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Performance of common buckwheat(Fagopyrum esculentum M.) supplied with selenite or selenate for selenium biofortification in northeastern China

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The Crop Journal 2018年第4期6卷 386-393页

作者： Ying Jiang Xiaomin Feng Yadong Yang Xiangxue Qi Yongfeng Ren Youhui Gao Weidong Liu Yuegao Hu Zhaohai Zeng College of Agronomy and Biotechnology China Agricultural University Institute of Crop Sciences Chinese Academy of Agricultural Sciences/Key Laboratory of Crop Physiology and Ecology Ministry of Agriculture

selenium(se)deficiency commonly occurs in soils of northeastern China and leads to insufficient se intake by humans.A two-year field study of se biofortification of common buckwheat supplied with 40 g se ha^(-1)as selenite(se(IV)),selenate(se(VI)),or a combination(1/2 se(IV+VI))was performed to investigate se accumulation and translocation in plants and determine the effects of different forms of se on the grain yield,biomass production,and se use efficiency of plants and *** application increased seed se concentrations to 47.1–265.1μg kg^(-1).seed se concentrations following se(VI)or 1/2 se(IV+VI)treatment exceeded 100μg kg^(-1),an amount suitable for crop se *** concentration in shoots and roots decreased with plant development,and se translocation from root to shoot in se(IV)-treated plants was lower than that in plants treated with 1/2 se(IV+VI)and se(VI).Both grain yield and biomass production increased under 1/2 se(IV+VI)treatment,with grain yields reaching 1663.8 and 1558.5 kg ha^(-1)in 2015 and 2016,respectively,reflecting increases of 11.0% and 10.3% over those without se *** se use efficiency of seeds and plants under se(VI)treatment was significantly higher than those under 1/2 se(IV+VI)and se(IV)***,application of selenate could result in higher se accumulation in buckwheat seeds than application of the other se sources,but the combined application of selenate and selenite might be an alternative approach for improving buckwheat grain yield by se biofortification in northeastern China.

关键词： Common buckwheat se uptake se accumulation se translocation se biofortification

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Difference in selenium accumulation in Shoots of Two Rice Cultivars

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Pedosphere 2006年第5期16卷 646-653页

作者： ZHANG Lian-He SHI Wei-Ming WANG Xiao-Chang State Key Laboratory of Soil and Sustainable Agriculture Institute of Soil Science Chinese Academy of SciencesNanjing 210008 （China） Agricultural College Henan University of Science and Technology Luoyang 471003 （China） Department of Tea Science Zhejiang University Hangzhou 310029 （China）

Two japonica rice （Oryza sativa L.） cultivars, Xiushui 48 and S. Andrea, differing in their ability to accumulate se in the grain （as high as a three-fold difference）, were compared for selenium （se） accumulation in their shoots when their growth media was supplied with different forms of se. Results indicated that when treated with 0.25μmol L^-1 Na2seO3, Xiushui 48 accumulation of se in the shoots was significantly more rapid （P〈0.05） than S. Andrea, probably because of greater se uptake and transport in Xiushui 48. Xiushui 48 rice seedlings had a higher shoot-se accumulation rate and absorbed selenocysteine （se-Cys） more rapidly than S. Andrea seedlings. However, when treated with se as 0.25μmol L^-1 selenomethionine （se-Met）, the S. Andrea seedlings＇ accumulation rate was significantly greater （P〈0.05） than that of Xiushui 48. Possibly, the high se accumulation rate of Xiushui 48 seedling shoots compared to S. Andrea shoots was the result of a higher capacity of Xiushui 48 to transform selenite to organic se compounds and a higher selenite uptake rate.

关键词： rice cultivars se accumulation selenite transport uptake rate

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