Sunnhemp and rye leaf ground dried residues
were obtained from the same sources
as in Expt. 1 and the aqueous extracts were
prepared as in Expt. 2. Fifteen seeds of each
test species were placed on a piece of filter
paper in a petri dish and 5 mL of aqueous
extract added. Cowpea seeds imbibed all of
the added solution to a greater degree than the
other seeds; thus, on Day 2, an additional 5 mL
of aqueous extract was added to each dish
containing cowpea seeds. Petri dishes were
placed in a growth chamber and maintained at
20 C (12 h) and 25 C (12 h) with no light.
Germination was evaluated by recording hypocotyl
emergence on Day 4.