Fig. 2

SAM-less rpk1 seedlings produce ectopic shoot meristems on cotyledons. a Monocot rpk1-7 seedling with an adaxial ectopic shoot meristem (eSM) carrying several leaves (inset: scheme for clarification). b The same on a rpk1-7 monocot seedling from long-term cultivation. The cotyledon has lost its greening. Arrowheads point to the root. c-d Monocot rpk1-7 seedlings in GL1 background with a normally positioned SAM c and with an eSM d respectively. Note the trichomes on the normal and ectopic primary leaves. A characteristic tissue outgrowth carries the eSM (arrow). e1-e5 Growth of an eSM (black arrow) on a cotyledon from a rpk1-7 seedling during the first two weeks. e6 The same after one month. f Progeny from the eSM rpk1-7 plant shown in e1-e6. g A rpk1-6 monocot seedling carrying two leaf outgrowths (arrows) on top of an abnormally thickened cotyledon. The arrowhead points to a trichome. Cotyledons (c), normal (lf) and ectopic leaves (elf) are indicated. Scale bars: 1 mm except in e6 e6: 1 cm