and mainly reviewed the physiological
metabolism of rice plants, including characteristics of photosynthesis, activities of antioxidant enzymes in
rice leaves and key enzymes involved in starch synthesis in grains, as well as the translocations of
carbohydrate and nitrogen. These characteristics include various grain yield and rice quality components
(milling and appearance as well as cooking, eating and nutritional qualities) under different rates of
shading imposed at the vegetative or reproductive stages of rice plants. Furthermore, we discussed why
grain yield and quality are reduced under the low light environment. Next, we summarized the need for
future research that emphasizes methods can effectively improve rice grain yield and quality under low
light stress. These research findings can provide a beneficial reference for rice cultivation management
and breeding program in low light environments