an orienting response to gravity 
                                                            
                                                     
                        
                                                
                        
                        
                            Plants' response to gravity: roots grow downward, showing positive geotropism, while shoots grow upward in a negative response. PICTURE
                                                            
                                                     
                        
                                                
                        
                        
                            The influence of gravity on the direction of growth of plant organs; positive where growth is towards the center of the gravity of the earth, negative when away from it. ( BCFT). Cf. Heliotropism.
                                                            
                                                     
                        
                                                
                        
                        
                            The growth of a plant in response to gravity.
                                                            
                                                     
                        
                                                
                        
                        
                            a turning or growth movement by a plant in response to gravity. Plant parts that grow downward, such as the roots, would be positive geotropism. A negative geotropism would be the stems growing upward
                                                            
                                                     
                        
                                                
                        
                        
                            Geotropism is a plant's reaction to gravity in which the roots go towards the pull of gravity, and the shoots go in the opposite direction.