caa a22 4500 606217509 CHVBK 20210128101108.0 cr unu---uuuuu 210128e20150701xx s 000 0 eng 10.1007/s11104-015-2462-0 doi (NATIONALLICENCE)springer-10.1007/s11104-015-2462-0 The effect of impedance to root growth on plant architecture in wheat [Elektronische Daten] [Kemo Jin, Jianbo Shen, Rhys Ashton, Rodger White, Ian Dodd, Andrew Phillips, Martin Parry, William Whalley] Background and aims: We were interested in the effect of impedance to root growth on root and shoot architecture of wheat. It is known that Rht-1 semi-dwarfing alleles decrease the degree of leaf stunting due to root impedance. We compared commercial wheat cultivars containing different Rht-1 alleles to determine whether leaf stunting caused by root impedance differed between cultivars. We investigated effects of impedance to root growth on the angular spread of roots. Methods: The wheat cultivars Avalon, Robigus and Battalion, carrying semi-dwarfing alleles of Rht-1, and cv. Cadenza, carrying the tall, wild-type allele, were grown under two levels of soil strength in a sand culture system designed to allow the mechanical impedance of the root growth environment to be adjusted independently of water and nutrient availability. Results: Impeded roots grew more steeply than non-impeded roots: the angular spread of roots decreased from 55° to 43° from the vertical, but the genotypic effects were weak. Root impedance reduced leaf elongation and the number of tillers. Leaf area and total root length provided a common relationship across all genotype x treatment combinations. Leaf stunting in Cadenza was more severe. Conclusion: Our data support the hypothesis that the severity of leaf stunting due to root impedance is related to the Rht allele. Impeded roots had a smaller angular spread. The Author(s), 2015 Root impedance nationallicence Leaf elongation nationallicence Root growth angle nationallicence Rht alleles nationallicence Jin Kemo Department of Plant Nutrition, College of Resource and Environmental Sciences, China Agricultural University, 100193, Beijing, China aut Shen Jianbo Department of Plant Nutrition, College of Resource and Environmental Sciences, China Agricultural University, 100193, Beijing, China aut Ashton Rhys Rothamsted Research, West Common, AL5 2JQ, St Albans, Harpenden, UK aut White Rodger Rothamsted Research, West Common, AL5 2JQ, St Albans, Harpenden, UK aut Dodd Ian The Lancaster Environment Centre, Lancaster University, LA1 4YQ, Lancaster, UK aut Phillips Andrew Rothamsted Research, West Common, AL5 2JQ, St Albans, Harpenden, UK aut Parry Martin Rothamsted Research, West Common, AL5 2JQ, St Albans, Harpenden, UK aut Whalley William Rothamsted Research, West Common, AL5 2JQ, St Albans, Harpenden, UK aut Plant and Soil Springer International Publishing 392/1-2(2015-07-01), 323-332 0032-079X 392:1-2<323 2015 392 11104 https://doi.org/10.1007/s11104-015-2462-0 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/s11104-015-2462-0 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Jin Kemo Department of Plant Nutrition, College of Resource and Environmental Sciences, China Agricultural University, 100193, Beijing, China aut NATIONALLICENCE 700 1- Shen Jianbo Department of Plant Nutrition, College of Resource and Environmental Sciences, China Agricultural University, 100193, Beijing, China aut NATIONALLICENCE 700 1- Ashton Rhys Rothamsted Research, West Common, AL5 2JQ, St Albans, Harpenden, UK aut NATIONALLICENCE 700 1- White Rodger Rothamsted Research, West Common, AL5 2JQ, St Albans, Harpenden, UK aut NATIONALLICENCE 700 1- Dodd Ian The Lancaster Environment Centre, Lancaster University, LA1 4YQ, Lancaster, UK aut NATIONALLICENCE 700 1- Phillips Andrew Rothamsted Research, West Common, AL5 2JQ, St Albans, Harpenden, UK aut NATIONALLICENCE 700 1- Parry Martin Rothamsted Research, West Common, AL5 2JQ, St Albans, Harpenden, UK aut NATIONALLICENCE 700 1- Whalley William Rothamsted Research, West Common, AL5 2JQ, St Albans, Harpenden, UK aut NATIONALLICENCE 773 0- Plant and Soil Springer International Publishing 392/1-2(2015-07-01), 323-332 0032-079X 392:1-2<323 2015 392 11104