Water in Plants 



— 235 



Subject Index 



Drought susceptible varieties, 201 

 Dusts, effect on transpiration, 198-200 

 Dyes, downward movement in xylem, 157, 159 

 explanation of penetration, 157 

 indicators of water movement, 168-169 

 movement and rate of sap flow, 156, 169 

 penetration and water continuity, 156-159 

 water soluble, 69 



Ectoderm, 137 



Ectoplasm, permeability of, 135 



refractive index of, 134 



rupture of, 89 

 Ectoplast, 78, 87 



Elatostemma, water continuity in, 161 

 Electrokinetic activity, 81, 142, 143, 144 

 Electrolytes, electrokinetic potential and, 142 

 Electrolytic solutions, thermodynamics of, 31 

 Electronegativity, and hydrogen bond, 22 

 Electroosmosis, 141, 145 

 Electrostatic forces, 21, 67 

 Elodea, 60, 124, 125 



Endodermis, deposition of cutin and suberin in, 

 193 



role in water absorption, 149 

 Endosperm, sap expressed from, 132 

 Enzyme activity, and water deficit, 200-203 

 Eosin, movement in stems, 204, 205 

 Epidermis, OP in, 99, 125 

 Erythrocytes, osmotic behavior of, 136 

 Escaping tendency, 38, 41, 44, 76, 93 

 Essential oils, wettability of intercellular sur- 

 faces with, 193 

 Ethyl alcohol, physical properties of, 4 

 Ethylene glycol, stomatal studies with, 197 

 Ethyl ether, wettability of intercellular surfaces 



with, 193 

 Eucalyptus, rate of sap flow in, 169 

 Eucalyptus globulus, internal leaf surface of, 



195 

 Evaporating surface, internal, 195 

 Evaporation, atmospheric pressure and, 182 



factors affecting, 182-183 



from free water surface, 181 



from tubes, 181-182 



laws of, 180-183 



rate of, 182 

 Exudation, 104, 139 



auxin effect, 150 



from roots, 150 



Fagus, rate of sap flow in, 171, 172 

 sylvatica, OP in, 99, 118 

 water content of leaves of, 61 



Faraday Symposium, 5-6, 14-15 



Fibrils, 63, 64, 192 



Ficus elastica, wettability of intercellular sur- 

 faces of, 193 



Field capacity, 23 



Fissures, cuticular, 188 

 protoplasmic, 117, 118 



Flower initiation, translocation of stimulus of, 

 176 



Fluorescein, indicator of translocation, 175 



Fluorescent materials, use in sap movement ex- 

 periments, 168, 169 



Foods, mechanism of movement, 174 



Force fields, 76 



Forces between atoms and molecules, 20-24, 182 

 coordination, 29 



Forsythia, tensions in, 163 



Fouquieria splendens, transpiration in, 191 



Fraxinus, gas in stem of, 161 



Free energy, 29, 30, 76-77 



Freezing point (see also Cryoscopy), detn. of, 

 93-95 

 of tissue, 132-136 

 thermometers, 92 

 values, 120, 134 



Frost hardening, 145 



Frost resistance, evidence for active water re- 

 lations, 132-136 



Fruits, as reservoirs of water, 172 



Fucus, permeability of eggs of, 80 



Fugacity, definition, 41, Tl 

 gradient, 77 



Fumarate, active water relations and, 129 



g (limiting plasmolysis), 98 

 Gas constant R, 32 



Gas in xylem, experimental techniques and, 

 155-157, 160-161 



field demonstration of, 161 



wilting and, 160 

 Gas law, ideal, 19 



Gaultheria shallon, internal leaf surface of, 195 

 Gay Lussac's law, 32 



Girdling, translocation studies by, 176-177 

 Glandular secretion, 140 

 Glucose residues, 63 

 Gossypium barbadense, OP of, 118 

 Growth, soil moisture influence on, 148 



water movement and, 154 

 Gum, 69, 154, 156 



Gunda ulvae, water relations of, 137 

 Guttation, 148, 150 



Haldane's equation, 37 



HalocysHs, solute accumulation in, 138 



Hard leaf method, of DPD detn., 105 



Hardening, 135, 199 



Heat capacity, 4 



Heat method, in detn. of rate of water move- 

 ment, 170 



Heat of fusion, 4 



Heat of vaporization, 4 



Hedera helix, expressed sap of, 120 



Helianthus annuus, osmotic quantities of seed- 

 lings of, 106-107 



Helianthus tuberosus, active water relations in, 

 146 



Helleborus foetidus, OP in, 99 



Hemicellulose, 202 



Heptacosanol, in cutin, 187 



Heteroauxin (see Auxin) 



Hexahydrate, of sucrose, 27, 37 



Hexane, physical properties of, 4 



Hookeria tucens, adhesion in, 83 



Hormones, translocation of, 176-177 



Hydration, 24-30, 135, 141 

 foliar, 145 

 heats of, 25 

 number, 35, 36, 37 

 of cellulose, 24, 63-65, 155 

 of ions, 27 

 of protoplasm, 65-69, 71, 107, 122, 134-135 



Hydrogen, thermal properties of, 4 



Hydrogen bonds, 15, 22, 29, 67, 175 



Hydrogen ion, high migration velocity, 13, 30 



Hydrogen sulfide, thermal properties of, 4 



Hydrols, 5, 13 



later work on theory of, 6-7 



Hydrolytic enzyme reactions, 200 



Hydrones, 5 



Hydrophilic colloid, 62, 113, 137 



Hydrophily, 134, 135 



Hydrophobic wall surfaces, 193 



Hydrophyte, 99 



Hydropot cells, 125 



Hydrostatic-pneumatic system, in trees, 161 



Hydrostatic pressure, 44, 45, 144, 192 

 minimum, 108 



Hydroxyl ion, high migration velocity of, 13, 40 



Hygrometers, 186 



Hypertonic solution, 81, 126 



Hypostomatal leaves, 187 



Hypotonic environment, 124, 125, 126 



Hysteresis, 64 



