Iron (Fe) is an essential nutrient for plant metabolic processes such as respiration and photosynthesis. One of the major abiotic stresses that affect irrigated rice production and expansion is iron toxicity. In this scenario, Brazil, where rice cultivation represents an important economic activity, is the largest rice producer in the Western hemisphere. Rice ( Oryza sativa L.) is an important cereal used to feed more than two-thirds of the worlds population, being the source of more than 20% of the calories consumed by humankind.
Results show that genotypes scored as sensitive present higher concentration of Fe in shoots and this is an efficient method to characterize rice cultivars regarding iron response. Strong positive correlations were found here for Fe × Zn (0.93) Fe × Mn (0.97) and Zn × Mn (0.92), probably due to the Fe-induced activation of bivalent cation transporters. Fe stress at a lower concentration than 7 mM increased Zn but decreased Mn contents in shoots of BR-IRGA 409. On the other hand, an increase was seen for Zn and Mn when shoots are subjected to Fe 2+ excess. No changes in shoot Cu content can be observed when comparing treatments. BR-IRGA 410 displayed an intermediate phenotype regarding iron accumulation. The sensitive genotypes Nipponbare and BR-IRGA 409 indicated higher accumulation of iron in their tissues while BRS-Agrisul and Epagri 108 also accumulated iron, but at lower concentrations. Resultsīased on the experiments, iron excess leads to reduction in shoot length (SL) and this can be a useful characteristic for adequate screening of tolerant genotypes. Iron poisoning in dogs can range in severity of signs from vomiting, bloody diarrhea, lethargy, and abdominal pain to more severe signs of shock, tremors, and potential cardiac and liver effects.This study was conducted to establish a method for early, quick and cheap screening of iron excess tolerance in rice ( Oryza sativa L.) cultivars. When in doubt, have a medical professional at Pet Poison Helpline assist you with finding out if the amount ingested was toxic or not. As iron comes in several sources, the amount of elemental iron versus “total” iron must be calculated out to see if it is a poisonous ingestion or not. When ingested in poisonous amounts, iron can be very toxic. Sources of iron include fertilizers, multivitamins (particularly prenatal vitamins), dietary mineral supplements, some types of hand warmers, and oxygen absorbers (small sachets found in food items like beef jerky, rawhide bags, etc.). Iron is a chemical element that is commonly found in multiple sources around the house, garden, and yard.
0 kommentar(er)
