688 



SUBJECT INDEX 



Light, role in photosynthesis, 347-354 



Light duration, effect of, 

 on growth, 601-607 

 on photosynthesis, 353-354 



Light intensity, effect of, 



on growth, 596-599, 644, 660 

 on photosynthesis, 348-352, 357 

 on phototropism, 657-660 



Light quaHty, effect of, 

 on growth, 599-601 

 on photosynthesis, 352-353 

 on phototropism, 657, 658 

 on stomatal opening, 184 

 on pulvinal movements, 669 



Lignin, 68-69 



Limiting factors, principle of, 337- 

 340, 588, 643 



Lipases, 395, 466, 471 



Lipids, 71-72, 390-391, 397-399 



Longevity of seeds, 636-637 



Lutein, 315 



Lycopene, 315 



Lyotropic series, 112-113, 123-124 



Magnesium, role of, 314, 422, 554 

 Malic acid, 519, 520 

 Maltase, 374, 377, 469 

 Maltose, 374,^77 

 Manganese, role of, 314, 424, 554 

 Mannose, 372 



Mass flow hypothesis of solute trans- 

 location, 498-502 

 Maturation phase of growth, 269, 



557-559 

 Melezitose, 374 

 Membranes, 11 7-1 18 



differentially permeable, 118, 119, 



126-127 

 multicellular, 119, 279 

 of plant cells, 118-119 

 Meristems, 269-270, 550-551, 55^- 



559, 563 

 Methyl glyoxal, 543, 544 

 Micelles in cell walls, 66-67 

 Micropyle, 625 

 Middle lamella, 60, 64, 65 

 Milliequivalent, 407 



Mineral element deficiency, symp- 

 toms of, 427, 428-429, 430 



Mineral elements, 



redistribution in plants, 415, 423, 



^ 424, 498 

 roles in plants, 415-417, 420-427, 

 609-610 



Mineral matter of soil, 246-247 



Mineral salts, 



absorption of, 408-412 

 export of from leaves, 497-498 

 translocation of, 491-497 



Moisture equivalent, 257 



Mol, 10 



Molar solutions, 10 



Monosaccharides, 72, 367, 371-373 



Movement of water, 



cohesion of water theory, 233-236 

 role of "root pressure," 231-233 

 "vital" theories of, 229-231 



Movement of water, downward, 242- 



243 

 Movement of water, lateral, 242 

 Movement of water, upward, 215- 



217 

 rate of, 242 

 relation of transpiration to, 166, 



241-242 

 Movements of plants, 653-655 

 Mucilages, 70, 380-381 

 Multiple causation, principle of, 588, 



621 

 M5'corrhizas, 457-458 



Nastic movements, 653, 654, 664- 



665 

 Neutralization, 14 

 Nicotine, 450 

 Nitrates, 



absorption of, 438-440 



reduction in plants, 440-441 

 Nitrification, 456 

 Nitrogen, 



relation to carbohydrate metabol- 

 j'sni, 450-453 



role in anthocyanin synthesis, 384 



