Plant & Cell Physiology 53: 81-95 (2012)

Myrigalone A inhibits Lepidium sativum seed germination by interference with gibberellin metabolism and apoplastic superoxide production required for embryo extension growth and endosperm rupture[W]

Krystyna Oracz*, Antje Voegele, Danuše Tarkowská, Dominique Jacquemoud, Veronika Turecková, Terezie Urbanová, Miroslav Strnad, Elwira Sliwinska, Gerhard Leubner-Metzger*
*shared corresponding authors
University of Freiburg, Faculty of Biology, Institute for Biology II, Botany / Plant Physiology, Schänzlestr. 1, D-79104 Freiburg, Germany, Web: 'The Seed Biology Place' - (K.O., A.V., D.J., G.L.-M.)
Laboratory of Growth Regulators, Faculty of Science, Palacky University and Institute of Experimental Botany AS CR, v.v.i., Šlechtitel? 11, CZ-783 71, Olomouc, Czech Republic (D.T., V.T., T.U., M.S.)
Centre of the Region Haná for Biotechnological and Agricultural Research, Faculty of Science, Palacky University, Šlechtitel? 11, CZ-783 71, Olomouc, Czech Republic (M.S.)
Laboratory of Molecular Biology and Cytometry, Department of Plant Genetics and Biotechnology, University of Technology and Life Sciences, Kaliskiego Ave. 7, PL-85-789 Bydgoszcz, Poland (E.S.)

Received 11 July 2011; Accepted 3 September 2011; First published online 8 September 2011
DOI 10.1093/pcp/pcr124

MyA inhibition cress germination

Fig. 2.    The effect of myrigalone A (MyA) on seeds and seedlings of Lepidium sativum incubated in continuous white light.

(A) Seed structure of L. sativum. RAD (lower 1/3 of the radicle/hypocotyl axis) and CAP (micropylar endosperm) tissues are indicated.

(B) Typical endosperm rupture and radicle protrusion of a germinated L. sativum seed (CON, control).

(C) Atypical endosperm rupture of a MyA-treated seed.

(D) L. sativum seedlings grown from seeds without (CON) and with treatment with 5x10-4 M MyA (with bleached cotyledons).


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Fig. 1         Fig. 2         Fig. 3         Fig. 4         Fig. 5         Fig. 6       Table 1
Fig. S1       Fig. S2       Fig. S3       Fig. S4       Tab.S1     Tab.S2     Tab.S3     Tab.S4
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