自家中毒発生イチゴの根から進出したフェノール物質に対する抵抗性メカニズムの解明

草莓植株在循环水培中发生自毒时，会分泌苯甲酸作为潜在的化感物质。外源施用苯甲酸对草莓植株生长的抑制作用随着浓度的增加而逐渐增强。同时发现，草莓根系损伤始于营养液中苯甲酸含量为25 μM/L。在此浓度下，根变黑，活性降低。在NBT和DAB试验中，与对照相比，苯甲酸处理的草莓根系呈现出强烈的颜色，表明化感化学/苯甲酸对草莓根系产生了胁迫条件。酶促反应还显示SOD、POD、CAT和APX活性上调，MDA、O2活性下调。-和H2O2活性。

Strawberry plants when experiences autotoxicity in recycled hydroponics exudates benzoic acid as their potential allelochemical. Exogenous application of benzoic acid showed gradual inhibition of growth of strawberry plantlets with the increase in concentration. It also found that, strawberry root injury start from 25 μM/L benzoic acid in the nutrient solution. Roots showed black discoloration and lower activity after this concentration. Compared to control, roots from benzoic acid concentrations showed intense color during NBT and DAB test, which indicate that allelochemical/ benzoic acid created stress condition to strawberry roots. Enzymatic reactions also showed up-regulation of SOD, POD, CAT, and APX activity while showed down regulation of MDA, O2.- and H2O2 activity.