yj6 PLANT RESPONSE 



Afusa paradisiaea, 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 Mini osa 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 



on growth, 485 



on mechanical response, 549, 550, 551, 55: 



Oxa/is, diurnal sleep of, 633 



Para-hei.iotropism, 621 

 Parametria, chemotaxis of, 699 

 ,, galvanotaxis of, 698 



,, thermotaxis of, 698 



Particles, response to unilateral pressure of, 496 

 Pa ssi flora, 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, oiArtocarpus leaf, 60 



,, ,, of Desmodium leaflet, 588, 650 



, ,, of leaflet of Erythrina indiea, 651 



,, true, 544 

 versus responding organ, 542, 588 

 Periodic after-effect, 683, 685 



,, ,, factors determiniog, 468 



,, fatigue, 108 



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

 tf ,, of mechanical response, 286 



,, reversals in Desmodium under light, 692 

 ,, variation of Desmodium pulsation, 341, 470 

 ,, ,, of growth-rate, 470, 473, 474 



„ ,, of transpiration, 472 



I'erU, D., on influence of alternating stimulation, 684 

 Pfeffer <m action of light, 566 

 ,, on chemo-taxis, 599 



