《Table 4–Se use efficiency in seeds and plants of common buckwheat during the growing period in 2015

  提示：宽带有限、当前游客访问压缩模式

本系列图表出处文件名：随高清版一同展现

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

1. 获取 高清版本忘记账户？点击这里登录

1. 下载图表忘记账户？点击这里登录

CK，without Se application；Se（IV），selenite；Se（VI），selenate；1/2 Se（IV+VI），combination of selenite and selenate.Different letters indicate significant differences（P<0.05）between the treatments.

With respect to Se translocation in common buckwheat，a marked increase in TF during the growth period was observed in plants treated with selenate，followed by treatment with the combination of selenite and selenate，whereas plants supplemented with only selenite showed an inverse trend in TF values over the growing season.Plants absorb and translocate selenate via sulfur transporters，and selenate is further metabolized in leaves[34]；these factors may account for the high TF values of plants with selenate supplementation.There could also be a difference in translocation efficiency between selenate and selenite owing to the type of transporters involved[15].Li et al.[35]also reported selenate was translocated to shoots immediately after absorption but that selenite tended to be converted into other organic forms of Se and be stored in the root，explaining the low TF values of selenite-treated plants observed in our study.However，TF values in Se（VI）-treated plants were more than twice those of plants treated with 1/2 Se（IV+VI），suggesting that selenite supplementation might inhibit the translocation of total Se from root to shoot when selenite and selenate interact.Also，a reduction in Se use efficiency was observed in both study years when the plants matured（i.e.，DAS75）（Table 4） .These results were comparable with those of a previous study[27]，suggesting that most Se applied was retained in the soil environment or volatilized to the atmosphere.The decrease in Se use efficiency may also have been due to an initially high Se uptake rate，which depleted Se in the soil，limiting its availability during the growth period.