Figure 1. Interaction of cress and A. caudatus L. seedlings. A, Cress
seeds were cultured together with other cress seeds. B, Amaranthus
seeds (upper) were cultured with cress seeds (below). C, Amaranthus
seeds were cultured with Amaranthus seeds. Ten seeds of the
same or different species were cultured in a Petri dish (3 cm) in the
dark at 25°C for 5 d. Scale bar, 1 cm.
of germinated cress seeds when the cress seeds were surface
sterilized in 0.5% sodium hypochlorite for 5 min, washed in
sterile water, and cultured in sterile water.