Golaz F W, Pilet P E
Institut de Biologie et de Physiologie Végétales, Bâtiment de Biologie, 1015 Lausanne, Switzerland.
Plant Physiol. 1985 Oct;79(2):377-80. doi: 10.1104/pp.79.2.377.
The effects of white light and decapitation on the initiation and subsequent emergence and elongation of lateral roots of apical maize (Zea mays L. cv LG 11) root segments have been examined. The formation of lateral root primordium was inhibited by the white light. This inhibition did not depend upon the presence of the primary root tip. However, root decapitation induced a shift of the site of appearance of the most apical primordium towards the root apex, and a strong disturbance of the distribution pattern of primordium volumes along the root axis. White light had a significant effect neither on the distribution pattern of primordium volumes, nor on the period of primordium development (time interval required for the smallest detectable primordia to grow out as secondary roots). Thus, considering the rooting initiation and emergence, the light effect was restricted to the initiation phase only. Moreover, white light reduced lateral root elongation as well as primary root growth.
研究了白光和去顶处理对顶端玉米（Zea mays L. cv LG 11）根段侧根起始、随后的出现和伸长的影响。白光抑制侧根原基的形成。这种抑制不依赖于初生根尖的存在。然而，去顶处理导致最顶端原基出现的位置向根尖移动，并强烈扰乱了原基体积沿根轴的分布模式。白光对原基体积的分布模式以及原基发育时期（最小可检测原基生长为次生根所需的时间间隔）均无显著影响。因此，就生根起始和出现而言，光照效应仅局限于起始阶段。此外，白光还降低了侧根伸长以及初生根生长。
