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module 3
transport in plants
translocation
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loading and unloading mechanism
biology > module 3 > transport in plants > translocation
5 cards
Cards (14)
what is translocation?
transport of
assimilates
in the
phloem
/ transport of
organic
substances in a
plant
what is the liquid that is being transported within sieve tubes called?
phloem sap
what does phloem sap consist of?
sugars
(mainly sucrose),
water
,
amino acids
,
hormones
,
minerals
, and other
dissolved substances
where might sources of
assimilates
be?
green leaves
and
green stem
storage organs
food stores
in
seeds
how are green leaves and stems sources?
photosynthesis produces
glucose
which is transported as
sucrose
, as
sucrose
has less of an
osmostic
effect than
glucose
how are storage organs sources?
for instance tubers and tap roots
unloading
their stored substances at the
beginning
of a
growth period
what are sinks?
where the
assimilates
are
required
where might sinks be?
meristems
that are actively dividing
roots
that are growing or actively absorbing minerals
any part of the plant where the
assimilates
are being stored such as
storage organs
,
developing seeds
or
fruits
What type of process is the loading and unloading of sucrose from the source to the phloem?
an
active
process
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