RESPONSE IN THE LIVING AND NON-LIVING 



CHAPTEK IV 



ELECTRIC RESPONSE IN PLANTS BLOCK METHOD 



PAGE 



Method of block Advantages of block method Plant response a 

 physiological phenomenon Abolition of response by anaesthetics 

 and poisons Abolition of response when plant is killed by hot 

 water . 27 



CHAPTEE V 



PLANT RESPONSE ON THE EFFECTS OF SINGLE STIMULUS 

 AND OF SUPERPOSED STIMULI 



Effect of single stimulus Superposition of stimuli Additive effect 

 Staircase effect Fatigue No fatigue when sufficient interval 

 between stimuli Apparent fatigue when stimulation frequency 

 is increased Fatigue under continuous stimulation ... 35 



CHAPTEE VI 



PLANT RESPONSE ON DIPHASIC VARIATION 



Diphasic variation Positive after-effect and positive response Eadial 



E.M. variation ...... 44 



CHAPTEE VII 



PLANT RESPONSE ON THE RELATION BETWEEN 

 STIMULUS AND RESPONSE 



Increased response with increasing stimulus Apparent diminu- 

 tion of response with excessively strong stimulus .... 



51 



