Parts of the Plant
has dead cells and lignin
xylem
humidity decrease's the rate of transpiration
with increased humidity, the concentration gradient is weaker so the rate of evaporation is slower and less water is lost
In an experiment where a white flower or celery stalk is placed in coloured water, what does the movement of colour show?
It shows water transport through the xylem vessels.
has a large surface area and mitochondria
root hair cell
is the phloem packed with mitochondria
ATP Production: They are packed with mitochondria to generate ATP, which powers the active loading of sugars into the sieve tube elements
What does a potometer measure, and what does it estimate?
It measures water uptake, which estimates the rate of transpiration
materials can travel both up and down
phloem
storage organs are a source during spring
Dissolved food is always transported from the source (where it’s made) to sink (where it’s stored or used)
During a growth period (eg during the spring), the storage organs (eg roots) would be the source and the many growing areas of the plant would be the sinks.
What happens to a plant when it loses more water than it absorbs?
It wilts. The cells lose turgor pressure and become flaccid