How do plants acquire nutrients?
: the major ingredients for macromolecules: carbon, hydrogen, oxygen, nitrogen.
Carbon enters the living world from CO2 in the atmosphere through fixation by photosynthesis.
Hydrogen and oxygen enter as water. These three elements are in plentiful supply.
In the soil, these and other minerals are dissolved in the
Plants, some protists, and some bacteria, are autotrophs.
require pre-formed organic molecules and depend directly or indirectly on autotrophs for
, using energy from reduced inorganic compounds such as H2S. All are
Plants grow towards nutrients and water
Microenvironmental conditions can encourage or discourage growth of roots.
For example, animal droppings create local high concentrations of nitrogen.
What mineral nutrients do plants require?
Except for nitrogen, all the minerals required by plants are derived from rock—usually taken up from
is one required for the plant to complete its life cycle, and cannot be replaced by
: need at least 1 g per kg of dry plant matter:
(proteins, nucleic acids, etc),
cells opening- guard cells, enzyme activation, water balance, ion balance),
(nucleic acids, ATP,
phosphorylization of enzymes),
(in proteins and coenzymes),
(membranes, cytoskeleton formation,
spindle formation, etc.),
(chlorophyll, cofactor for enzymes, stabilizes ribosomes),