MSU/AEC Plant Research Laboratory, Michigan State University, East Lansing.
Planta. 1969 Sep;88(3):204-14. doi: 10.1007/BF00385063.
In coleoptiles of the amylomaize corn mutant (AM), the amyloplasts are much reduced in size in comparison with the wild type corn (WT), permitting a comparison of geotropic responsiveness as related to lateral displacement of amyloplasts and lateral transport of auxin. The amyloplasts of AM showed 30-40% lesser lateral redistribution in response to horizontal exposure in comparison with WT. With geotropic stimulation, the lateral transport of auxin in the direction of growth was 40-80% less, and the geotropic curvature by the coleoptiles was also significantly less in the mutant as compared with WT. These correlations support the hypothesis that the starch plastids serve as gravity sensors in the geotropic responses of coleoptiles.
在玉米突变体（AM）的胚芽鞘中，与野生型玉米（WT）相比，淀粉体的大小要小得多，这使得我们可以比较淀粉体的侧向位移和生长素的侧向运输与向地性响应的关系。与 WT 相比，AM 的淀粉体在水平暴露时的侧向再分配减少了 30-40%。在向地性刺激下，生长素在生长方向上的侧向运输减少了 40-80%，与 WT 相比，突变体胚芽鞘的向地性曲率也显著减小。这些相关性支持淀粉体作为胚芽鞘向地性反应中重力传感器的假说。
