Department of Vegetable Crops, University of California, Davis, California 95616.
Plant Physiol. 1979 Mar;63(3):589-90. doi: 10.1104/pp.63.3.589.
Ethylene production in mung bean hypocotyls was greatly increased by treatment with 1-aminocyclopropane-1-carboxylic acid (ACC), which was utilized as the ethylene precursor. Unlike auxin-stimulated ethylene production, ACC-dependent ethylene production was not inhibited by aminoethoxyvinylglycine, which is known to inhibit the conversion of S-adenosylmethionine to ACC. While the conversion of methionine to ethylene requires induction by auxin, the conversion of methionine to S-adenosylmethionine and the conversion of ACC to ethylene do not. It is proposed that the conversion of S-adenosylmethionine to ACC is the rate-limiting step in the biosynthesis of ethylene, and that auxin stimulates ethylene production by inducing the synthesis of the enzyme involved in this reaction.
绿豆下胚轴中的乙烯生成量在经过 1-氨基环丙烷-1-羧酸（ACC）处理后大大增加，ACC 是乙烯的前体物质。与生长素刺激产生的乙烯不同，ACC 依赖性的乙烯生成不会被氨基乙氧基乙烯基甘氨酸抑制，后者已知可抑制 S-腺苷甲硫氨酸向 ACC 的转化。虽然蛋氨酸向乙烯的转化需要生长素诱导，但蛋氨酸向 S-腺苷甲硫氨酸和 ACC 向乙烯的转化则不需要。因此，推测 S-腺苷甲硫氨酸向 ACC 的转化是乙烯生物合成中的限速步骤，而生长素通过诱导参与该反应的酶的合成来刺激乙烯的生成。
