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    <mxCell id="node1" value="研究问题: Trichoderma trichothecenes（尤其Harzianum A）在生防及诱导植物防御基因中的作用？" style="rounded=1;whiteSpace=wrap;html=1;fillColor=#D6EAF8;strokeColor=#2E86C1;fontSize=12;fontStyle=1;verticalAlign=middle;" vertex="1" parent="1">
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    <mxCell id="node3" value="关键改造：tri4基因破坏 &amp; RNAi沉默→阻断/下调HA合成，积累12,13-环氧trichothec-2-醇" style="rounded=1;whiteSpace=wrap;html=1;fillColor=#FDEBD0;strokeColor=#E67E22;fontSize=12;fontStyle=1;verticalAlign=middle;" vertex="1" parent="1">
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    <mxCell id="node4" value="结果(HA产量)：WT 24h=18.60μg/ml；TaΔTri4=0；TaS4-9 48h=12.98μg/ml" style="rounded=1;whiteSpace=wrap;html=1;fillColor=#E8DAEF;strokeColor=#8E44AD;fontSize=12;verticalAlign=middle;" vertex="1" parent="1">
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