Light-induced chloroplast movements control efficient light utilization in leaves, and thus, are essential for leaf photosynthesis and biomass production under fluctuating light conditions. Chloroplast movements have been intensively analyzed using wild-type and mutant plants of Arabidopsis thaliana. The molecular mechanism and the contribution to biomass production were elucidated. However, the knowledge of chloroplast movements is very scarce in other plant species, especially grass species including crop plants. Because chloroplast movements are efficient strategy to optimize light capture in leaves and thus promote leaf photosynthesis and biomass, analysis of chloroplast movements in crops is required for biomass production. Here, we analyzed chloroplast movements in a wide range of cultivated and wild species of genus Oryza. All examined Oryza species showed the blue-light-induced chloroplast movements. However, O. sativa and its ancestral species O. rufipogon, both of which are AA-genome species and usually grown in open condition where plants are exposed to full sunlight, showed the much weaker chloroplast movements than Oryza species that are usually grown under shade or semi-shade conditions, including O. officinalis, O. eichingeri, and O. granulata. Further detailed analyses of different O. officinalis accessions, including sun, semi-shade, and shade accessions, indicated that the difference in chloroplast movement strength between domesticated rice plants and wild species might result from the difference in habitat, and the shape of mesophyll chlorenchyma cells. The findings of this study provide useful information for optimizing Oryza growth conditions, and lay the groundwork for improving growth and yield in staple food crop Oryza sativa.

光诱导的叶绿体运动控制了叶片中有效的光利用，因此，在波动的光照条件下，对于叶片的光合作用和生物量的生产至关重要。使用拟南芥的野生型和突变型植物对叶绿体运动进行了深入分析。阐明了分子机制及其对生物量生产的贡献。但是，在其他植物物种中，尤其是草木物种，包括农作物，对叶绿体运动的了解非常少。由于叶绿体运动是优化叶片中光捕获并因此促进叶片光合作用和生物量的有效策略，因此需要对作物中叶绿体运动进行分析以生产生物量。在这里，我们分析了稻谷属多种栽培和野生物种中的叶绿体运动。所有检查的稻属物种均显示出蓝光诱导的叶绿体运动。但是，紫花苜蓿及其祖先物种红景天，这两个都是AA基因组物种，通常在开放的条件下生长，在植物暴露于阳光下的情况下，它们的叶绿体运动比通常在阴影或半阴影条件下生长的Oryza物种弱得多，包括O. officinalis，O eichingeri和O. granulata。对包括太阳，半荫和阴天在内的不同O. officinalis品种的进一步详细分析表明，驯化的水稻植物与野生物种之间的叶绿体运动强度差异可能是由于生境的差异以及叶肉中绿藻的形状引起的。细胞。这项研究的发现为优化Oryza提供了有用的信息生长条件，为改善主食作物稻的生长和产量奠定基础。