| 单词 |
auxin |
| 释义 |
auxin Plant Physiol.|ˈɔːksɪn|
[G. (F. Kögl & A. J. Haagen Smit 1931, in Proc. Sect. Sci. Kon. Akad. v. Wetenschappen XXXIV. 1416), f. Gr. αὔξ-ειν to increase + -in1.]
An organic substance which promotes and directs the growth of plant cells; a growth hormone.
1934Brit. Chem. Abstr. A. 1332/1 Plant growth substances. X. Constitution of auxin-a and -b. 1936Ann. Reg. 1935 56 Auxin α is an organic hydroxy-acid, Auxin β is a keto-acid. 1937Discovery June 174/1 Putting a block of auxin-charged agar on one side of a coleoptile stump. 1937Went & Thimann Phytohormones 4 The term auxins..will be arbitrarily restricted to those substances which bring about the specific growth reaction which is conveniently measurable by the curvature of Avena coleoptiles. 1955Sci. News Let. 16 July 44/1 A plant growth hormone called auxin controls the shedding of leaves in the fall and the dropping of fruit when it is ripe. |
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