| dc.description.abstract | Colored rice is characterized by pigmented pericarps with high level of photochemical
properties. In this study four colored rice varieties were used as planting materials to
investigate the color developmental stages in the seed pericarp and its possible effect on
different physiological and agronomic traits of colored rice in contrast with white rice.
The phytochemicals are chlorophyll, anthocyanin and proanthocyanidin, which present
only in the pericarp of green, red and black rice; respectively. At the seed developmental
stage, green pericarp rice maintained green color in pericarp even after physiological
maturity stage because the chlorophyll was faded away slowly. But red and black rice
showed increasing color pigments deposition with simultaneous reduction of chlorophyll
in the seed pericarp that indicates reducing photosynthetic rate, leading to low agronomic
traits of colored rice. Most of the important agronomic traits value including plant height,
tillering ability, spikelet fertility were lower in colored rice compared to white rice.
Colored rice had lower value including 1000 seed weights, seed length and seed width
that are related to total yield of colored rice in comparison to white rice. These findings
clearly indicate that the lower agronomic traits of color pericarp rice in compare with
white pericarp rice that might be due to the deposition of pigments in the pericarp. These
findings suggest that the low yield of colored rice is closely related to physiological traits
other than the agronomic traits. | en_US |
