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Fig. 1 | BMC Plant Biology

Fig. 1

From: Dosage imbalance of B- and C-class genes causes petaloid-stamen relating to F1 hybrid variation

Fig. 1

Flower morphology of Petrocosmea glabristoma (♀), P. sericea (♂) and their F1 hybrids. Both P. glabristoma (a) and P. sericea (b) produce zygomorphic and whorl-ranged perfect flowers which are mainly different from each other in the shape and size of dorsal petals in the second whorl and the shape of filaments in the third whorl. The F1 hybrid flowers are generally intermediate between the two parents in morphology. Some flowers of the F1 hybrids have normal stamens biased to the maternal parent (c), while others have stamens replaced by petaloid organs (e). d Dissected third floral whorl organs of the wild-type F1 hybrid flower with two fertile ventral stamens, two aborted lateral staminodes and one vestigial dorsal staminode. The stamens or staminodes increase in size from the dorsal to the ventral. f Dissected third floral whorl organs with five petaloid-stamens of the mutant F1 hybrid flower. These petaloid-stamens are different in size similar to the stamens and staminodes in corresponding position of the wild-type flower. For each flower, both the front (left) and side view (right) are shown. Dp, dorsal petal; Lp, lateral petal; Vp, ventral petal; S, sepal; P, petal; Vst, ventral stamen; C, carpel; Ps, petaloid stamen. Lst, lateral staminode; Dst, dorsal staminode; Vps, ventral petaloid-stamen; Lps, lateral petaloid-stamen; Dps, dorsal petaloid-stamen. Bar, 0.5 cm

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