Rice caryopsis structure in relation to distribution of micronutrients (iron, zinc, β-carotene) of rice cultivars including transgenic indica rice

Linkage mapping for grain iron and zinc content in F2population derived from the cross between PAU201 and Palman 579 in rice (Oryza sativaL.)

“…"Palman 579" also had higher iron content (270.3 ± 2.59) in leaf tissue as compared to "PAU201" (127.3 ± 3.15) (data not shown) and consequently recorded higher grain/leaf iron content ratio (1.5, in comparison to 0.59 for PAU201) indicating that "Palman 579" may be equipped with efficient mineral uptake and transport mechanisms. Several factors including grain characteristics (number of aleurone layers, size of the embryo and caryopsis, available levels of the micronutrient at the root-soil interface, genetic systems for mineral uptake by roots, translocation and sequestration of minerals) and phloem sap loading and unloading rates within the reproductive organs, determines the quantity of micronutrients in the grains (Welch and Graham 2004;Sellappan et al 2009). More research is required to understand molecular and biochemical mechanisms for mineral uptake and transport using such novel diverse genotypes.…”

Characterization of 68Zn uptake, translocation, and accumulation into developing grains and young leaves of high Zn-density rice genotype

“…IR68144 (high Zn-density genotype) and IR64 (low Zn-density genotype) were obtained from the International Rice Research Institute, Manila, Philippines. It has been reported that Zn in the unpolished rice grains of IR68144 was about 37.0 mg/kg, whereas much lower Zn (25.5 mg/kg) was recorded in IR64 (Sellappan et al, 2009). Seeds were surface-sterilized by washing with 70% ethanol for 1 min and soaking in 0.01 g/ml sodium hypochlorite for 5 min, rinsed thoroughly in deionized water (resistivity ≥18.2 MΩ·cm), and imbibed in deionized water for 48 h at 30 °C.…”

ESTUDO DOS ÁCIDOS GRAXOS E DAS PROPRIEDADES ANTIOXIDANTES DE ARROZ (Oryza sativa L.) BRUTO, INTEGRAL, PARBOILIZADO E BRANCO COMERCIALIZADOS NO BRASIL E NA ITÁLIA

“…O arroz é um cereal da família das Gramíneas, gênero Oryza consumido mundialmente na África, Oriente Médio e América Latina, no qual o Brasil representa o terceiro maior produtor anual com mais de 12 milhões de toneladas (Sellapan et al, 2009;Conab, 2015).…”