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Fig. 4. Genetic interaction of PGPs with PIN1 during embryonic leaf
formation. (A-D) Synergistic interaction of pgp1pgp19 and
pin1 during cotyledon formation. Typical defects in cotyledon
formation during embryogenesis and their postgermination appearance are shown:
wild type (A), pin1 (B), pgp1pgp19 (C) and
pin1pgp1pgp19 (D). (E) Cup-shaped cotyledons of the
pin1pgp1pgp19 seedling that are rarely seen in the pin1
mutant. (F) Strong enhancement of the pin1 phenotype in
post-embryonal development by the pgp1pgp19 mutation. An adult,
5-week-old, plant with extremely dwarf appearance, reduced leaf number and
apical dominance is shown. (G) Quantification of frequencies of
cotyledon defects in different mutants and their combinations
(n=200). Scale bars: 1 mm in A-D; 5 mm E,F.
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