776 PLANT RESPONSE 



Musa paradisiaca, response of, 68, 616 

 Muscarin, effect of, on cardiac pulsation, 4 



Nectar, excretion of, 398 



Nemec on statolithic theory, 494 



Noll on anomalous plasmolytic movement, 550 



Nyctitropic movement, of Biophytum petiole, 680 



,, ,, of Mimosa petiole, 681 



,, ,, supposed distinction between heliotropic and. 677 



Old tissues, excitatory reaction in, 57 



Oltmanns on heliotropic response of Lepidium,' 608 



Optic Lever Recorder, 5 



Oryza sativa, direct and indirect effects of stimulus on, 463 

 ,, ,, diurnal variation of growth of, 473 



,, ,, effect of electrification of soil on growth of, 560 



Osmotic versus excitatory action : on ascent of sap, 383 

 >i >5 >> ,, on growth, 485 



Oxa/is, diurnal sleep of, 633 



on mechanical response, 549, 550, 551, 552 



Para-heliotropism, 621 



Paramcecia, chemotaxis of, 699 

 ,, galvanotaxis of, 698 



,, thermotaxis of, 698 



Particles, response to unilateral pressure of, 496 



Passijlora, death-discoloration of petals of, 183 

 ,, effect of age on response, 79 



,, ,, season on response, 80 



,, response of filament, 78 



,, ,, tendril, 89, 611 



,, writhing movement of tendril of, 92 



Perceptive region, of Artocarpus leaf, 60 



, , , , of Desmodium leaflet, 588, 650 



1, ,, of leaflet of Erythrina indica, 65 1 



• » true, 544 

 . versus responding organ, 542, 588 



Periodic after-effect, 683, 685 



,, ,, factors determining, 468 



,, fatigue, 108 



,, groupings: of growth-pulsation, 417, 425 

 ,, ,, of mechanical response, 286 



,, reversals in Desmodium under light, 692 

 ,, variation of Desmodium pulsation, 341, 470 

 11 „ of growth -rate, 470, 473, 474 



,, ,, of transpiration, 472 



Pertz, D., on influence of alternating stimulation, 684 



Pfeffer on action of light, 566 

 ,, on chemo-taxis, 599 



