LM 2e plant nutrition Flashcards
what is the photosynthesis word equation?
carbon dioxide + water -> glucose + oxygen
what is the photosynthesis symbol equation (balanced)?
6CO2 + 6H2O -> C6H12O6 + 6O2
how do you test leaves for starch?
put in boiling water. then put in ethanol. covered with iodine solution. blue-black colour will appear.
what are the limiting factors for photosynthesis?
temperature
light intensity
carbon dioxide concentration
how does temperature affect rate of reaction?
increases rate of reaction. will decrease when enzymes become denatured (get to hot)
how does light intensity affect rate of reaction?
without enough light a plant cant photosynthesis, increasing the light will increase the rate of photosynthesis
how does carbon dioxide concentration affect rate of reaction?
it cant photosynthesis if there is insufficient carbon dioxide
what colour does carbon indicator turn for each thing?
red for normal, yellow for high and purple for low
what is the upper epidermis?
the part of the leaf above the palisades layer that prevents the loss of water and allows light to enter
what is the palisade mesophyll?
Layer of tall, column-shaped mesophyll cells just under the upper epidermis of a leaf, maximises photosynthesis
what is the spongy mesophyll?
irregularly shaped cells with spaces around them located below the palisade mesophyll. increases surface area to volume ratio for diffusion of gases
what is the lower epidermis?
protective layer on the bottom of leaf which contains stomata & guard cells
what are the guard cells?
The two cells that flank the stomatal pore and regulate the opening and closing of the pore.
what is the Stomata?
Small openings on the underside of a leaf through which oxygen and carbon dioxide can move
what does the xylem do?
transports water
what does the phloem do?
transports sucrose and amino acids.
what does the Wax cuticle do?
protects the leaf without blocking out light and letting water get out.
how does a large surface area help?
absorbs more light
why are leaves thin?
allows CO2 to diffuse quickly
Chlorophyll
Green pigment in plants that absorbs light energy used to carry out photosynthesis
network of veins
To support the leaf and transport water and carbohydrates
Nitrate deficiency =?
stunted growth and yellow leaves
Mg is needed to make
chlorophyll
nitrate is need to make
amino acids (proteins building blocks)
