Question

does anyone have any results related with measuring rate of water uptake by a plant shoot using potometer??

Answer 1

Answer:

Class practical

In this activity the rate of water uptake, due to transpiration, by a shoot from a woody plant, is measured by timing how long a bubble takes to move a set distance, in the capillary tube of an h-shaped potometer.

Lesson organisation

Decisions will depend on the availability of suitable potometers. This could be a demonstration or an experiment for groups of up to three individuals – observer, timekeeper and scribe.

Apparatus and Chemicals

For each working group – equipment to investigate factors affecting rate of transpiration:

Lamp

Light meter

Fan

Anemometer

Vaseline or nail varnish

Graph paper

For each working group – basic equipment:

• Plant material (Note 1)

• Large sink – to assemble apparatus under water (Note 2)

• Potometer – designs vary

• Scalpel or scissors, 1

• Clamp stand with boss and clamp, 1

• Marker pen, 1

• Stop clock, 1

• Beaker

• Water

• Plastic ruler

• Paper towels

• Thermometer (-10 °C to 110 °C), 1

• Food colouring, optional (Note 2)