Changes of seed quality during the development stage of waxy corn
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Abstract
Timely harvest is an important strategy to achieve the highest quality seed production. Because harvested early or too late to affect the yield and seed quality. Therefore, the objective of this study was to studied on changes of seed quality during development stages of waxy corn seed. The waxy corn seed was harvested at 25, 30, 35, 40, 45, 50, 55 and 60 days after pollination (DAP). The physical properties included seed moisture content and dry weight. The physiological properties including seed vigor as determined by accelerated aging germination index seedling growth rate and electrical conductivity. The biochemical properties included hydrogen peroxide content (H2O2) catalase activity (CAT), peroxidase activity (POD) and malonaldehyde content (MDA) were investigated. This experiment was arranged in completely randomized design (CRD). Physical and physiological properties of seeds were harvesting index for to good quality of seed may start 30 DAP and the physiological maturity was 40 DAP. The biochemical properties were positive correlated the deterioration of waxy corn seed during harvested period, results showed that waxy corn seed was harvested at 25 DAP had the highest of H2O2 content, followed slight decreased until 35 DAP, and then trended to increase at 50 DAP. The MDA content was also to increased, while, the activities of the CAT and POD were decreased depend on duration of seed in the field. The information can be used to plan for seed harvesting, to avoid any damage of natural disaster during seed production.
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