Physiologia Plantarum 86: 495-501 (1992)

Hydroxycinnamoylputrescines are not causally involved in the tuberization process in potato plants

Gerhard Leubner-Metzger and Nikolaus Amrhein

Institute of Plant Sciences, Plant Biochemistry and Physiology, Swiss Federal Institute of Technology, Sonneggstr. 5, CH-8092 Zürich, Switzerland

Received: 28 July 1992

Fig. 1 tuberization Figure 1. Total endogenous levels of feruloylputrescine (FP) (upper panel) and caffeoylputrescine (CP) (lower panel) in µmol (g dry weight)-1 during the dark incubation period of the in vitro minituber cultures of S. tuberosum ssp. andigena 482W.

Series with 240 mM sucrose in the MS-medium: no addition (control) ( FP,  CP), addition of 22 µM BAP (+BAP) ( FP,  CP), addition of 22 µM BAP and 10 µM AIP (+BAP+AIP) ( FP,  CP), addition of 10 µM AIP (+AIP) ( FP,  CP).

The arrow at day 9 marks the time when first swellings of axillary buds were visible in all series and patatin-mRNA became detectable in the series +BAP. Results are expressed as means ± SD (n = 5).

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