page.htm" TARGET="_top" TITLE="Presentations">Presentations</A>   |   <A HREF="reports.htm" TARGET="_top" TITLE="Reports">Reports</A>   |   <B>Photosynthesis</B></div> </tD> </tR> </TABLE></div> <bR> <div> <B> <TABLE BORDER="10" CELLPADDING="2" CELLSPACING="1" WIDTH="680" BORDERCOLORLIGHT="#990099" BORDERCOLORDARK="#990033" FRAME="BOX" RULES="ALL" HSPACE="0" VSPACE="0" > <tR> <tD VALIGN=TOP HEIGHT= 185 WIDTH="652"><div> <A HREF="xanth1.htm" TARGET="_top" TITLE="xanth1"><B>Xanthophyll Cycling as a stress response</B></A></div> <div> A poster presentation given at a progress meeting with the <A HREF="epa.htm" TARGET="_top" TITLE="epa">Environmental Protection Agency</A>.</div> <div> Plant pigments may undergo a reversible change into a different form in order to protect the photosynthetic systems from damage during stress. This is known as xanthophyll cycling. The xanthophylls are members of the carotenoid pigments which are responsible for the colorful leaves on trees in the autumn.</div> </tD> </tR> <tR> <tD VALIGN=TOP HEIGHT= 202 WIDTH="652"><div> <A HREF="xanth2.htm" TARGET="_top" TITLE="xanth2"><B>Xanthophyll Pigments and Remote Sensing</B></A></div> <bR> <div> A poster presentation given at a progress meeting with the <A HREF="containerpage.htm" TARGET="_top" TITLE="pie">Long Term Environmental Research</A> group.</div> <div> The varying levels of xanthophyll cycling produced in response to different environmental stressors cause varying changes in the wavelengths of light reflected back from a plant's surface (i.e. very small changes in leaf colour). 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