Diageotropism in Vanilla Roots

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Science  07 Jul 1961:
Vol. 134, Issue 3471, pp. 56-57
DOI: 10.1126/science.134.3471.56


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.