Transcript PLANT ADAPTIONS

Plant Adaptations
A Narcissus Bulb.
Red Arrow = Mother Bulb, Blue Arrow = Succulent foliage leaves
originating from the basal plate, Green Arrow = Basal plate (Stem),
Yellow Arrow = Daughter Bulb.
A corm e.g. Gladiolus
A corm is a modified stem. The stem is condensed and there
are no succulent foliage leaves which are present on bulbs. The
yellow arrow is pointing to new shoots developing from buds on
the corm.
A stem tuber.
The eyes on the potato are the buds as shown by the red arrow
.
A cladode of Ruscus.
This is a modified stem, shaped like a leaf as shown by the red
arrow
Offsets in Sempervivum.
These are small stolons and succulent leaves for water storage
with fine hairs to reduce transpiration.
A rhizome in a grass.
The rhizome (as shown by the red arrow) is a creeping stem below
ground. Buds are present on the rhizome which gives rise to new
plants and allows the plant to spread asexually.
A root tuber of Dahlia.
The red arrow is pointing to the root tuber, a swollen root
storing starch.
Insect-trapping leaves in insectivorous Pinguicula spp. The
insects, which stick to the leaves, supply nitrogen as the plant
grows in waterlogged, nitrogen poor soils.
A modified insect-trapping leaf in Drosera spp., an
insectivorous plant. Insects are trapped by the sticky leaf
hairs.
A modified leaf of Nepenthes spp. which forms a ‘pitcher’ into
which the insects fall and are trapped.
A modified leaf in insectivorous Sarracenia spp. which forms a
‘pitcher’ into which insects fall.
A modified leaf in insectivorous Dionaea muscipula which closes
rapidly trapping the insect inside.