SUBJECT INDEX 



185 



Humus theory, 1, 135 

 Hydration, of ions, 57 

 Hydrogen ion concentration (pH), 



38, 41, 52-5, 98 

 Hydrogen ions, 77 

 exchange of, 74, 85, 132, 138, 141, 



143 

 excretion of, 86 

 in soils, 138 

 Hydroxyl ions, 50, 52, 77, 91, 138, 



140 

 Hypericum spp., 162 



I 



Immobile ions, 35 



Indole-3-aceticacid, 64 



Influx, 27 



Inherent factors, 65-71 



Inhibitors, 64, 92 



Interactions between ions, 57-62 



Internal concentration, 



of salts, 65-6,67 

 sugars, 66-7 

 Intrability, 28 



Intracellular location of ions, 22 

 Invagination, 



of the plasmalemma, 1 05-6 

 Iodide, effect on chloride absorption, 



58 

 Iodine, 4 

 lodoacetate, 92 

 Ion, 



antagonism, 58-62, 152 



exchange, 11, 12, 32-3, 40. 42, 47, 

 74-5, 145 

 resins, 37-8 



fluxes, 102 



transport mechanisms, 27-45 

 Iron, 121 



an essential element, 6 



content ofZea mays, 3 



functions of, 8 



in chloroplasts, 108 



precipitation in soils, 146 



transport out of cotyledons, 128 

 Isotopes, {see radioactive isotopes) ■ 

 Ivaoraria, 157-8 



Jiincus gerardi. 



J 



157-8 



K 



Kaolin ite clays, 142 

 Kidney bean, {see Phaseohis vulgaris) 

 Kohl-rabi, {see Brassica caulorapa) 

 Krebs cycle, 91-2,106 



Labile binding, 39, 75 



Lactuca sativa{\QiiucQ), 70, 144, 151 



Lamiuaria spp., 4, 153 



Langmuir equation, 36, 45, 55-6 



Lanthanum, 62 



Leakage of salts, 27, 55, 65, 133 



Leaves, 



export of salt from, 125-6 



leaching of, 133 



salt absorption by, 21,129-31 



transport of calcium across, 21,50 

 Le Chatelier's principle, 29 

 Lecithin. 45, 87 

 Lecithinase, 87 

 Legumes, 140, 141 

 Lemnaspp.{d\ickwQQd), 21.129 

 Light, 48-9,69,109-10 

 Lime, 139,146 

 Limonium gmeiiuii, 157, 160-1 

 Limouium latifolium, 161-2 

 Lifium sp. (flax), 4, 1 50 

 Lipid hypothesis, 10 

 Lithium, 58-59 

 Low-salt roots, 14, 65 

 Lundegdrdh hypothesis, 77-84, 107 

 Lupimis angustifolius (lupin), 1 44 

 Lycopersicon esculentum (tomato), 5 1 , 



63,122, 126, 152 

 Lycopodium spp. , 4 



M 



Magnesium, 

 absorption of, 60 

 an essential element, 6 

 binding in soils, 138 

 concentration in cell sap, 5,11 

 sea water, 11,154 

 soil solutions, 137 

 xylemsap, 124-5 

 functions of, 8 

 uptake by leaves, 1 32 

 Maize {seeZea mays) 

 Malate, 92 

 Malonate, 92 



