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- W2155304490 abstract "Improving the nutritional quality of food is an important step in addressing worldwide health problems. A field experiment was conducted to evaluate the effects of either Se (0.03mM sodium selenate) or Si (1.5mM potassium silicate ) on the yield components as well as grain and straw qualities of rice cv. Giza 177 and cv. IET 1444 exposed to water deficit condition. Drought stress was imposed by withholding water (irrigation every 10 days). The plants were left to grow under the various treatments for five months. At full maturity (5 months after sowing) the experiment was terminated and grain quality in terms of grain appearance (grain length L, grain breadth B and L/B ratio), cooking quality (amylose content and water uptake WU) as well as nutritional (carbohydrates, proteins oil, phenols and flavonoid contents) and anti-nutritional (phytic and oxalic acids) values was estimated. Drought stress reduced grain yield and harvest index (HI) as well as L/B ratio of the two rice cultivars, parallel with reduction in total soluble carbohydrate, starch, protein, oil, phenols, and flavonoid contents. In contrast, drought induced a subsequent increase in stress tolerance index (STI), amylose and total antioxidant capacity for yielded grains of both rice cultivars. Moreover, the decline in grain phytic acid under drought stress was concomitant with an increase in oxalic acid, calcium and iron ions level of stressed grains. Both Se and Si pretreatments mitigated the adverse effects of drought and improved yield quality via the increments in the levels of amylose, phenolic compounds as well as flavonoid and oil contents concomitant with reduction in grain water uptake during cooking. In addition, selenium and silicon treatments caused further increases in lignin, cellulose and pectin contents of rice straw as compared with those of drought-stressed plants parallel with increments in total carbohydrate, protein, phytate, Ca and P ions levels." @default.
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- W2155304490 date "2014-04-01" @default.
- W2155304490 modified "2023-09-22" @default.
- W2155304490 title "Effect of selenium and silicon on yield quality of rice plant grown under drought stress" @default.
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