Whole duckweed and water lettuce plants were collected from
freshwater ponds, Can Tho City, South Vietnam (9◦27 N 106◦ E), in
September of 2009 (the wet season), then washed with tap water
and individually dried in the sun. These dried materials, which
served as the basis for all experiments, were packed and protected
from water vapor in the air by a silica gel-desiccant, then stored at
3 ◦C in a fridge.
Whole duckweed and water lettuce plants were collected fromfreshwater ponds, Can Tho City, South Vietnam (9◦27 N 106◦ E), inSeptember of 2009 (the wet season), then washed with tap waterand individually dried in the sun. These dried materials, whichserved as the basis for all experiments, were packed and protectedfrom water vapor in the air by a silica gel-desiccant, then stored at3 ◦C in a fridge.
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