【auxin】 - A-level备考词汇

auxin

UK:  ['ɔ:ksɪn]

US:  ['ɔ:ksɪn]

复数：auxins  

n.

1.(植物)生长素

2.植物生长激素

3.茁长素

4.促长素

1 . Endogenous auxin is often distributed asymmetrically throughout the plant, accumulated in certain tissues and cells.
生长素的极性运输导致其积累在某些局部组织和细胞内，形成特定梯度分布。

2 . Researchers have known since the nineteen thirties that the actively growing tip of a plant releases a hormone called auxin.
从十九世纪三十年代，研究人员已经知道植物活跃的生长锥释放一种称之为auxin的荷尔蒙。

3 . An auxin increases the growth in length of a plant cell, thus causing the curving of a stem, or roof, in phototropism and geotropism.
植物生长素能加快植物细胞长势，因此使茎弯曲向着阳光，或使根深扎入土。

4 . It is inconsistent to attribute such a short lag period to a result of an auxin effect on gene activity.
将如此短暂的延迟期归结为生长素作用于基因活性的结果走不合适的。

5 . Phytohormones, especially auxin, play essential roles in coordination of these two regulation mechanisms.
植物激素，尤其是生长素在协调体内外调节机制中起着不可或缺的作用。