caa a22 4500 605518041 CHVBK 20210128100723.0 cr unu---uuuuu 210128e20150401xx s 000 0 eng 10.1007/s00572-014-0604-5 doi (NATIONALLICENCE)springer-10.1007/s00572-014-0604-5 Post-anthesis N and P dynamics and its impact on grain yield and quality in mycorrhizal barley plants [Elektronische Daten] [Maria Criado, Flavio H. Gutierrez Boem, Irma Roberts, Carla Caputo] An essential goal for modern agriculture is the simultaneous improvement of productivity efficiency and nutrient use efficiency. One way to achieve this goal in crops is to enhance nitrogen (N) and phosphorus (P) acquisition through the mycorrhizal association. This study examined the effect of mycorrhization on post-anthesis N and P dynamics and its impact on grain yield and quality in barley. In addition, the efficiency of both N and P utilization and remobilization was evaluated. With those purposes, barley plants inoculated or not with Rhizophagus intraradices were grown in a soil poor in N and P under greenhouse conditions. Inoculation with R. intraradices in barley enhanced both N and P content in grain and vegetative tissue and reduced phloem amino acid export rate. On the other hand, both N and P vegetative tissue content and phloem amino acid and P export rates decreased during grain filling, whereas N and P grain content increased in both treatments according to the senescence process. However, whereas N grain concentration decreased during grain filling, P grain concentration did not vary, thus suggesting a differential regulation on grain filling. Inoculation with R. intraradices improved the yield and grain quality, thus demonstrating that inoculation with R. intraradices in barley is beneficial, but mycorrhization caused a diminution in nutrient utilization efficiency. As the phloem remobilization rate of amino acids and P did not decrease during grain filling in R. intraradices-inoculated plants compared to non-inoculated ones, these results suggest that nutrient utilization efficiency is most probably regulated by sink strength rather by a mycorrhizal effect. Springer-Verlag Berlin Heidelberg, 2014 Mycorrhiza nationallicence Barley nationallicence Post-anthesis N and P dynamics nationallicence Phloem nationallicence Nutrient utilization efficiency nationallicence Grain yield and quality nationallicence Criado Maria Instituto de Investigaciones en Biociencias Agrícolas y Ambientales (INBA)-CONICET, Facultad de Agronomía, Universidad de Buenos Aires, Av. San Martín 4453, C1417DSE, Buenos Aires, Argentina aut H. Gutierrez Boem Flavio Instituto de Investigaciones en Biociencias Agrícolas y Ambientales (INBA)-CONICET, Facultad de Agronomía, Universidad de Buenos Aires, Av. San Martín 4453, C1417DSE, Buenos Aires, Argentina aut Roberts Irma Instituto de Investigaciones en Biociencias Agrícolas y Ambientales (INBA)-CONICET, Facultad de Agronomía, Universidad de Buenos Aires, Av. San Martín 4453, C1417DSE, Buenos Aires, Argentina aut Caputo Carla Instituto de Investigaciones en Biociencias Agrícolas y Ambientales (INBA)-CONICET, Facultad de Agronomía, Universidad de Buenos Aires, Av. San Martín 4453, C1417DSE, Buenos Aires, Argentina aut Mycorrhiza Springer Berlin Heidelberg 25/3(2015-04-01), 229-235 0940-6360 25:3<229 2015 25 572 https://doi.org/10.1007/s00572-014-0604-5 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/s00572-014-0604-5 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Criado Maria Instituto de Investigaciones en Biociencias Agrícolas y Ambientales (INBA)-CONICET, Facultad de Agronomía, Universidad de Buenos Aires, Av. San Martín 4453, C1417DSE, Buenos Aires, Argentina aut NATIONALLICENCE 700 1- H. Gutierrez Boem Flavio Instituto de Investigaciones en Biociencias Agrícolas y Ambientales (INBA)-CONICET, Facultad de Agronomía, Universidad de Buenos Aires, Av. San Martín 4453, C1417DSE, Buenos Aires, Argentina aut NATIONALLICENCE 700 1- Roberts Irma Instituto de Investigaciones en Biociencias Agrícolas y Ambientales (INBA)-CONICET, Facultad de Agronomía, Universidad de Buenos Aires, Av. San Martín 4453, C1417DSE, Buenos Aires, Argentina aut NATIONALLICENCE 700 1- Caputo Carla Instituto de Investigaciones en Biociencias Agrícolas y Ambientales (INBA)-CONICET, Facultad de Agronomía, Universidad de Buenos Aires, Av. San Martín 4453, C1417DSE, Buenos Aires, Argentina aut NATIONALLICENCE 773 0- Mycorrhiza Springer Berlin Heidelberg 25/3(2015-04-01), 229-235 0940-6360 25:3<229 2015 25 572