Brassinosteroid-induced exaggerated growth in hydroponically grown Arabidopsis plants

Physiologia Plantarum
Jeannette M Arteca, Richard N Arteca

Abstract

The effects of root application of brassinolide (BL) on the growth and development of Arabidopsis plants (Arabidopsis thaliana ecotype Columbia [L.] Heynh) were evaluated. Initially, all leaves were evaluated on plants 18, 22, 26 and 29 days old. The younger leaves were found to exhibit maximal petiole elongation and upward leaf bending in response to BL treatment. Therefore, based on these results leaves 6, 7 and 8 on 22-24-day-old plants were selected for all subsequent studies. Elongation along the length of the petiole in response to BL treatment was uniform with the exception of an approximately 4 mm region next to the leaf where upward curvature was observed. Both BL and 24-epibrassinolide (24-epiBL) were evaluated, with BL being more effective at lower concentrations than 24-epiBL. The exaggerated growth induced by 0.1 µM BL was not observed in plants treated with 1 000-fold higher concentrations of GA3, IAA, NAA or 2,4-D (100 µM). In addition, no exaggerated growth effects were observed when plants were treated with 200 ppm ethylene or 1 mM ACC. All treatments with BL, NAA, 2,4-D, IAA or ACC promoted ethylene and ACC production in wild type Arabidopsis plants, but only BL triggered exaggerated plant growth. BL also prom...Continue Reading

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Citations

Sep 23, 2008·Plant Molecular Biology·Eva Benková, Jan Hejátko
Jan 19, 2008·Theory in Biosciences = Theorie in Den Biowissenschaften·G Nissim Amzallag
Nov 28, 2002·Phytochemistry·B Vidya Vardhini, S Seeta Ram Rao
Jun 28, 2008·Journal of Experimental Botany·Richard N Arteca, Jeannette M Arteca
Dec 2, 2011·Journal of Experimental Botany·Florent VilliersVéronique Hugouvieux
Jan 2, 2016·Biochimica Et Biophysica Acta·Martin ČernýBřetislav Brzobohatý
Dec 29, 2009·Phytochemistry·Chan Ho ParkSeong-Ki Kim
Jan 12, 2007·Journal of Plant Physiology·Richard N Arteca, Jeannette M Arteca
Apr 12, 2005·Plant Biology·C Müssig
Dec 9, 2014·Plant Signaling & Behavior·Tábata BergonciDaniel S Moura
Dec 8, 2011·Physiologia Plantarum·Seung-Hyun SonSeong-Ki Kim
Apr 6, 2004·FEBS Letters·Danahe Coll-GarciaCarsten Müssig

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