Solar radiation and rice productivity

This paper suggests that light intensity during the rice plant"s reproductive phase may be crucial for higher productivity and nitrogen responsiveness. The paper reviews several studies on the influence of solar radiation on productivity, relevant plant factors including leaf area and plant type, growth phases, the effects of light stress on photosynthesis, light quality, and translocation. Information on yield components under low-light stress, including grain filling, highlights the relationship between structure and function. These studies, it is concluded, have revealed the possibility of developing cultivars that will do well under low-light conditions. Promising lines of investigation for developing suitable plant types are indicated. (Author abstract, modified)