Plant Biology Flashcards
What does water do to help the seed grow
Lets the seed swell and the embryo start to grow
What does oxygen do for the seed to help it grow
Needed for aerobic respiration
What does warmth do to the seed to help it grow
Increases growth rate and enzyme activity (but very high temperatures denature enzymes)
What do plants need to stay healthy
Vitamins and minerals
What vitamins and minerals do plants need to stay healthy and why
Calcium- to build cell walls
Magnesium- for chlorophyll formation
Nitrogen- for amino acids and protein formation
What does a plant with no nitrogen look like
Upper leave pale green
Lower leaves yellow and dead
What does a plant with no potassium look like
Yellow leaves with dead spots.
What does a plant with no phosphorus look like
Purple leaves and small roots
What does a plant with no magnesium look like
Upper leaves are normal
Lower leaves are pale green or yellow
Where do plants get their minerals from
The soil.
Plant roots are covered in root hair cells, which take in minerals and water from the soil.
What 2 reasons are roots branched out for
absorb water (and mineral salts) from a large amount of soil
anchor the plant in the soil.
2 features of a root hair cell
thin walls and a large surface area to help them absorb lots of water.
What’s the optimum temperature for plant growth in your greenhouse
30°c
What’s the optimum light intensity for plant growth in your greenhouse
20,000 lux
What’s the optimum carbon dioxide concentration for plant growth in your greenhouse
4%
