Photosynthesis And Healthy Growth Flashcards
Nitrates in plants contain ……. For making ….. ….. And …….. Which are need for cell growth. If a plant can’t get enough nitrates it will be stunted and have …………
Nitrates in plants contain nitrogen for making amino acids and proteins. These are needed for cell growth. If a plant can’t get enough nitrates it will be stunted and will have yellow older leaves.
Phosphates in plants contain phosphorus for making DNA and they’re needed for …….. And ……
Plants without enough phosphate have……… And ……
Phosphates in plants contain phosphorus for making DNA and cell membranes and they’re needed for respiration and growth. Lands without enough phosphate have poor root growth and purple older leaves.
Potassium in plants help……. Needed for …… And ……
If there’s not enough potassium in the soil, plants have ……….. And …….
Potassium in plants help enzymes needed for photosynthesis and respiration. If there’s not enough potassium in the soil, plants have poor flower growth and discoloured leaves.
Magnesium is the most significant because it is required for making….. (Needed for …….)
Plants without enough magnesium have …….
Magnesium is one of he most significant as it’s required for making chlorophyll( needed for photosynthesis)
Plants without enough magnesium have yellow leaves.
Xylem tube transports water and mineral salts from the … Up the …. To the leaves in the transpiration stream.
The xylem carry water and minerals from the roots up the shoot to the leaves in the respiration stream.
Phloem transports sugars, like …. And ….. From where they’re made in the leaves to other parts of the plant. This movement of food is called …….
The phloem transport sugars, like sucrose, and amino acids from where they’re made in the leaves to other parts of the plant. This movement of food substances around the plants is known as translocation.
Factors affecting rate of photosynthesis
Temperature, CO2,light
Each branch of a root with be covered in millions of microscopic hairs to give ………
To give the plant a big surface area needed for absorbing water from the soil.
What is transpiration?
Transpiration is the loss of water from the plant.
What is transpiration caused by?
Evaporation and diffusion of water from a plants surface. Most transpiration happens at the leaves.
Evaporation causes water shortage so more wart is drawn up from the roots through xylem vessels, so there is a constant transpiration stream of water thigh the plant.
What is transpiration rate affected by?
Light intensity
Temperature
Wind speed
Humidity
How can you use a potometer to estimate transpiration rate?
1) cut a shoot underwater to prevent air from entering the xylem.cut it at a slant to make a bigger surface area.
2) assemble the potometer in water and insert the shoot under water, so no air can enter.
3) remove the apparatus from the water BUT keep the end of the capillary tube submerged in a beaker if water.
4) MAKE SURE THE APPARATUS IS WATERTIGHT AND AIRTIGHT.
5) dry the leaves, allow time for the shoot to acclimatise and then shut the tap.
6) remove the end of the capillary ruby from the beaker of water until one air bubble has formed, then out the end of the ruby back into the water.
7) record a start position for the air bubble.
8) start a stopwatch and record the distance moved by the bubble per unit time.
9) keep the conditions constant throughout the experiment , e.g. Temperature and air humidity.
