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Accumulation of copper in brown rice and effect of copper on rice growth and grain yield in different rice cultivars.
Yan, Yu-Ping; He, Jun-Yu; Zhu, Cheng; Cheng, Chang; Pan, Xue-Bo; Sun, Zhong-Yang.
Afiliação
  • Yan YP; State Key Laboratory of Plant Physiology and Biochemistry, Zhejiang University, Hangzhou 310058, China.
Chemosphere ; 65(10): 1690-6, 2006 Dec.
Article em En | MEDLINE | ID: mdl-16844189
ABSTRACT
A pot experiment with 38 commonly cultured rice cultivars showed that the effect of Cu (100 mg kg(-1)) on rice growth, grain yield and accumulation of Cu in brown rice varied greatly with different cultivars. Although the average Cu concentration in brown rice of the 38 cultivars was significantly increased (P<0.01) compared with the control, in none of the cultivars did Cu concentration in brown rice exceed the maximum permissible limit of 10 mg Cu kg(-1). This suggests that rice grown in Cu-contaminated paddy soil (100 mg Cu kg(-1)) will not adversely affect human health through the food chain. Because of the significant negative correlation between grain weight and Cu concentration in brown rice with the soil Cu treatment, screening for cultivars with low Cu accumulation in brown rice and high grain yield for Cu-contaminated areas is feasible. The present research led to the recommendation of three such cultivars Jiahua, Zhenxian 866, Zhe 733. The average grain yield under Cu treatment (100 mg Cu kg(-1) soil) was significantly (P<0.01) reduced compared with the control. The decreases or increases of grain yields mainly resulted from the combined effects of the panicles per pot, spikelets per panicle and filled spikelets per panicle under the soil Cu treatment. Furthermore, there were significant (r=0.869, P<0.01) positive correlations between the RC (relative changes) of spikelets per panicle and filled spikelets per panicle under the soil Cu treatment.
Assuntos
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Base de dados: MEDLINE Assunto principal: Oryza / Poluentes do Solo / Cobre Tipo de estudo: Guideline Idioma: En Ano de publicação: 2006 Tipo de documento: Article
Buscar no Google
Base de dados: MEDLINE Assunto principal: Oryza / Poluentes do Solo / Cobre Tipo de estudo: Guideline Idioma: En Ano de publicação: 2006 Tipo de documento: Article