caa a22 4500 445841036 CHVBK 20180317145344.0 cr unu---uuuuu 170323e20110701xx s 000 0 eng 10.1007/s10725-011-9564-3 doi (NATIONALLICENCE)springer-10.1007/s10725-011-9564-3 The effect of root exudates on root architecture in Arabidopsis thaliana [Elektronische Daten] [María Caffaro, Jorge Vivanco, Flavio Gutierrez Boem, Gerardo Rubio] Root architecture is of key importance for plant nutrition and performance. It is known that root architecture is determined by genetics and environmental conditions. The aim of the present study was to evaluate if root exudation within a given plant has a role in the development of root architecture. We conducted a series of experiments using Arabidopsis thaliana Ler and Col grown with and without activated charcoal (AC). The addition of AC lowered the concentration of secondary metabolites in the growth media by more than 90%. Our results consistently showed that the addition of AC significantly decreased the number of lateral roots (38% in Ler and 27% in Col), but this decrease was compensated by an increase in the root length per unit of lateral root (83% in Ler and 96% in Col). This compensation resulted in a non-significant effect of AC on the total length of lateral roots. The effects of AC on root architecture were partially or totally reverted by the differential supplementation of root exudates from other plants of the same ecotype. Our results indicate a direct role of secondary metabolites present in the root exudates in the development of root architecture. Springer Science+Business Media B.V., 2011 Activated charcoal nationallicence Arabidopsis thaliana nationallicence Root architecture nationallicence Root exudates nationallicence Soil exploration nationallicence Caffaro María UBA Facultad de Agronomía, INBA CONICET, Av. San Martín 4453, C1417DSE, Buenos Aires, Argentina aut Vivanco Jorge Center for Rhizosphere Biology, Colorado State University, 80523-1173, Fort Collins, CO, USA aut Gutierrez Boem Flavio UBA Facultad de Agronomía, INBA CONICET, Av. San Martín 4453, C1417DSE, Buenos Aires, Argentina aut Rubio Gerardo UBA Facultad de Agronomía, INBA CONICET, Av. San Martín 4453, C1417DSE, Buenos Aires, Argentina aut Plant Growth Regulation Springer Netherlands 64/3(2011-07-01), 241-249 0167-6903 64:3<241 2011 64 10725 https://doi.org/10.1007/s10725-011-9564-3 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10725-011-9564-3 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Caffaro María UBA Facultad de Agronomía, INBA CONICET, Av. San Martín 4453, C1417DSE, Buenos Aires, Argentina aut NATIONALLICENCE 700 1- Vivanco Jorge Center for Rhizosphere Biology, Colorado State University, 80523-1173, Fort Collins, CO, USA aut NATIONALLICENCE 700 1- Gutierrez Boem Flavio UBA Facultad de Agronomía, INBA CONICET, Av. San Martín 4453, C1417DSE, Buenos Aires, Argentina aut NATIONALLICENCE 700 1- Rubio Gerardo UBA Facultad de Agronomía, INBA CONICET, Av. San Martín 4453, C1417DSE, Buenos Aires, Argentina aut NATIONALLICENCE 773 0- Plant Growth Regulation Springer Netherlands 64/3(2011-07-01), 241-249 0167-6903 64:3<241 2011 64 10725 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer