caa a22 4500 606219382 CHVBK 20210128101118.0 cr unu---uuuuu 210128e20151001xx s 000 0 eng 10.1007/s11104-015-2547-9 doi (NATIONALLICENCE)springer-10.1007/s11104-015-2547-9 Cluster roots of Embothrium coccineum (Proteaceae) affect enzyme activities and phosphorus lability in rhizosphere soil [Elektronische Daten] [M. Delgado, A. Zúñiga-Feest, L. Almonacid, H. Lambers, F. Borie] Background and aim: Cluster roots have a profound effect on their rhizosphere. Our aim was to determine the effect of cluster roots of Embothrium coccineum, growing under natural conditions, on soil enzyme activities and phosphorus (P) lability in its rhizosphere. Methods: We determined enzyme activities: acid phosphatase (P-ase), dehydrogenase and β-glucosidase, and the rate of hydrolysis of fluorescein diacetate (FDA), as well as P fractions in the cluster root rhizosphere at different cluster-root developmental stages (juvenile, mature, semi-senescent, senescent), in the non-cluster root rhizosphere, and in bulk soil. In addition, the concentrations of total P and manganese Mn in roots was measured. Results: The rhizosphere of senescing cluster roots presented the highest P-ase, β-glucosidase and dehydrogenase activities, and fastest rate of FDA hydrolysis, being 2.6-, 4.6-, 3.3- and 25.8-fold greater, respectively, than those in the rhizosphere of mature cluster roots. The P fractionation showed that the inorganic P (Pi) fraction was 15% greater in the rhizosphere of mature cluster roots than in that of other stages. Mature cluster roots showed the highest total [P], suggesting the fastest P uptake. Conclusion: Cluster roots of E. coccineum modified their rhizosphere depending on their developmental stage, presenting lower soil enzyme activities at the mature stage than at other development stages. In addition, mature cluster roots increased the Pi fraction in their rhizosphere, allowing the highest total root [P] at this developmental stage. Springer International Publishing Switzerland, 2015 Enzymatic activities nationallicence Phosphorus fractionation nationallicence Volcanic soils nationallicence Southern South America nationallicence Delgado M. Programa de Doctorado en Ciencias de Recursos Naturales, Universidad de la Frontera, Casilla 54-D, Temuco, Chile aut Zúñiga-Feest A. Laboratorio de Biología Vegetal, Instituto de Ciencias Ambientales y Evolutivas, Facultad de Ciencias, Universidad Austral de Chile, Valdivia, Chile aut Almonacid L. Programa de Doctorado en Ciencias de Recursos Naturales, Universidad de la Frontera, Casilla 54-D, Temuco, Chile aut Lambers H. School of Plant Biology, University of Western Australia, 6009, Crawley (Perth), WA, Australia aut Borie F. Center of Amelioration and Sustainability of Volcanic Soil. BIOREN-UFRO, Temuco, Chile aut Plant and Soil Springer International Publishing 395/1-2(2015-10-01), 189-200 0032-079X 395:1-2<189 2015 395 11104 https://doi.org/10.1007/s11104-015-2547-9 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/s11104-015-2547-9 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Delgado M. Programa de Doctorado en Ciencias de Recursos Naturales, Universidad de la Frontera, Casilla 54-D, Temuco, Chile aut NATIONALLICENCE 700 1- Zúñiga-Feest A. Laboratorio de Biología Vegetal, Instituto de Ciencias Ambientales y Evolutivas, Facultad de Ciencias, Universidad Austral de Chile, Valdivia, Chile aut NATIONALLICENCE 700 1- Almonacid L. Programa de Doctorado en Ciencias de Recursos Naturales, Universidad de la Frontera, Casilla 54-D, Temuco, Chile aut NATIONALLICENCE 700 1- Lambers H. School of Plant Biology, University of Western Australia, 6009, Crawley (Perth), WA, Australia aut NATIONALLICENCE 700 1- Borie F. Center of Amelioration and Sustainability of Volcanic Soil. BIOREN-UFRO, Temuco, Chile aut NATIONALLICENCE 773 0- Plant and Soil Springer International Publishing 395/1-2(2015-10-01), 189-200 0032-079X 395:1-2<189 2015 395 11104