Chalutz E, Devay J E, Maxie E C
Departments of Plant Pathology and Pomology, University of California, Davis, California 95616.
Plant Physiol. 1969 Feb;44(2):235-41. doi: 10.1104/pp.44.2.235.
The concentrations of 3-methyl-6-methoxy-8-hydroxy-3,4-dihydroisocoumarin (MMHD) formed in carrot roots inoculated with certain fungi or treated with indole-3-acetic acid, 2,4-dichlorophenoxyacetic acid, or 2,4,5-trichlorophenoxyacetic acid (2,4,5-T), were related to the amount of ethylene produced by the root tissue. Ethylene applied exogenously in concentrations above 0.3 ppm induced the formation of MMHD in carrot root discs. Continued production of MMHD required the continued presence of ethylene. The amounts of MMHD in the discs were reduced by CO(2), an inhibitor of ethylene action, and by reduction of the partial pressure of ethylene in fungus-inoculated or 2,4,5-T-treated carrot root discs. The results indicate that ethylene is required for the induction of MMHD formation by carrot root tissue.
在接种特定真菌或用吲哚 - 3 - 乙酸、2,4 - 二氯苯氧基乙酸或2,4,5 - 三氯苯氧基乙酸（2,4,5 - T）处理的胡萝卜根中形成的3 - 甲基 - 6 - 甲氧基 - 8 - 羟基 - 3,4 - 二氢异香豆素（MMHD）的浓度，与根组织产生的乙烯量有关。外源施加浓度高于0.3 ppm的乙烯会诱导胡萝卜根圆片中MMHD的形成。MMHD的持续产生需要乙烯的持续存在。乙烯作用抑制剂CO₂以及降低接种真菌或经2,4,5 - T处理的胡萝卜根圆片中乙烯的分压，都会使圆片中MMHD的量减少。结果表明，乙烯是胡萝卜根组织诱导MMHD形成所必需的。
