Dictionary Definition
radicle n : (anatomy) a small structure
resembling a rootlet (such as a fibril of a nerve)
User Contributed Dictionary
English
Pronunciation
- , /ˈɹædɪkəl/, /"r
Extensive Definition
In botany, the radicle is the first
part of a seedling (a
growing plant embryo) to
emerge from the seed during
the process of germination. The radicle is
the embryonic root of the
plant, and grows downward in the soil(The shoot emerges from the
plumule). Above the radicle is the embryonic stem or
hypocotyl, supporting
the cotyledon(s).
The radicle emerges from a
seed through the micropyle. Radicles in seedlings are classified
into two main types. Those pointing away from the seed coat scar or
hilum are classified as antitropous, and those pointing towards the
hilum are syntropous.
If the radicle begins to
decay, the seedling undergoes preemergence damping-off. This
disease appears on the radicle as darkened spots. Eventually, it
causes death of the seedling.
The plumule is the baby
shoot.It grows after the radicle.
radicle in Danish:
Kimrod
radicle in Portuguese:
Radícula
radicle in Chinese:
胚根