Journal of Integrative Agriculture (Mar 2012)
Photosynthesis and Dry Matter Accumulation in Different Chlorophyll-Deficient Rice Lines
Abstract
Three different chlorophyll-deficient rice isogenic lines chl, fgl and pgl, and their recurrent parent zhefu802 (zf802) were used to study effects of leaf color on photosynthesis, dry matter accumulation, yield, and quality in early season indica rice. Analysis showed that the chlorophyll (Chl.) a/b ratio of isogenic lines chl-8, pgl and fgl was 5.35, 10.00 and 15.46, respectively, among them, line fgl had higher leaf area index (LAI), higher net photosynthetic rate and higher grain-filling rate than its recurrent parent zf802 at the later period of grain filling stage; while LAI, net photosynthetic rate and dry matter accumulated in lines chl-8 and pgl were lower than in zf802. Differences were found in the grain yield and quality among chlorophyll deficient isogenic lines, lines fgl, chl-8 and zf802 had similar grain yield, which was significantly higher than that of pgl; the highest milling quality was observed in isogenic line fgl, with relatively high protein content. This study showed that isogenic line fgl would become a unique material for the development of high yield rice with high grain quality because of its slow aging process and relative steady grain-filling rate.
