biologia plantarum

International journal on Plant Life established by Bohumil Němec in 1959

Biologia plantarum 50:581-585, 2006 | DOI: 10.1007/s10535-006-0091-4

Changes in abscisic acid and flower pigments during floral senescence of petunia

A. Ferrante1,*, P. Vernieri2, F. Tognoni2, G. Serra3
1 Department of Crop Science, University of Milan, Milan, Italy
2 Department of Crop Biology, University of Pisa, Pisa, Italy
3 Sant'Anna School of Advanced Studies, Pisa, Italy

The present work was focused on abscisic acid (ABA) changes in three differently coloured petunias during flower development and senescence. The ABA content was studied in correlation with changes of flower pigments and other phytohormones. The variations of anthocyanins and endogenous hormones were induced by treatments with 1 or 2 mM amino-oxyacetic acid (AOA), 50, 100 μM thidiazuron (TDZ) and 50 μM 6-benzyladenine (BA). ABA content decreased during bud development and increased during senescence. The AOA reduced the anthocyanins content and avoided ABA increase, while the cytokinins (BA and TDZ) did not significantly affected anthocyanin contents but increased ABA content. TDZ doubled the ABA content compared to the control. However, the treatments did not affected flower life, confirming the secondary role of ABA during flower senescence.

Keywords: anthocyanins; amino-oxyacetic acid; benzyladenine; carotenoids; cytokinins; Petunia × hybrida; thidiazuron
Subjects: abscisic acid (ABA); amino-oxyacetic acid; anthocyanins; carotenoids; cytokinins; flowering; petunia; Petunia × hybrida; senescence, floral; thidiazuron (TDZ)

Received: December 15, 2004; Accepted: June 10, 2005; Published: December 1, 2006  Show citation

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Ferrante, A., Vernieri, P., Tognoni, F., & Serra, G. (2006). Changes in abscisic acid and flower pigments during floral senescence of petunia. Biologia plantarum, 50(4), 581-585. doi: 10.1007/s10535-006-0091-4
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