The effect of gravity and centrifugal force on plants

Продукт No: P4050200


The main shoot of a plant generally follows a perpendicular direction away from the centre of gravity of the earth (negative geotropism), whereas the main root grows towards the centre of gravity (positive geotropism). If however the plant is placed on a rotating horizontal disk, this will alter the direction of growth of the shoot and of the root.


  • Quantitative determination of gravity effects on plant growth
  • Experimental setup can be used for other experiments


  1. Measure the alignment of shoots and roots under the effect of centrifugal forces which are less than, equal to or greater than gravity
  2. Raise sunflower seedlings in small beakers in a rotating drum
  3. Set different centrifugal forces by changing the speed of rotation of the drum motor.

What you can learn about

  • Positive geotropism of roots
  • Negative geotropism of shoots
  • Centrifugal force
  • Rotational speed
  • Statoliths
  • Geotropism

Перечень материалов (вы́писка) Продукт Количество
Strobe drum 65976-00 1
PHYWE power supply, 230 V, DC: 0...12 V, 2 A / AC: 6 V, 12 V, 5 A 13506-93 1
Motor with disk holder 11614-00 1
Support base, variable 02001-00 1
Insertion piece for centrifuge 65976-10 1
Boss head 02043-00 1
Support rod, stainless steel, 500 mm 02032-00 2
Connecting cord, 32 A, 750 mm, red 07362-01 1
Connecting cord, 32 A, 750 mm, blue 07362-04 1
Support rod, stainless steel, l = 250 mm, d = 10 mm 02031-00 1
Beaker, 50 ml, high-form 46025-00 10

Назад к перечню

Продукт No: P4050200

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