Effects of silicon on the growth, nutrient uptake and cadmium accumulation of tomato seedlings
文献类型: 外文期刊
作者: Zhang, Zejin 1 ; Wang, Liming 1 ; Lei, Xiaokui 3 ; Tang, Li 1 ; Li, Yuejian 2 ;
作者机构: 1.Sichuan Acad Agr Sci, Hort Res Inst, Vegetable Germplasm Innovat & Variety Improvement, Chengdu, Sichuan, Peoples R China
2.Sichuan Acad Agr Sci, Key Lab Hort Crop Biol & Germplasm Enhancement So, Minist Agr, Chengdu, Sichuan, Peoples R China
3.Sichuan Acad Agr Sci, Chengdu, Sichuan, Peoples R China
关键词: Silicon; cadmium; tomato seedlings; growth; nutrient uptake
期刊名称:INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY ( 影响因子:2.826; 五年影响因子:2.215 )
ISSN: 0306-7319
年卷期:
页码:
收录情况: SCI
摘要: Tomato plant (Solanum lycopersium Mill.) is among the highly cultivated vegetable crops worldwide. With the increase in cadmium (Cd)-polluted area, the risk of tomato safe production has increased. Therefore,ahydroponic experiment was conducted to study the effects of silicon (Si) on the growth, nutrient uptake and Cd accumulation of tomato seedlings. Tomato seedlings were grown in Yamazaki's nutrient solutionwith fourdifferent Cd levels (0.5, 1, 2 and 3 mg/L) along with four Si treatment levels (0, 1, 2 and 3 mmol/L). The results showed that the addition of Si improved the growth and activities of antioxidant enzymes (SOD and CAT) as well as the nutrient uptake (Ca, Mg, Fe, Mn and Zn) of tomato seedlings under different Cd exposure levels compared to Cd treatment alone. The addition of Si decreased the Cd content in the roots and shoots of tomato seedlings, and the Cd content in the roots and shoots was lowest when the Si concentration was 3 mmol/L. In conclusion, the negative effect of Cd on the growth of tomato seedlings was alleviated by Si-induced increases in biomass, activities of antioxidant enzymes and nutrient uptake and inhibition of Cd uptake.
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