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Fig. 4. Non-overlapping functions of MP/ARF5 and NPH4/ARF7. (A)
Quantification of cotyledon area of light-germinated seedlings of the
indicated genotypes at 10 dag, grown in the presence of 0 and 1 µM 2,4-D.
Sample sizes are 45 to 50 cotyledons. (B) Hypocotyl length of seedlings of the
indicated genotypes germinated and grown in the dark for 5 days in the
presence of 20 µM IAA. Sample sizes are 10 to 50 seedlings. On hormone-free
media, hypocotyls of all genotypes elongated to 
1.2 cm. (C) Transcript
abundance of the Aux/IAA genes IAA2 and IAA19 in
light-germinated seedlings of the indicated genotypes exposed to 0, 10 and 100
µM IAA at 7 dag for 30 minutes. Transcript abundance from three independent
experiments is displayed as multiples of the wild-type level at 0 µM IAA.
Columns represent the mean±s.e. (A,C) and s.d. (B).
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