scholarly journals Mercury Accumulation in Commercial Varieties of Oryza sativa L. Cultivated in Soils of La Mojana Region, Colombia

Toxics ◽  
2021 ◽  
Vol 9 (11) ◽  
pp. 304
Author(s):  
Germán Enamorado-Montes ◽  
Brayan Reino-Causil ◽  
Iván Urango-Cardenas ◽  
Siday Marrugo-Madrid ◽  
José Marrugo-Negrete
Keyword(s):  
Oryza Sativa ◽  
Oryza Sativa L ◽  
Natural Soil ◽  
Rice Varieties ◽  
High Consumption ◽  
Rice Consumption ◽  
32 Factorial Design ◽  
Chinese Standard ◽  
1000 Grain Weight ◽  
Hg Accumulation

The Hg accumulation in different commercial varieties of Oryza sativa L. was evaluated in the region of La Mojana, Colombia, where rice cultivation has become the staple food of the population living in this area. The varieties studied were Fedearroz-473 (FA473), Fedearroz-2000 (FA2000), and Fedearroz-Mocari (FAM). Soil spiked at different Hg levels was evaluated, (130, 800, and 1500 µg kg−1) using a 32 factorial design that consisted of 3 (rice varieties) × 3 (Hg contents). The biomass, 1000-grain weight, and the accumulation of Hg in the roots, grains, and husks were determined. The highest biomass was found in the FA473 (308.76 ± 108.26 g), and the lowest was found in FAM (144.04 ± 26.45 g) in the 1500 µg kg−1 Hg soil in both cases. The weight per 1000-grains decreased significantly in the soil containing 800 µg of Hg kg−1. Hg accumulation in the organs of the evaluated varieties was higher in the roots, followed by in the husks and grains. The Hg in the rice grains of the evaluated varieties presented levels close to the permissible limit of the Chinese standard (20 μg Hg kg−1) in the evaluated soils and were only exceeded by FA473. Although in natural soil concentrations, the non-cancer health risk (HQ) from rice consumption was lower for FA473 and FAM; Hg enrichment in the soil of La Mojana region may endanger the health of future populations due to their high consumption of rice.

Breeding for Improving Human Nutrition and Grain Quality through Biofortification of Traditional Land Races and Improved Cultivars in Rice (Oryza sativa L.)

2017 ◽  
pp. 126-148
Author(s):  
P. Savitha ◽  
R. Usha Kumari
Keyword(s):  
Oryza Sativa ◽  
Tamil Nadu ◽  
Oryza Sativa L ◽  
Farming Systems ◽  
Total Production ◽  
Micronutrient Deficiencies ◽  
Rice Varieties ◽  
The Family ◽  
Iron And Zinc

Rice (Oryza sativa L.) which belongs to the family poaceae, is the life and the prince among cereals as this unique grain helps to sustain two thirds of the world's population. India have traditionally been used or rice cultivation due to availability of water and conductive soil (Nadesa panic). Rice was grown in 155.30 million hectares and around 600 million tonnes of rice harvested each year globally. About 114 countries produce rice with China and India supporting 50 per cent of total production. India stands first in area under cultivation (41.85 mha) and ranks second in production, where as China ranks first in production with just half of the area. India's production is 89.13 million tonnes with a productivity of 2130 kg/ha. Among the rice producing states of India, Tamil Nadu ranks sixth in production (6.53 million tonnes) and second in productivity of 3918 kg/ha with an area of 20.16 lakh ha (Season and Crop Report, 2012). Local farmers in such farming systems retain the traditional varieties based on their knowledge of the quality of the rice varieties and their adaptation to varying agro-ecological situations created by diverse seasons and land situations (Tapasi das & Ashesh Kumar Das, 2014). Among the major micronutrient deficiencies common in rice consuming countries, iron and zinc deficiencies (“hidden hunger”), affect over three billion people worldwide, mostly in developing countries (Welch & Graham, 2004).

Proline and carbohydrate metabolism in rice varieties (Oryza sativa L.) under various drought and recovery conditions

2019 ◽  
Vol 24 (3) ◽  
pp. 376-387 ◽  
Author(s):  
Doan Cong Dien ◽  
Thieu Thi Phong Thu ◽  
Kyi Moe ◽  
Takeo Yamakawa
Keyword(s):  
Oryza Sativa ◽  
Carbohydrate Metabolism ◽  
Oryza Sativa L ◽  
Rice Varieties

scholarly journals Optimization of Malting Conditions for Two Black Rice Varieties, Black Non-Waxy Rice and Black Waxy Rice (Oryza sativa L. Indica)

2011 ◽  
Vol 117 (1) ◽  
pp. 39-46 ◽  
Author(s):  
Ulaiwan Usansa ◽  
Felix Burberg ◽  
Eberhard Geiger ◽  
Werner Back ◽  
Chokchai Wanapu ◽  
...  
Keyword(s):  
Oryza Sativa ◽  
Oryza Sativa L ◽  
Black Rice ◽  
Rice Varieties ◽  
Waxy Rice

scholarly journals NaCl and Na2SO4 Salinities Have Different Impact on Photosynthesis and Yield-Related Parameters in Rice (Oryza sativa L.)

Agronomy ◽  
2020 ◽  
Vol 10 (6) ◽  
pp. 864
Author(s):  
Willy Irakoze ◽  
Hermann Prodjinoto ◽  
Séverin Nijimbere ◽  
Gervais Rufyikiri ◽  
Stanley Lutts
Keyword(s):  
Oryza Sativa ◽  
Oryza Sativa L ◽  
Net Photosynthesis ◽  
Maturity Stage ◽  
Comparative Effect ◽  
The Mean ◽  
Chloride Salinity ◽  
Nutrient Solutions ◽  
1000 Grain Weight ◽  
Intercellular Co2

To elucidate the comparative effect of chloride and sulfate salinities on photosynthesis and yield components in rice, plants of Oryza sativa (cv. I Kong Pao (salt-sensitive)) were exposed in nutrient solutions to 20 mM Na2SO4 or 40 mM NaCl (electrical conductivity of c.a. 4.30 dS m−1 for both solutions) from seedlings to maturity stage. Both types of salt induced a strong decrease in net photosynthesis (AN) at the seedling and tillering stages, while the intercellular CO2 concentrations (Ci) remained unaffected. Instantaneous transpiration (E) and stomatal conductance (gs) decreased at the tillering and seedling stages, respectively, only in plants exposed to NaCl. Chloride salinity also strongly decreased photosynthetic pigments, while no impact was detected in response to Na2SO4. All yield-related parameters were affected by salinities, but NaCl was significantly more deleterious than Na2SO4 for the mean number of tillers produced per plant, spikelets sterility and non-viable pollen percentage. In contrast, both types of salinity similarly impacted the percentage of fertile tillers and 1000-grain weight. At the grain level, more than 90% of toxic ions (Na+, excess of Cl− and S6+) accumulated in the hulls, thus preserving the internal part of the caryopses from toxic ion injuries.

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