Differences in photosynthetic behaviour and leaf senescence of soybean (Glycine max [L.] Merrill) dependent on N2 fixation or nitrate supply

Plant Biology
G KaschukT W Kuyper

Abstract

Biological N(2) fixation can fulfil the N demand of legumes but may cost as much as 14% of current photosynthate. This photosynthate (C) sink strength would result in loss of productivity if rates of photosynthesis did not increase to compensate for the costs. We measured rates of leaf photosynthesis, concentrations of N, ureides and protein in leaves of two soybean cultivars (Glycine max [L.] Merrill) differing in potential shoot biomass production, either associated with Bradyrhizobium japonicum strains, or amended with nitrate. Our results show that the C costs of biological N(2) fixation can be compensated by increased photosynthesis. Nodulated plants shifted N metabolism towards ureide accumulation at the start of the reproductive stage, at which time leaf N concentration of nodulated plants was greater than that of N-fertilized plants. The C sink strength of N(2) fixation increased photosynthetic N use efficiency at the beginning of plant development. At later stages, although average protein concentrations were similar between the groups of plants, maximum leaf protein of nodulated plants occurred a few days later than in N-fertilized plants. The chlorophyll content of nodulated plants remained high until the pod-filling...Continue Reading

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Citations

Apr 9, 2013·Journal of Experimental Botany·Iker AranjueloGorka Erice
Apr 6, 2012·Plant Physiology and Biochemistry : PPB·Veronica A Duran, Christopher D Todd
Sep 10, 2014·Plant Biotechnology Journal·Jitender SinghMalireddy K Reddy
Jan 1, 2014·Journal of Integrative Plant Biology·Bangwei ZhouJosé Luis Araus
Jun 12, 2012·Plant Science : an International Journal of Experimental Plant Biology·M Laura FiasconaroM Carmen Antolín
May 10, 2013·Plant Signaling & Behavior·Paul J Zwack, Aaron M Rashotte
Oct 24, 2014·Frontiers in Plant Science·Sonia OsorioAlisdair R Fernie
Oct 16, 2018·Journal of Basic Microbiology·Dáfila Dos Santos Lima FagottiMariangela Hungria
Jan 14, 2016·AMB Express·Josiane FukamiMariangela Hungria
Dec 21, 2019·International Journal of Nursing Practice·Emine ŞenyuvaGülbeyaz Can
Mar 20, 2020·Journal of Experimental Botany·Sandi Win ThuMechthild Tegeder
Apr 28, 2020·Journal of Experimental Botany·Cristobal Concha, Peter Doerner
Jul 23, 2018·Journal of Experimental Botany·Christer JanssonTodd Mockler
Aug 7, 2017·Archives of Microbiology·Josiane FukamiMariangela Hungria
May 6, 2021·International Journal of Molecular Sciences·Oluwaseun Olayemi AlukoHaobao Liu
Jul 20, 2017·Plant, Cell & Environment·Anne V Brown, Karen A Hudson

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