caa a22 4500 606219854 CHVBK 20210128101120.0 cr unu---uuuuu 210128e20150101xx s 000 0 eng 10.1007/s11104-014-2252-0 doi (NATIONALLICENCE)springer-10.1007/s11104-014-2252-0 Sugarcane performance under phosphorus deficiency: physiological responses and genotypic variation [Elektronische Daten] [Fernando Zambrosi, Rafael Ribeiro, Paulo Marchiori, Heitor Cantarella, Marcos Landell] Background and aim: Developing genotypes with enhanced performance under phosphorus (P) deficiency can be described as an approach to improving production sustainability. This study investigated the physiological responses of sugarcane varieties to varying P availability and the plant traits contributing to P efficiency (shoot dry matter production under low P availability). Methods: Sugarcane varieties IACSP94-2101, IACSP95-5000, RB86-7515, IAC91-1099, IACSP94-2094 and IAC87-3396 were grown under low (25mg P kg−1 soil) and high (400mg P kg−1 soil) P supply, and the leaf gas exchange, photochemical activity, plant growth and P uptake were evaluated. Results: The sugarcane varieties responded distinctly to a low P supply, as indicated by differences in root and shoot growth, leaf area, net CO2 assimilation, photosynthetic P utilization efficiency, leaf P concentration and P uptake. The following ranking was obtained for P efficiency: IACSP94-2094 = IACSP95-5000 > IAC87-3396 = RB86-7515 = IACSP94-2101 = IAC91-1099. Conclusion: Greater leaf area, net CO2 assimilation and P acquisition efficiency were combined in the more P-efficient varieties but not in the less efficient ones. Although it was not possible to separate cause and effect, such finding might be explained by the positive effect of improved leaf P concentration on leaf area and net CO2 assimilation, which in turn contributed to sustaining improved plant performance under a low P supply. Springer International Publishing Switzerland, 2014 Nutrient efficiency nationallicence Root growth nationallicence Nutritional stress nationallicence Leaf area nationallicence Photosynthesis nationallicence Saccharum spp nationallicence APA : acid phosphatase activity (μmol p-nitrophenol g−1 of fresh tissue h−1) nationallicence ETR : apparent electron transport rate (μmol m−2 s−1) nationallicence ∆ F / F m' : effective quantum efficiency of photosystem II nationallicence k : instantaneous carboxylation efficiency (μmol m−2 s−1 Pa−1) nationallicence C i : intercellular CO2 concentration (μmol mol−1) nationallicence LA : leaf area (cm2 pot−1) nationallicence R : leaf respiration (μmol m−2 s−1) nationallicence F v/ F m : maximum quantum efficiency of photosystem II nationallicence A N : net CO2 assimilation (μmol m−2 s−1) nationallicence PRUpE : phosphorus root uptake efficiency (μg cm−1) nationallicence q P : photochemical quenching nationallicence PPUE : photosynthetic P use efficiency (μmol mg−1 s−1) nationallicence WUE : photosynthetic water use efficiency (μmol mmol−1) nationallicence PUtE : physiological P utilization efficiency (g mg−1) nationallicence RDM : root dry matter (g pot−1) nationallicence RL : root length (m pot−1) nationallicence SDM : shoot dry matter (g pot−1) nationallicence SRL : specific root length (m g−1) nationallicence g s : stomatal conductance (mol m−2 s−1) nationallicence E : transpiration (mmol m−2 s−1) nationallicence Zambrosi Fernando Centro de Solos e Recursos Ambientais, Instituto Agronômico (IAC), P.O. Box 28, 13012-970, Campinas, SP, Brazil aut Ribeiro Rafael Department of Plant Biology, Institute of Biology, University of Campinas (UNICAMP), P.O. Box 6109, 13083-970, Campinas, SP, Brazil aut Marchiori Paulo Programa de Pós-graduação em Agricultura Tropical e Subtropical, Instituto Agronômico (IAC), P.O. Box 28, 13012-970, Campinas, SP, Brazil aut Cantarella Heitor Centro de Solos e Recursos Ambientais, Instituto Agronômico (IAC), P.O. Box 28, 13012-970, Campinas, SP, Brazil aut Landell Marcos Centro Avançado de Pesquisa Tecnológica do Agronegócio Cana, Instituto Agronômico (IAC), P.O. Box 206, 14001-970, Ribeirão Preto, SP, Brazil aut Plant and Soil Springer International Publishing 386/1-2(2015-01-01), 273-283 0032-079X 386:1-2<273 2015 386 11104 https://doi.org/10.1007/s11104-014-2252-0 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/s11104-014-2252-0 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Zambrosi Fernando Centro de Solos e Recursos Ambientais, Instituto Agronômico (IAC), P.O. Box 28, 13012-970, Campinas, SP, Brazil aut NATIONALLICENCE 700 1- Ribeiro Rafael Department of Plant Biology, Institute of Biology, University of Campinas (UNICAMP), P.O. Box 6109, 13083-970, Campinas, SP, Brazil aut NATIONALLICENCE 700 1- Marchiori Paulo Programa de Pós-graduação em Agricultura Tropical e Subtropical, Instituto Agronômico (IAC), P.O. Box 28, 13012-970, Campinas, SP, Brazil aut NATIONALLICENCE 700 1- Cantarella Heitor Centro de Solos e Recursos Ambientais, Instituto Agronômico (IAC), P.O. Box 28, 13012-970, Campinas, SP, Brazil aut NATIONALLICENCE 700 1- Landell Marcos Centro Avançado de Pesquisa Tecnológica do Agronegócio Cana, Instituto Agronômico (IAC), P.O. Box 206, 14001-970, Ribeirão Preto, SP, Brazil aut NATIONALLICENCE 773 0- Plant and Soil Springer International Publishing 386/1-2(2015-01-01), 273-283 0032-079X 386:1-2<273 2015 386 11104