Botany School, University of Oxford, OX1 3RA, Oxford, UK.
Planta. 1972 Sep;109(3):211-24. doi: 10.1007/BF00387085.
Within the root cap in maize the cells believed to be responsible for the perception of gravity possess a rough-surfaced ER system with a distinctive pattern of distribution. The ER is found normally parallel to the nuclear membrane and to the walls, and symmetrically distributed. It can be disturbed from its parallel position by moving the root to any horizontal orientation, but it is not displaced by inverting the root into the 180° vertical position. On returning to the normal position of growth the ER rapidly reforms into the original symmetrical position. The implications of this position and movement and the possible role of the ER are discussed.
在玉米的根冠中，被认为负责感知重力的细胞具有粗糙表面的内质网系统，其分布具有独特的模式。内质网通常与核膜和平行，与细胞壁对称分布。通过将根移动到任何水平方向，可以将内质网从其平行位置扰乱，但通过将根颠倒到 180°垂直位置不会使其移位。当返回正常生长位置时，内质网迅速重新形成原始对称位置。讨论了这种位置和运动的意义以及内质网的可能作用。
