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Spatio-temporal changes in endogenous abscisic acid contents during etiolated growth and photomorphogenesis in tomato
Jan F Humplík1, Veronika Turečková, Martin Fellner
1a Laboratory of Growth Regulators & Department of Chemical Biology and Genetics ; Center of the Region Haná for Biotechnological and Agricultural Research; Faculty of Science; Palacký University & Institute of Experimental Botany ASCR ; Olomouc , Czech Republic.
Abstract:
The role of abscisic acid (ABA) during early development was investigated in tomato seedlings. The endogenous content of ABA in particular organs was analyzed in seedlings grown in the dark and under blue light. Our results showed that in dark-grown seedlings, the ABA accumulation was maximal in the cotyledons and elongation zone of hypocotyl, whereas under blue-light, the ABA content was distinctly reduced. Our data are consistent with the conclusion that ABA promotes the growth of etiolated seedlings and the results suggest that ABA plays an inhibitory role in de-etiolation and photomorphogenesis in tomato.
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