plants - growth and nutrition Flashcards
minerals for healthy growth and transport in plants
what mineral does a plant need for chlorophyll?
magnesium
what mineral is needed to make amino acids and proteins?
nitrates
what do plants transport in the xylem? Which way?
Water and minerals
from the roots to the shoots (up)
What do they transport in the phloem? Where do they transport it?
Food (sugars eg sucrose, or amino acid)
everywhere around the plant
What do you call the movement of substances through the phloem?
Translocation
What is the name of hormone released by plants that promotes growth in the shoot?
Auxin
What is it called when a plant grows toward the light?
Positive phototropism
How do plants grow towards the light?
- stimulus - light
- produces auxin on the shaded side
- cell elongation on shaded side
- grows towards light
different stimulus reactions
- geo/gravitropism
- hydrotropism
- phototropism
What affects photosynthesis
- light intensity
- CO2 concentration
- temperature
- water
what does lime water do?
- it absorbs CO2
- it is also known as potassium hydroxide
PAPER 2 - root hair cells take in w…… by o…….
water
osmosis
PAPER 2 - a root hair cell is covered in long ‘hairs’ (wow… unexpected). Why?
- to increases surface area to absorb water from the soil via osmosis
phloem system is called?
translocation
xylem system is called?
transpiration
what do nitrate ions do?
- make amino acids and proteins
- for CELL GROWTH
what does a nitrate deficiency cause?
- stunted growth
- yellow leaves
what do phosphate ions do?
- make DNA and cell membranes
- used in respiration and growth
what does a phosphate deficiency cause?
- poor root growth
- purple leaves
what do potassium ions do?
- helps the enzymes needed
eg for photosynthesis and respiration
what does a potassium deficiency cause?
- poor flower/fruit growth
- discoloured leaves
magnesium is needed because it makes…
chlorophyll
without magnesium a plant has…
yellow leaves
