Abstract: Pot experiment was conducted to study the Se bioaccumulation in peanut (Arachis hypogaea L. ). The results are as follows: 1 ) The Se content, process of bioaccumulation and reserves in peanut all showed dynamic changes with plant growth. 2) Peanut could accumulate more Se after needling stage compared with the early stages, 55 % of total Se was enriched after fruiting. 3) Setended to distribute in the most actively growing organs at every growth stage. Before needling stage leaf was the main organ of Se accumulation and storage, but after that peanut pods became the main Se-accumulating and storing organ. At maturity, the total Se reserves in different parts of peanut followed the order: kernel > leaf > shell > stem > root, while the Se content in different organs had a trend of kernel > root > shell > stem > leaf.

Key words: Se, Peanut, Uptake, Accumulation, Dynamics