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Diageotropism in Vanilla Roots

James E. Irvine and Ruben H. Freyre
Science
New Series, Vol. 134, No. 3471 (Jul. 7, 1961), pp. 56-57
Stable URL: http://www.jstor.org/stable/1707543
Page Count: 2
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Abstract

Diageotropic growth in the dark and geotropic growth in the light occurred in the roots of cuttings of three Vanilla species. The diageotropic response also occurred in far-red, red, orange, and green light, while positive geotropism resulted only if blue light was present.

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