温度、氧气和赤霉素对伞房花耳草种子在黑暗中萌发期间光敏性发育的影响
Effect of Temperature, Oxygen, and Gibberellic Acid on the Development of Photosensitivity in Oldenlandia corymbosa L. Seeds during Their Incubation in Darkness.
作者信息
Corbineau F, Côme D
机构信息
Laboratoire de Physiologie des Organes Végétaux après Récolte, C.N.R.S., 4 ter, route des Gardes, 92190 Meudon, France.
出版信息
Plant Physiol. 1985 Oct;79(2):411-4. doi: 10.1104/pp.79.2.411.
Two successive phases can be distinguished in the development of the responsiveness to light in Oldenlandia corymbosa L. seeds during their incubation in darkness. During phase I, the responsiveness to light increases with time if there is sufficient O(2), and the higher the temperature, the faster the increase. This phase is stimulated by gibberellic acid. During the following phase (II), seeds remain responsive to light at 10 or 20 degrees C, but lose their responsiveness at higher temperature (>/=30 degrees C). This second phase depends on O(2): loss of responsiveness is accelerated at lower O(2) concentration. Phase II is only slightly affected by gibberellic acid. The results are discussed in terms of variation of phytochrome and of a reaction along the transduction chain initiated by phototransformation of this pigment, which is finally expressed in germination.
在黑暗中培养的伞房花耳草种子对光的反应性发展过程中，可以区分出两个连续的阶段。在第一阶段，如果有足够的氧气，对光的反应性会随时间增加，温度越高，增加速度越快。这个阶段受到赤霉素的刺激。在接下来的第二阶段，种子在10或20摄氏度时仍对光有反应，但在较高温度（≥30摄氏度）下会失去反应性。第二阶段取决于氧气：在较低氧气浓度下，反应性的丧失会加速。第二阶段仅受到赤霉素的轻微影响。根据光敏色素的变化以及由这种色素的光转化引发的沿转导链的反应变化对结果进行了讨论，这种反应最终表现在种子萌发中。
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