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[目的]明确水稻叶片前平后卷的主要生物学效应,为RL(t)在水稻育种中的应用提供理论依据。[方法]在水稻杂交后代材料中发现一个新的内卷叶突变材料,暂时命名为RL(t),研究了RL(t)与平展叶姊妹系0731-3-1-1B在叶片受光姿态、光合效率及细胞组织结构的差异。[结果]RL(t)较平展叶姊妹保持系三片功能叶明显表现出卷曲度大、挺直度高、叶基角小、披垂角小,相应地,提高了卷叶保持系群体各层尤其上部和中部的透光率;三片功能叶的气孔导度、胞间CO2浓度和剑叶、倒二叶的蒸腾速率显著高于平展叶姊妹保持系,从而提高了RL(t)剑叶、倒二叶的光合速率;由于卷叶保持系部分泡状细胞适度萎缩变小,导致叶片内向卷曲。[结论]该研究为内卷叶性状应用于水稻高产育种提供了理论依据。
[Objective] The research aimed to clarify the major biological effects of rice leaf volume before and after rolling, and provide the theoretical basis for the application of RL (t) in rice breeding. [Method] A new leaf curl mutant was found in rice hybrid progenies and was temporarily named as RL (t). The effects of RL (t) and sister line 0731-3-1-1B on the light receiving position, Photosynthetic efficiency and differences in cell structure. [Result] RL (t) showed more curly degree, higher straightness, smaller leaf base angle and smaller sagging angle than the three functional leaves of RL (t) Especially in the upper and middle parts of the leaves. The stomatal conductance, the intercellular CO2 concentration and the transpiration rate of the flag leaves and the second leaves of the three functional leaves were significantly higher than those of the sister slender leaves of the flattened leaves, thus increasing the RL (t) Leaf, the second leaf photosynthetic rate; due to curly leaf retention Department of vesicular cells moderate shrinkage smaller, leading to inward curly leaves. [Conclusion] This study provided the theoretical basis for the application of leaf curl in rice breeding.