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Silicon Increases Leaf Chlorophyll Content and Iron Nutritional Efficiency and Reduces Iron Deficiency in Sorghum Plants
Journal of Soil Science and Plant Nutrition ( IF 3.4 ) Pub Date : 2020-03-09 , DOI: 10.1007/s42729-020-00214-0
Gelza Carliane Marques Teixeira , Renato de Mello Prado , Kamilla Silva Oliveira , Victor D’Amico-Damião , Gilmar da Silveira Sousa Junior

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.

中文翻译:

硅可提高高粱植物的叶绿素含量和铁营养效率并减少铁缺乏症

本研究的目的是评估硅 (Si) 对在营养液中生长的高粱植物缺铁 (Fe) 的影响,因为高粱作物对缺铁很敏感,而 Si 可以缓解这种缺铁。尽管如此,在该植物物种中尚未完全阐明这一过程背后的营养机制。在不存在或存在 Si (2 mmol L -1 ) 和 Fe 缺乏或充足的情况下,以 2 × 2 析因方案和完全随机区组设计安排处理,重复五次。Si和Fe的来源分别是稳定的山梨糖醇钠和硅酸钾(Si = 113.4 g L -1 )和Fe-EDDHA螯合物(Fe = 6%)。将植物培养在装满洗过的沙子的盆中,通过营养液以2 mmol L -1 的浓度供应Si。本研究中使用的Fe浓度在充足条件下为368 μmol L -1 ,在缺乏条件下为55.2 μmol L -1 。我们的结果表明,Si 通过增加叶绿素含量和降低丙二醛 (MDA) 的浓度对缺铁条件下的高粱植物产生有益影响。此外,在这种微量营养素缺乏的情况下,Si 的应用提高了植物中 Fe 的易位和利用效率。综上所述,Si通过增加光合色素浓度,减少脂质过氧化,提高Fe转运和利用效率,并导致更大的干重积累,减少了高粱植株的Fe缺乏。我们的结果表明,Si 通过增加叶绿素含量和降低丙二醛 (MDA) 的浓度对缺铁条件下的高粱植物产生有益影响。此外,在这种微量营养素缺乏的情况下,Si 的应用提高了植物中 Fe 的易位和利用效率。综上所述,Si通过增加光合色素浓度,减少脂质过氧化,提高Fe转运和利用效率,并导致更大的干重积累,减少了高粱植株的Fe缺乏。我们的结果表明,Si 通过增加叶绿素含量和降低丙二醛 (MDA) 的浓度对缺铁条件下的高粱植物产生有益影响。此外,在这种微量营养素缺乏的情况下,Si 的应用提高了植物中 Fe 的易位和利用效率。综上所述,Si通过增加光合色素浓度,减少脂质过氧化,提高Fe转运和利用效率,并导致更大的干重积累,减少了高粱植株的Fe缺乏。在微量营养素缺乏的情况下,Si 的应用提高了植物中 Fe 的易位和利用效率。综上所述,Si通过增加光合色素浓度,减少脂质过氧化,提高Fe转运和利用效率,并导致更大的干重积累,减少了高粱植株的Fe缺乏。在这种微量营养素缺乏的情况下,Si 的应用提高了植物中 Fe 的易位和利用效率。综上所述,Si通过增加光合色素浓度,减少脂质过氧化,提高Fe转运和利用效率,并导致更大的干重积累,减少了高粱植株的Fe缺乏。
更新日期:2020-03-09
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