Estudos sobre a nutrição mineral do sorgo granífero: V. efeitos das deficiências de micronutrientes (nota)

Malavolta, E.; Accorsi, Walter Radamés; Oliveira, G.D. de; Silva, A.Q. da; Silva, H.; Queiroga, E.G.; Felício, João Carlos; Nogueira, Francisco Dias; Jaha, P.A.; Guiudice, R.M. Del; Assis, V.L..G; Cardoso, Abmael da Silva; Ribeiro, Ailton; Kato, Aki; Cordeiro, Deibity Alves; Aguirre, Ana; Caetano, Anderson; Garcia, C.L.C.

doi:10.1590/s0071-12761977000100025

Cited by 2 publications

(1 citation statement)

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“…Sorghum (Sorghum bicolor L.) crop is a cereal of economic importance worldwide and is cultivated from temperate to tropical regions (Huang 2018). However, sorghum plants are sensitive to Fe deficiency (Malavolta et al 1977). In this sense, specific information for mitigation of the effects of ferric deficiency is still needed to increase Fe nutritional efficiency and to favor sorghum growth.…”

Section: Introductionmentioning

confidence: 99%

Silicon Increases Leaf Chlorophyll Content and Iron Nutritional Efficiency and Reduces Iron Deficiency in Sorghum Plants

Teixeira

Prado

Oliveira

et al. 2020

J Soil Sci Plant Nutr

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The objective of this study was to evaluate the effect of silicon (Si) on iron (Fe) deficiency in sorghum plants grown in a nutrient solution, seeing that sorghum crops are sensitive to iron deficiency and Si may alleviate this deficiency. Nonetheless, the nutritional mechanisms underlying this process have not been fully elucidated in this plant species. Treatments were arranged in a 2 × 2 factorial scheme and completely randomized block design, in the absence or presence of Si (2 mmol L −1) and under Fe deficiency or sufficiency, with five repetitions. The sources of Si and Fe were stabilized sorbitol sodium and potassium silicate (Si = 113.4 g L −1) and Fe-EDDHA chelate (Fe = 6%), respectively. The plants were cultured in pots filled with washed sand, and Si was supplied via nutrient solution at a concentration of 2 mmol L −1. The concentrations of Fe used in this study were 368 μmol L −1 for sufficiency conditions and 55.2 μmol L −1 for deficiency conditions. Our results showed that Si has a beneficial effect on sorghum plants under Fe deficiency by increasing the chlorophyll content and decreasing concentration of malondialdehyde (MDA). In addition, the application of Si increased the efficiency of translocation and utilization of Fe in plants under this micronutrient deficiency. In conclusion, Si reduced Fe deficiency in sorghum plants by increasing the concentration of photosynthetic pigments, reducing lipid peroxidation, improving the efficiency of Fe translocation and utilization, and resulting in a greater dry weight accumulation.

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Section: Introductionmentioning

confidence: 99%