774 PLANT RESPONSE 



Laws of electrical response, 42 

 ,, growth, 439 

 ,, growth-curvature, 535 

 ,, mechanical response, 51 

 ,, polar action of currents, 199, 207, 558 

 ,, torsional response, 662 

 Leaves, dia-heliotropism of, 640 

 ,, drooping of, by frost, 400 

 ,, response in ordinary, 61 

 Lepidium, heliotropic response of, 60S 

 Light, action of, on autonomous torsion, 669 



,, ,, on longitudinal growth, 572, 573, 574 



,, ,, on non-growing radial organ, 571 



,, ,, on pulsation of Desmodiiim, 690, 691 



,, ,, on pulvinated organ, 570 



,, ,, on subtonic tissue, 569 



,, anisotropy induced by, 84 

 ,, directive versus non -directive action of, 634 

 ,, diverse movements induced by, 565 

 ,, effect on periodic reversals, 692 

 „ induction of torsion by, 659 



,, multiple response induced by, 303, 5S4, 604, 634 

 ,, orientating action of, 587, 697 

 „ supposed specific differences in the action of, 567 

 ,, transmitted action of, 606 

 Light and gravitation, incomplete analogy between the actions of, 597 



See Heliotropic response 

 Longitudinal response in india-rubber, 12 

 ,, ,, in muscle, 12 



,, in plants, 13, 76-80 

 I.ysimachia Nummularia, heliotropic response of, 622, 624 



Maiigifera ndica, response of, 653 

 Marchantia hallus, action of light on, 622 

 Mechanical response, by curling, 91 



,, ,, by uncurling, 89 



,, ,, effect of chemical agents on, 131-137 



,, ,, ,, temperature on, 142-146 



,, ,, favourable conditions for exhibition of, 48 



,, ,, of Allium peduncle, 87 



,, ,, of Arlocarpus, 55 



,, ,, of Biophytum, see Biophytunt. 



, , , , of Mimosa, see Mimosa. 



,, ,, of ordinary leaves, 61, 653, 654 



,, ,, similarity of, in pulvinus, pulvinoid and growing organ, 534 



,, ,, to artificial turgidity-variation, 45 



,, ,, to suctional activity, 399 



,, ,, two types of, 46 



Michelid Champata, chemotropic response of, 548 



