%0 Journal Article
%T Ameliorating effect of potassium on iron toxicity in hybrid rice<br>钾减轻杂交稻铁毒
%A LI Hua
%A YANG Xiao-e
%A LUO An-cheng
%A <br>李华
%A 杨肖娥
%A 罗安程
%J 浙江大学学报(农业与生命科学版)
%D 2001
%I Zhejiang University Press
%X Toxicity of Fe2+ has been a constraint to lowland rice production, potassium has the ameliorating effect on Fe2+ toxicity .Hybrid rice (Oryza sativa L.) were grown in nutrient solution with three K supplies (0.26, 0.51 and 1.02 mmol/L) and five Fe2+ levels (0.09, 0.18, 0.36, 0.54, and 0.90 mmol/L). Excessive Fe2+ greatly decreased root and shoot dry weights, root length, and shoot height of the hybrid rice, and this depression was obvious even at relatively low Fe2+ levels (above 0.18 mmol/L). Excessive Fe2+ levels notably influenced morphological parameters and concentrations of K, P, and N in the plants. High K supplies ameliorated the negative effects of higher Fe2+, as indicated by increases in biomass and nutrient contents. Proper K supply reduced translocation of Fe2+ from roots to shoots, especially to the upper leaves. Phosphorus, which is antagonistic to Fe2+, was significantly increased by K supply. Ameliorating effects of K may be attributed to the antagonistic effect of K on Fe absorption and translocation to shoots, especially to upper leaves, and to the improvement of plant nutritional status.
%K 钾
%K 铁毒
%K 杂交稻
%K 营养液培养法
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=03F54A49DE00578AA0E5DDF5BC021AA7&cid=298920A27C9BAA22346FCA384240FAA4&jid=466C05D88593309B3EB5CF34361E6426&aid=81B93C8688FEADEC&yid=14E7EF987E4155E6&vid=DB817633AA4F79B9&iid=38B194292C032A66&sid=0F7768518993EDDE&eid=7ABC4505E3960D2B&journal_id=1008-9209&journal_name=浙江大学学报(农业与生命科学版)&referenced_num=1&reference_num=10