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    <mxCell id="node2" value="策略：从北极土壤分离98株真菌，以柠檬烯为唯一碳源筛选，获得M. minutissima 01" style="rounded=1;whiteSpace=wrap;html=1;fillColor=#fff2cc;strokeColor=#d6b656;fontSize=13;fontStyle=1;arcSize=8;verticalAlign=middle;align=center;" vertex="1" parent="1">
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    <mxCell id="node3" value="筛选：71株可生长；M. minutissima 01产量最高（紫苏醇22.9 mg/L、紫苏酸12.5 mg/L）" style="rounded=1;whiteSpace=wrap;html=1;fillColor=#ffe6cc;strokeColor=#d79b00;fontSize=13;fontStyle=1;arcSize=8;verticalAlign=middle;align=center;" vertex="1" parent="1">
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    <mxCell id="node4" value="优化（培养基/底物）：M-II培养基+0.8%底物→紫苏醇~125 mg/L（对照29.1 mg/L）" style="rounded=1;whiteSpace=wrap;html=1;fillColor=#d5e8d4;strokeColor=#82b366;fontSize=13;fontStyle=1;arcSize=8;verticalAlign=middle;align=center;" vertex="1" parent="1">
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    <mxCell id="node5" value="优化（pH/温度）：pH=6→124 mg/L；15°C→125.6 mg/L（低温减少挥发）" style="rounded=1;whiteSpace=wrap;html=1;fillColor=#d5e8d4;strokeColor=#82b366;fontSize=13;fontStyle=1;arcSize=8;verticalAlign=middle;align=center;" vertex="1" parent="1">
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    <mxCell id="node6" value="优化（时间）：120 h→112.3 mg/L；高浓度(1.2%)抑制菌体生长" style="rounded=1;whiteSpace=wrap;html=1;fillColor=#d5e8d4;strokeColor=#82b366;fontSize=13;fontStyle=1;arcSize=8;verticalAlign=middle;align=center;" vertex="1" parent="1">
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    <mxCell id="node7" value="结果：紫苏醇产量超120 mg/L，低温高效转化" style="rounded=1;whiteSpace=wrap;html=1;fillColor=#f8cecc;strokeColor=#b85450;fontSize=14;fontStyle=1;arcSize=8;verticalAlign=middle;align=center;" vertex="1" parent="1">
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