nutrition in plants Flashcards
what is photosynthesis
this is the process by which plants convert light into energy
what are the limiting factors of photosynthesis
light intensity
amount of c02
temperature
how does temperature affect photosynthesis
this is because it controlled the enzymes so if it was warmer it would have more energy but if it get too high then the enzymes de nature
what is the equation for photosynthesis
carbon dioxide + water –> glucose + oxygen
how does light affect photosynthisis
the more light the plant receives the faster the rate of photosynthesis
but other factors limit it.
carbon dioxide concentration
this is needed for the reaction but it is also limited by itself or other factors
what is the the top layer of a leaf
waxy cuticle
what is bellow the waxy cuticle
upper epidermis
where in a leaf is it the highest amount of chloroplasts
palisade mesophyll
what is below the spongy mesophyll
lower epidermis
what is bellow the palisade mesophyll
spongy mesophyll
what is the cell that allows things in and out of the leaf
guard cell
what is the little hole on the bottom of the leaf called
stomata
what is the role of the waxy cuticle
this prevents water from evaporating
what is the role of the upper epidermis
it is thin and transparent to allow light into the palisade mesophyll layer
what is the role of the palisade mesophyll
column shaped cells tightly packed with chloroplasts to absorb more light, maximising photosynthesis
what is the role of the spongy mesophyll
it increase surface area to volume ratio to maximise diffusion
what is the role of the lower epidermis
it contains guards cells and stomata
what is the role of the guard cell
opens and closes the stomata to allow cardon dioxide to diffuse in
what is the stomata
it is where plant gas exchange happens. this is mainly used for water regulation
what does magnesium help with
this is needed to make chlorophyll
what happens if a plant has a magnesium defiantly
causes yellowing between the veins of leaves
what do nitrates help with
they are sources of nitrogen need to create amino acids to build proteins and DNA
what happens if you have an nitrate deficiency
causes stunted growth
how to test for photosynthesis
pondweed
count the bubbles
how do you test leaf for starch
put lef in boiling water to break down cell walls.
put leaf in ethanol to get rid of chlorophyll
add iodine solution
