caa a22 4500 397520638 CHVBK 20180308164631.0 cr unu---uuuuu 161202e199507 xx s 000 0 eng 10.1093/jxb/46.7.841 doi (NATIONALLICENCE)oxford-10.1093/jxb/46.7.841 Uptake and distribution of 65Zn and 54Mn in wheat grown at sufficient and deficient levels of Zn and Mn II. During grain development [Elektronische Daten] [J.N. Pearson, Z. Rengel] We investigated the uptake and distribution of Zn and Mn in wheat during grain development. Plants were grown in a chelate-buffered nutrient solution with one of the following treatments: control, low Zn or low Mn. Plants were dual-labelled with 65Zn and 54Mn at 2 and 8 wk post-anthesis for 5 and 24 h, respectively. After labelling, the plants were separated into individual components for analysis. In the plants harvested at 8 wk after anthesis, spikelets were separated into individual structures and analysed for radioactivity. Little or no root-supplied 54Mn was distributed to the leaves of both the controls and low-Mn plants during the grain development stages studied here. More 54Mn was distributed to the head at 8 wk than at 2 wk post-anthesis. In contrast, root-supplied 65Zn was transported to the leaves at 2 and 8 wk post-anthesis.More 65Zn was distributed to the leaves of the low-Zn plants than the controls during grain development.More esZn was detected in the head towards grain maturity. Relatively larger amounts of 54Mn than 65Zn were found in different parts of the florets. Labelled Mn was found in relatively large quantities in the palea, lemma and in the glumes, even though most 54Mn was found in the grain. A large percentage of the grain MMn was in the outer pericarp. During grain development leaves may still require Zn but not Mn, which may be due to the requirement of Zn in maintaining membrane structure and function. Distribution of Zn and Mn within the spikelets suggests that Zn may enter the grain via the phloem while Mnmay enter the grain via the xylem. © Oxford University Press Research Papers nationallicence Zinc nationallicence manganese nationallicence nutrient transport nationallicence grain development nationallicence wheat nationallicence Triticum aestivum nationallicence Pearson J.N. Department of Plant Science, Waite Agricultural Research Institute, The University of Adelaide, Glen Osmond, SA 5064, Australia aut Rengel Z. Department of Plant Science, Waite Agricultural Research Institute, The University of Adelaide, Glen Osmond, SA 5064, Australia aut Journal of Experimental Botany Oxford University Press 46/7(1995-07), 841-845 0022-0957 46:7<841 1995 46 exbotj https://doi.org/10.1093/jxb/46.7.841 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1093/jxb/46.7.841 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Pearson J.N. Department of Plant Science, Waite Agricultural Research Institute, The University of Adelaide, Glen Osmond, SA 5064, Australia aut NATIONALLICENCE 700 1- Rengel Z. Department of Plant Science, Waite Agricultural Research Institute, The University of Adelaide, Glen Osmond, SA 5064, Australia aut NATIONALLICENCE 773 0- Journal of Experimental Botany Oxford University Press 46/7(1995-07), 841-845 0022-0957 46:7<841 1995 46 exbotj Metadata rights reserved CC BY-NC-4.0 http://creativecommons.org/licenses/by-nc/4.0 nationallicence SWISSBIB 397520638 BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-oxford