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Fig. 4. GA regulates miR159 levels via the DELLA-dependent GA signalling pathway.
(A) RNA gel-blot analysis of miR159, MYB33 and SOC1 from
wild-type (WT), gai, ga1-3 and ga1-3 gai-t6 rga-24 plants
grown in long days (LD) in the presence (+GA) or absence (GA) of
gibberellin (100 µM GA3 sprayed twice per week). The blots were
stripped and re-analysed with miR167 and ELF4a probes (RNA controls).
(B) RNA gel-blot analysis of miR159 levels in wild-type and
sln1-dwarf mutant barley (Hordeum vulgare). 5S rRNA was used
as RNA control.