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
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 5. The effect of 1-aminocyclopropane-1-carboxylic acid (ACC, ethylene precursor) and abscisic acid (ABA) added to the medium of Beta vulgaris fruits (A, C) and seeds (B, D) on the timing of radicle emergence (A, B) and the endogenous contents of ACC, ABA, and indole-3-acetic acid (IAA, auxin) in the seeds (embryo plus perisperm plus testa) (C,D).
The endogenous contents were determined in seeds dissected out of fruits or in 'isolated seeds' at 55 h, i.e. the T50% for the radicle emergence of fruit populations in control medium. The results are presented in pmol (ABA, IAA) or nmol (ACC) per gram DW. Mean values ± SE are presented; radicle emergence scoring, hormone measurements, conditions, and statistics with Tukey's multiple comparison test as in Figs. 3 and 4. (A,B) Means of treatments labeled with asterisks differ significantly from the corresponding controls: *, 0.05 > P > 0.01; **, 0.01 > P > 0.001; ***, P < 0.001. (C,D) Means within each series, means denoted by the same letter do not differ significantly at P < 0.01 (ABA, ACC) or P < 0.05 (IAA).
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