Below you see one
bean in light and water throughout the course of one of Becky and Heather's
experiments. The blue arrows and numbers correspond to the following
part:
Hilum
Root
Shoot
True
Leaves
After
one day, the bean showed no growth.
On day 3,
a sprout from the seed is observed.The first sprout from the seed
is the root (2). We measured the root from the tip of the
sprout to the closest edge of the seed.
On day 7,
soon after the root (2) emerged, a dark spot will was observed
on the sprout. This spot is called the hilum (1). We used
the hilum as our reference point to differentiate between the
root and the shoot (3). The root was measured from the
tip of the sprout to the hilum; and the shoot was measured from
the hilum to the closest edge of the seed.
After approximately
8-10 days of growth, another sprout emerges from the opposite
side of the seed. This sprout is the start of the true leaves
(4) of the plant. These will develop into off-shoots of the main
shoot.
On
day 14, additional growth in both the root, shoot, and true leaves
were noted.
