Nutrient Uptake (Quiz 3) Flashcards
nutrients are…
…essential elements for plant growth & survival
how many elemental nutrients are there?
17
elemental nutrients are divided into…
based on…
macro- & micro-nutrients
based on their dry plant mass (inorganic)
except for _, _, & _, nutrients are taken up by –>
except for C, H, & O, nutrients are taken up via ion exchange
lack of casparian strip allows
with…
apoplastic movement of nutrients
with the flow of water into the X in the stele
casparian strip forces
symplastic movement of nutrients into the stele-often relies on ion exchange
transport into root occurs through
ion exchange @ the root hair
transport movement from
cell to cell
apoplastic movement =
along cw’s
symplastic movement =
requires…
could be active &/or ion exchange
requires channels in membrane
mineral nutrients originate –>
in soil
what MICROnutrient are we responsible for
Fe
what MACROnutrients are we responsible for
C H O P K N S Ca Mg (not FE bc its micro)
backbone of organic molecules =
C, O, & H
leaf litter =
main source of nutrients for soil
what ingest leaf litter?
& remove?
fungi and animals (mostly inverts)
& remove much of C (leaving nutrients in inorganic forms)
leaf litter broken down by
bac, fungi, soil inverts
waste products =
decrease C & increase other nutrients
C:N for uptake
@ most 10:1 for uptake
in some habitats (grasslands, chaparral, pine forests) nutrients are available
after fire
fire burns mostly
carbon
- leaves higher conc’s of inorganic nutrients after burning of standing dead & leaf litter
crown fire =
burns canopy of trees & shrubs
surface fire =
burns leaf litter on soil surface
ground fire +
soil steralized (no bueno)
Bogs & Fens aka
wetlands/swamps
(Bogs & Fens) soil is
which leads to
waterlogged
leads to anaerobic conditions
(Bogs & Fens) most bacteria & detritivores cant
break down litter
(Bogs & Fens) most plants need more
soluble N & P
(Bogs & Fens) plants acquire nutrients from
insects
anaerobic acidic soil nutrient
are not liberated from organic matter
