Biology Ch 25 - flowering plants : nutrition and transport

Photosynthesis

Takes place in the chloroplast

☀+ 6Co2 + 6H2O → C6H12O6 + 6O2

Three elements needed for survival

Carbon, hydrogen, oxygen - all of these can come from photosynthesis also

Minerals

In organic nutrient (generally don’t have carbon and hydrogen together)

nutrient classes

Essential nutrients, macronutrients, micronutrients, beneficial nutrients

Essential nutrients

Identifiable role, cannot be substituted

Deficiency → plant dies

Macro nutrients

Required in large amounts to provide energy

Micro nutrients

Required and smaller amounts to provide energy

Beneficial nutrients

Not essential, but does better with it

Water uptake

Water moves into the root by osmosis (no ATP)

Osmosis

Diffusion of H2O from high → low

Mineral uptake

Plant uses energy (ATP) , moves minerals from low concentration → high concentration

Cohesion

Water sticks to water

Adhesion

Water sticks to “sticky” /rough surfaces

Transpiration

Plant releasing water via stomata

Xylem walls are “sticky” = water adhesion

H2O ←> H2O chain is formed = cohesion

Collision tension model

Water transport description

Create a “pull” of the chain of water