plant nutrition and transport Flashcards
what is the word and chemical equation for photosynthesis
carbon dioxide + water -> glucose + oxygen
6C02 + 6H20 -> C6H12O6 + 6O2
Where does photosynthesis occur
chloroplasts
how do plants get the carbon dioxide needed for photosynthesis
it diffuses from the air into the leaves via the stomata
how do plants get the water required for osmosis
it diffuses from the soil into root hair cells via osmosis
what are the main uses of glucose in plants
makes cellulose
makes amino acids
cellular respiration
Factors affecting photosynthesis
light intensity
temperature
concentration of C02 in the air
amount of chlorophyll the plant has
how can conditions for photosynthesis be made artificially
Use of greenhouses - trap sun heat to increase temp - are encloses so no pests/ pathogens can get to the plant
artificial light - photosynthesis can occur all day
paraffin heater - releases co2 + heat
fertiliser - plants get enough minerals
why do plants need mineral ions
they need certain elements for healthy growth which they get by absorbing mineral ions
how do plants absorb mineral ions
through their root hair cells
which requires active transport
why do plants need magnesium ions
to produce chlorophyll
why do plants need nitrate ions
nitrates contain nitrogen which is needed to make amino acids - which are needed to make proteins and a deficiency will lead to stunted growth
what is the role of the xylem
to transport water and mineral ions from the roots to the leaves
factors affecting transpiration
light intensity
temperature
air flow
humidity
what is translocation
the movement of cell sap up and down the plant
what do phloem cells have that allow cell sap to pass along the phloem tube
pores
