2.80 Geotrpism

• Geotropic means geo is gravtiy and tropic is a growth responses so, its a growth responses to gravity.
• Example is take a seed and we arbsorb the seed growing we find the embryonic roots all grow downwards this is describe as positive geotropism.
• Where is the embryonic should grow upwards towards the soil surface and this is negative geotropism.
• Further experiment involve taking the same germinating seed turning it as shown so, it been rotated.
• Then what we see is that the shoot would then grow upwards and show the negative geotropism again and the embryonic root will turn and grow downwords the root positive geotropism.