Institute of Plant Biology and Physiology of the University, Place de la Riponne, CH-1005, Lausanne, Switzerland.
Planta. 1976 Jan;130(3):245-9. doi: 10.1007/BF00387828.
Under light, some growth inhibiting substances were produced in the root cap of maize; they moved basipetally from the tip to the extending zone. An asymmetrical uptake by the root stumps of these inhibitors induced a curvature of the root segments. Evidence was given that these growth regulators, formed in the root cap on exposure to light, can cause root curvature in darkness. Assays with two varieties of maize (Anjou which is georeactive both in dark and in light, and Kelvedon georeacting in light only) and with IAA-applied on the basal cut end of the root segments-were discussed in relation to the light effect on the formation of the cap growth factors. Experiments involving use of ABA-which has some growth properties identical to those of these inhibitors-lead to the conclusion that the light was only acting on the formation, in the root, of the growth-inhibiting substances. But light seems not to have an effect on the transport of these inhibitors from the cap to the stump or on their action on the elongating part of the roots.
在光线下，玉米根冠中会产生一些生长抑制物质；它们从根尖向伸长区向基移动。这些抑制剂被根尖不对称地吸收，导致根段弯曲。有证据表明，这些在根冠中暴露于光下形成的生长调节剂，在黑暗中也能引起根的弯曲。对两种玉米（安茹，在黑暗和光下都有地理反应，以及仅在光下有地理反应的 Kelvedon）进行了与 IAA 应用于根段基部切割端的分析，以探讨光对帽生长因子形成的影响。涉及使用 ABA 的实验 - 其具有与这些抑制剂相同的一些生长特性 - 得出的结论是，光仅作用于根中生长抑制物质的形成。但是，光似乎对这些抑制剂从帽到桩的运输或对它们在根伸长部分的作用没有影响。
