caa a22 4500 606218181 CHVBK 20210128101111.0 cr unu---uuuuu 210128e20150301xx s 000 0 eng 10.1007/s11104-014-2329-9 doi (NATIONALLICENCE)springer-10.1007/s11104-014-2329-9 Effects of root iron plaque on selenite and selenate dynamics in rhizosphere and uptake by rice ( Oryza sativa ) [Elektronische Daten] [Qingqing Huang, Qi Wang, Zhang Luo, Yao Yu, Rongfeng Jiang, Huafen Li] Background and aims: Iron plaque commonly forms on rice root surfaces under flooded conditions. However, little is known about the role of iron plaque in Se movement from rhizosphere to plant. A compartmented soil-quartz sand culture system was applied to investigate the effects of iron plaque on Se uptake by rice and document Se speciation dynamics in soil solution under flooded conditions. Methods: Rice seedlings were planted in a nylon bag containing sand and surrounded by soil amended with Se combined at rates of 0 or 0.5mg of Se kg−1 of soil in the form of selenate or selenite. Plants were harvested at seedling stage and at maturity. Fe and Se concentrations in soil solution, in DCB extracts and Se concentrations in rice roots and shoots were determined. Results: A visible reddish coating on root surfaces could be observed when sampled at the seedling stage and at maturity. Iron plaque on root surfaces greatly influenced Se uptake and had a higher affinity for selenite. The distribution of Se in different components of rice seedlings followed iron plaque > shoot > root, while it followed shoot > root > iron plaque at maturity. The addition of Se initially increased the soluble Se concentrations, and selenate was the main species in soil solution. Conclusions: Iron plaque greatly influenced Se uptake and might act as a pool to Se uptake during rice growth. Selenate or selenite addition to paddy soil showed the same effect in increasing Se concentrations in rice grain. Springer International Publishing Switzerland, 2014 Iron plaque nationallicence Selenite nationallicence Selenate nationallicence Rice nationallicence Uptake nationallicence Speciation nationallicence Huang Qingqing Key Laboratory of Plant-Soil Interactions of the Ministry of Education, College of Resources and Environmental Sciences, China Agricultural University, 100193, Beijing, People's Republic of China aut Wang Qi Key Laboratory of Plant-Soil Interactions of the Ministry of Education, College of Resources and Environmental Sciences, China Agricultural University, 100193, Beijing, People's Republic of China aut Luo Zhang Key Laboratory of Plant-Soil Interactions of the Ministry of Education, College of Resources and Environmental Sciences, China Agricultural University, 100193, Beijing, People's Republic of China aut Yu Yao Key Laboratory of Plant-Soil Interactions of the Ministry of Education, College of Resources and Environmental Sciences, China Agricultural University, 100193, Beijing, People's Republic of China aut Jiang Rongfeng Key Laboratory of Plant-Soil Interactions of the Ministry of Education, College of Resources and Environmental Sciences, China Agricultural University, 100193, Beijing, People's Republic of China aut Li Huafen Key Laboratory of Plant-Soil Interactions of the Ministry of Education, College of Resources and Environmental Sciences, China Agricultural University, 100193, Beijing, People's Republic of China aut Plant and Soil Springer International Publishing 388/1-2(2015-03-01), 255-266 0032-079X 388:1-2<255 2015 388 11104 https://doi.org/10.1007/s11104-014-2329-9 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s11104-014-2329-9 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Huang Qingqing Key Laboratory of Plant-Soil Interactions of the Ministry of Education, College of Resources and Environmental Sciences, China Agricultural University, 100193, Beijing, People's Republic of China aut NATIONALLICENCE 700 1- Wang Qi Key Laboratory of Plant-Soil Interactions of the Ministry of Education, College of Resources and Environmental Sciences, China Agricultural University, 100193, Beijing, People's Republic of China aut NATIONALLICENCE 700 1- Luo Zhang Key Laboratory of Plant-Soil Interactions of the Ministry of Education, College of Resources and Environmental Sciences, China Agricultural University, 100193, Beijing, People's Republic of China aut NATIONALLICENCE 700 1- Yu Yao Key Laboratory of Plant-Soil Interactions of the Ministry of Education, College of Resources and Environmental Sciences, China Agricultural University, 100193, Beijing, People's Republic of China aut NATIONALLICENCE 700 1- Jiang Rongfeng Key Laboratory of Plant-Soil Interactions of the Ministry of Education, College of Resources and Environmental Sciences, China Agricultural University, 100193, Beijing, People's Republic of China aut NATIONALLICENCE 700 1- Li Huafen Key Laboratory of Plant-Soil Interactions of the Ministry of Education, College of Resources and Environmental Sciences, China Agricultural University, 100193, Beijing, People's Republic of China aut NATIONALLICENCE 773 0- Plant and Soil Springer International Publishing 388/1-2(2015-03-01), 255-266 0032-079X 388:1-2<255 2015 388 11104