Journal of Experimental Botany 58: 3047-3060 (2007)

1-Aminocyclopropane-1-carboxylic acid and abscisic acid during the germination of sugar beet (Beta vulgaris L.) - a comparative study of fruits and seeds

Katrin Hermann, Juliane Meinhard, Peter Dobrev, Ada Linkies, Bedrich Pesek, Barbara Heß, Ivana Machácková, Uwe Fischer, Gerhard Leubner-Metzger

Institute of Biology II, Botany / Plant Physiology, Albert-Ludwigs-University Freiburg, Schänzlestr. 1, D-79104 Freiburg i. Br., Germany, Web: 'The Seed Biology Place' http://www.seedbiology.de (K.H., A.L., B.H., G-L.-M.) KWS SAAT AG, Grimsehlstr. 31, D-37555 Einbeck, Germany, Web: http://www.kws.de (J.M., U.F.) Institute of Experimental Botany CAS, Rozvojová 263, CZ-16502 Prague 6, Czech Republic, Web: http://www.ueb.cas.cz/index_eng.htm (P.D., B.P., I.M.) Received June 15, 2007; accepted June 25, 2007

Figure 4. The time course of the endogenous contents of abscisic acid (ABA), 1-aminocyclopropane-1-carboxylic acid (ACC, ethylene precursor), and indole-3-acetic acid (IAA, auxin) in the seed during the germination of Beta vulgaris fruits. The endogenous contents were determined in seeds (embryo plus perisperm plus testa) dissected out of dry fruits and fruits at the times indicated when radicle emergence of the population was 1% (T1%), 50% (T50%), and maximal (Tmax). The seed samples were freeze dried and each yielded ca. 0.3 g in dry weight (DW). The results are presented in pmol (ABA, IAA) or nmol (ACC) per gram DW. Radicle emergence of fruit populations was scored over time; mean values ± SE from three independent experiments each with 4x100 fruits are presented for radicle emergence; mean values ± SE of triplicates of 100 seeds used for the hormone measurements are presented. Conditions and statistics as in Fig. 3; within each series (ABA, ACC, IAA), means denoted by the same letter do not differ significantly at P < 0.01 according to Tukey's multiple comparison test.

Article in PDF format (1.3 MB)    Abstract    Fig. 1               Fig. 2 Fig. 5               Fig. 6 Fig. 3               Fig. 4                Tab. 1 Fig. 7               Suppl. Fig. S1 © Oxford University Press, Oxford Journals Society of Experimental Botany http://jxb.oxfordjournals.org/

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