ISDEX 



267 



Orange, 146 



Organic acids, 38 



Organism and cell, 11-21 



Organismal theory, 21 



Organization, 12 



Organs, 20 



Oryzein, 51 



Oscillatoria (blue-green alga), 162 



Osraiophilic platelets, 41 



Overton, 169 



Ovule, 139 



Ovum, 123 



Iiromorphology of, 129 



Pachytene, 99, 108, 109, 110 



Paeonia (angiospemi), 112, 198 



Painter, 96, 97, 185, 188, 201 



Pancreas, 40 



Papaver (angiosperm), 219 



Paracrystalline state, 48 



Paramecium (infusorian), 132, 134, 13o, 229 



Parenchyma, 15 



Parthenocarpy, 146 



Parthenogenesis, 130, 145, 146 



Parthenote, 130 



Pathological tissue, 9, 36, 43 



Pea, 69, 99, 169, 173, 218 



Pecan. 143 



Pectin, 76, 77 



Pectization, 46 



Pdlionia (angiosperm), 42 



Peniophora (fungus), 166 



Penstemon (angiosperm), 247 



Pentosan, 50 



Pentose, 50 



Peony, 112, 198 



Peperomia (angiosperm), 140 



Peptization, 46 



Perforatorium, 121 



Pericarp, 145 



Perisperm, 145 



PeriNdtelline space, 114 



Persimmon, 81 



Petunia (angiosperm), 210 



Peziza (fungus), 164 



pH, 38, 53 



Phaseolus (angiosperm), 27 



Phase, in colloids, 46 



Phenotype, 171 



Phospholipide, 51 



Photosynthesis, 30 



Phragmoplast, 65, 66 



Phragmosome, 58, 69 



Phycoerythrin, 30 



Phycomyces (fungus), 162 



Phycomycetes, 162 



Physcomilrium (moss), 230 



Physiological gradient, 20 



Physiology, 5, 9 



Picea (conifer), 78 



Pigment, 30, 38 



Pisum (angiosperm), 09, 99, 169, 173, 218 



Pits, 76, 77 



Plantayo (angiosperm), 235, 236, 238 



Plasma membrane, 11, 23 



Plasmagel, 22 



Plasmasol, 22 



Plasmodermal blepharoplast, 157 



Plasmodesms, 20, 80, 81 



Plasmodial tissues, 13, 15 



Plasmodium, 16 



Plasmone, 230 



Plastid, 29-34 



of algae, 158, 159 



as cell organ, 11 



as cellulose former, 82 



and chondriosome, 35, 36 



development, 33, 35 



function, 30, 31 



inheritance, 34, 230-232 



mutation, 29 



origin, 34 



primordia, 36 



relation to Golgi material, 40 



in spermatogenesis, 153 



in sporogenesis, 155, 156 



in syngamy, 158, 159 



X-ray effects, 29 



in zygospore, 158, 159 

 Plum, 222 



Poa (angiosperm), 242 

 Podophyllum (angiosperm), 114 

 Podostemon (angiosperm), 140 

 Polar bodies, 114, 122, 140 

 Polar fusion nucleus, 142 

 Polar nuclei, 137, 140 

 Polarity, 19, 20 

 Polarized light, 32, 41, 78 

 Pole plasm, 119 

 Pollen grain, 37, 138 

 Pollen tube, 138, 141 

 Pollination, 140 

 Polocyte, 114, 122, 123 

 Polyembryony, 146 

 Polypeptide chain, 48 

 Polyploidy, 98, 156, 204-215, 219, 256 

 Poly podium (fern), 29 

 Polysiphonia (red alga), 1(10 

 Polyspory, 218, 220 

 Polytrichum (moss), 154, lo.'), 156 

 Portidaca (angiosperm), 138 

 Position effect, 194 

 Postnuclear cap, 120 

 Postnuclear granules, 120 

 Postreduction, 106 

 Potamobius (crustacean), 67 

 Potato, 31, 209 



Potenfilla (angiosperm), 242, 247 

 Prereduction, 106 

 Primary mutant, 199 

 Primary trisomic types, 213 

 Primary wall, 75, 76, 78 

 Prime types, 199 

 Primordial germ cell, 118 

 Primula (angiosperm), 222 

 Principal piece, 121 

 Prometaphase, 61 

 Pronucleus, 125 



