衰老过程中IAA氧化酶和细胞分裂素氧化酶活性的上升可能是导致内源激素含量下降的重要原因。
The increasing of IAA oxidase and cytokinin oxidase activities may play a vital role in regulating endogenous IAA and cytokinin contents during the senescence.
棉花细胞质雄性不育花药、叶片和胚珠中，IA A氧化酶、色氨酸合成酶和细胞分裂素氧化酶活性的变化与内源激素含量的变化基本一致。
Changes of the activity of IAA oxidase, tryptophan synthetase and cytokinin oxidase in sterile anther, leaf and ovule were similar to those of phytohormones.
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