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《Journal of Anhui Agricultural Sciences》 2008-12
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Effect of Copper on the Growth,Photosynthesis and Mineral Content in Amaranth

CHEN Hong-hui et al(School of Life Science,Taizhou University,Linhai,Zhejiang 317000)  
[Objective] The aim was know about the inhibition effect of copper on plant growth.[Method] In the pot experiment,with amaranth variety red amaranth was tested material,CuSO4 solution was added for 4 times separately to make the copper concn.in soil reach 4.0 mmol/kg.The effects of copper treatment on the growth,photosynthesis and mineral content of amaranth were studied.[Result] After the 18-day old amaranth seedlings were treated with 4.0 mmol/kg copper for 7 d,the expansion of leaf was inhibited significantly.Although the copper accumulation amount in the 3rd pair of leaves(TL) was higher than that in the 2nd pair of leaves(SL),the decrease degree of photosynthetic rate in TL was lower than that in SL.After treatment with copper,leaf became weak sink due to the slowing of its expansion speed,the starch and sucrose accumulated in leaf and made feedback inhibition on photosynthesis,but the sugar content in roots changed little.Copper mainly accumulated in roots,the excessive copper affected the adsorption and upward transportation of minerals such as calcium,potassium and magnesium in amaranth,so the distribution of minerals in amaranth was affected significantly.[Conclusion] Copper treatment caused the adsorption of mineral nutrients in amaranth to be unbalance and reduced their upward transportation amount.
【Fund】: 浙江省自然科学基金资助项目(Y504256);; 浙江省新苗人才计划资助项目(2007R40G2170047)
【CateGory Index】: S636.4
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