首页|Introduction of Bacillus thuringiensis(Bt)gene does not reduce potassium use efficiency of Bt transgenic cotton(Gossypium hirsutum L.)
Introduction of Bacillus thuringiensis(Bt)gene does not reduce potassium use efficiency of Bt transgenic cotton(Gossypium hirsutum L.)
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Background:Potassium(K)deficiency has become a common field production problem following the widespread adoption of Bacillus thuringiensis(Bt)transgenic cotton(Gossypium hirsutum L.)worldwide.The purpose of this study was to clarify whether the introduction of Bt gene directly reduces the K-use efficiency of cotton to induce K deficiency.Results:The cotton variety,Jihe 321(wild type,WT)and its two Bt(Cry 1Ac)-transgenic overexpression lines(OE-29317,OE-29312)were studied in field with low soil-test K+(47.8 mg·kg-1).In the field with low soil-test K+,only OE-29317 had less biomass and K+accumulation than the WT at some growth stages.Both Bt lines produced similar or even greater seed cotton yield than WT in the field.When the Btgene(～70％)in OE-29317 and OE-29312 plants was silenced by virus-induced gene silencing(VIGS),the VIGS-Bt plants did not produce more biomass than VIGS-green fluorescent protein(control)plants.Conclusions:The introduction of Btgene did not necessarily hinder the K use efficiency of the cotton lines under this study.
State Key Laboratory of Plant Physiology and Biochemistry/College of Agronomy and Biotechnology,China Agricultural University,No 2 Yuan-mingyuan Xi Lu,Haidian District,Beijing 100193,China
Shanxi Agricultural University/Institute of Cotton Research,Shanxi Academy of Agriculture Science,Yuncheng 044000,Shanxi,China
Department of Soil Science,Faculty of Agriculture,Forestry and Wildlife Resources Management,University of Calabar,Calabar,Nigeria
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