SUBJECT INDEX 



Accumulation, 

 definition of, 27 

 in model systems, 41, 74 

 in plants, 3,4,9,12,68,101,107, 

 111, 120-1, 156-8 



Accumulator plants, 157 



Acetate, 140 



Acetyl-choline, 87 



Acid-base carriers, 75-7 



Acidity, influence on salt uptake, 52-5 



Activation energy, 30 



Active transport, 

 definition of, 12, 27 

 efficiency of, 41,76,80-3,86 

 in plants, 9,120,164 

 mechanisms of, 40-6, 75-90 

 Adenoid activity, 10 

 Adenosine diphosphate (ADP), 86 

 Adenosine triphosphate (ATP), 85-8 

 Adsorption, 10, 12, 27, 40, 47, 75 

 by cell walls, 104 

 by charcoal, 37 

 characteristics of, 35-8 

 exchange, 37, 40 

 isotherm, 36-7, 45, 55-6 

 sites in cells, 55, 75 

 tracks, 80 

 Aeration, 

 eff"ect on salt absorption, 114, 117 

 of culture solutions, 26 

 Aerobic metabolism 



dependence of salt absorption on, 

 11 

 Agropyron repens (couch grass), 144 

 Algae, 

 structure of, 1 8-20 

 use in salt absorption experiments, 

 50, 57, 84, 152-5 

 Alkali cations {see potassium, sodium, 



etc.) 

 Alkali disease, 4 

 Alkali earth cations {see calcium, 



magnesium, etc.) 

 Allium cepa (onion), 21, 104, 144, 151 

 Aluminium, 3-4, 62 

 Amino-acids, 45, 87, 124 



Ammonium ions, 6, 82, 113 

 Amphoteric, 



adsorbents, 38 



carriers, 44-5, 87-8 



properties of proteins, 38 

 Anaerobic organisms, 82 

 Analysis, of plant materials, 23-5 

 Anatomy, of roots, 15 



Angiosperms, 



absorption of salts by, 13, 14, 21, 



67, 70, 111-7 

 structure of the root in, 15 

 transport of salts in, 10, 1 17-29 



Anion, 



absorption from soil, 140-1 

 absorption mechanisms, 42-5, 77- 



80 

 exchange capacity of soils, 137-8 

 respiration, 77-8 



Anions, 

 elements absorbed as, 6 



{see also; nitrate, phosphate, 



sulphate, etc.) 

 Antagonism, 58-62, 152 

 Apatite, 138 

 Apparatus, 26 

 Apparent free space (AFS), 97-104, 



118 

 Apple {see Mai us sylvestris). 

 Apricot {see Prunus armeniaca). 

 Aquatic angiosperms, 21 

 Arachis hypogaea (peanut), 128 

 Arsenate, 58,110,140 

 Artichoke, Jerusalem {see Helianthus 



tuberosus). 

 Ascorbic acid oxidase, 81 



Ash, 



analysis, 23-5 



content oiZea mays, 3 

 Aster tripolium (sea aster), 70, 156 

 Astragalus spp., 4, 71 

 Atriplex spp., 70-1, 157 

 Autoradiography, 22, 132 

 Auxin, 64 



Avena saliva (oat), 4, 70, 126-7, 144 

 azaguanine, 64 

 Azide, 1 10 



181 



13 



M.S.A.P. 



