Science. 1961 Jul 7;134(3471):56-7. 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.
在黑暗中表现向地性生长，在光照下表现向光性生长的现象发生在 3 种香荚兰品种的插条根中。向地性反应也发生在远红光、红光、橙光和绿光中，而正向向光性只有在蓝光存在的情况下才会产生。
