Inhalt· Contents

Originalarbeiten • Original Papers

ABOU-MANDOUR, A. A.: Untersuchungen iiber Cytokinine parasitischer Herkunft III. Cytokinin-Aktivitaten bei Melampyrum und Lathraea sowie bei Blattgallen an Populus, Fagus und Quercus Investigations on Cytokinins of Parasitic Origin III. Cytokinin-activities in Melampyrum and Lathraea and in Galls on Leaves of Populus, Fagus and Quercus . . . . . . . . . 59

ATHANASSIOUS, R.: Ozone Effects on Radish (Raphanus sativus L. cv. Cherry Belle): Gradient of Ultrastructural Changes . . . . . . . . . . . . . . 227

ATKINS, C. A., R. RAINBIRD, and]. S. PATE: Evidence for a Purine Pathway of Ureide Synthesis in N 2-fixing Nodules of cowpea [Vigna unguiculata (L.) WALP.] . . . 249

VAN BALEN, E., S. C. VAN DE GEI]N, and G. M. DESMET: Autoradiographic Evidence for the Incorporation of Cadmium into Calcium Oxalate Crystals. .... 123

BECKER, H. und ]. EXNER: Vergleichende Untersuchungen von Misteln verschiedener Wirtsbaume an Hand der Flavonoide und Phenolcarbonsaure Comparative Studies of Flavonoids and Phenylcarboxylic Acids of Mistletoes from Different Host Trees . . . . . . . . . . . . . . . . . 417

BERLIN, J.: Para-Fluorophenylalanine Re~istant Cell Lines of Tobacco. . . 317

BRABER, J. M.: Catalase and Peroxidase in Primary Bean Leaves during Development and Senescence . . . . . . . . . . . . . . . .. 135

BUCHANAN-BoLLIG, I. c., M. KLUGE, and U. LUTTGE: PEP-Carboxylase Activities and the Regulation of CAM: Effects of Extraction Procedures and Leaf Age . . . . 457

DECLEIRE, M. et G. VAN ROEY: Effects de Divers Herbicides sur l'Activite de la Glut­amine Synthetase dans des Plantules de Concombre (Cucumis sativus) Effects of Various Herbicides on the Activity of Glutamine Synthetase in Cucumber Seedlings (Cucumis sativus) . . . . . . . . . . . . .. 361

DE MEILLON, S., ]. H. VISSER, and N. GROBBELAAR: A Standard Technique for Main­taining Constant Conditions for the Germination of the Minute Seeds of Striga asiatica (L.) KUNTZE ............. . . . . 115

DOLLARD, G. J. and N. W. LEPP: Differential Mobility of Lead and Zinc in Phloem Tissue of Sycamore (Acer pseudoplatanus L.) . . . . . . . . . . 409

FRANCESCHI, V. R. and H. T. HORNER Jr.: A Microscopic Comparison of Calcium Oxalate Crystal Idioblasts in Plant Parts and Callus Cultures of Psycho tria punctata (Rubiaceae) ...... ...... 449

GEMMRICH, A. R.: Developmental Changes in Microbody Enzyme Activities in Ger­minating Spores of the Fern Pteris vittata . . . . . . . . . . . . . . . 153

GRIERSON, D., ]. R. THOMPSON, R. GARCIA-MoRA, and R. J. SLATER: Ribonucleic Acid Synthesis by Isolated Mung Bean Nucleoli . . . . . . 437

HAHN, H. and D. SERVOS: The Isolation of Multiple Forms of DNA-dependent RNA Polymerases from Nuclei of Quiescent Wheat Embryos by Affinity Chromatography 43

HARTMANN, E., I. GRASMUCK, N. LEHRBACH, ~nd R. MULLER: The Influence of Acetyl­choline and Choline on the Incorporation of Phosphate into Phospholipids of Etio-lated Bean Hypocotyl Hooks ..... .......... 377

HEBANT, CH. and E. DE FAY: Functional Organization of the Bark of Hevea brasiliensis (Rubber Tree): A Structural and Histoenzymological Study.. ...... 391

IV

HEILMANN, B., W. HARTUNG, and H. GIMMLER: The Distribution of Abscisic Acid between Chloroplasts and Cytoplasm of Leaf Cells and the Permeability of the Chloroplast Envelope for Abscisic Acid 67

HENSEL, W. and T.-H. IVERSEN: Ethylene Production during Clinostat Rotation and Effect on Root Geotropism . :;43

IVERSEN, T.-H. and C. BAGGERUD: Myrosinase Activity in Differentiated and Un-differentiated Plants of Brassicaceae . 399

JUNTTILA, O. and A. NILSEN: Stimulation of Phalaris Seed Germination by Respiratory Inhibitors and Oxidising Agents 429

KAJITA, S., C. MATSUI, K. SYONO, M. SUZUKI, and T. NAGATA: Fine Structure of Fusion Bodies Formed between Pea Root Nodule and Tobacco Mesophyll Protoplasts. 233

KIRST, G. 0.: Phosphate Transport in Plalymonas subcordi/ormis after Osmotic Stresses 289

KLUGE, M., M. BOCHER, and G. JUNGNICKEL: Metabolic Control of Crassulacean Acid Metabolism: Evidence for Diurn::t!ly Changing Sensitivity Against Inhibition by Malate of PEP-Carboxylase in Kalanchoe tubi/lora HAMET . 197

KOCHHAR, T. S.: Effect of Abscisic Acid and Auxins on the Growth of Tobacco Callus 1

LANE, S. D. and E. S. MARTIN: Further Observations on the Distribution of Lead in Juvenile Roots of Raphanus sativus . 145

MURPHY, ]. B., ]. B. MURPHY, and T. L. NOLAND: Activity of L-Phenylalanine Am-monia-Lyase during Stratification and Germination of Sugar Pine Seeds . 161

NABORS, M. W., S. E. GIBBS, C. S. BERNSTEIN, and M. E. MEIs: NaCl-Tolerant Tobacco Plants from Cultured Cells. 13

NAITO, K., T. TAKAHASHI, Y. ENDO, and S. SHIMIZU: Benzyladenine-induced Chlorophyll Formation in Etiolated Cucumber Cotyledons: Differential Responses of Cl-amino­levulinic Acid Formation to Inhibitors of RNA and Protein Synthesis in Darkness and then after Illumination . 309

NIEMANN, G. ]., TH. K. F. SCHULZ, H. H. VAN GENDEREN, and W. J. BAAS: Investiga-tions on Roya species. IV. Leaf Phenolics and Leaf-Wax Triterpcnes of Roya australis R. BR. ex TRAILL in Relation to Leaf Age . 241

OBATA-SASAMOTO, H. and H. SUZUKI: Activities of Enzymes Relating to Starch Syn­thesis and Endogenous Levels of Growth Regulators in Starch-accumulating Potato Callus Cultures 35

RABE, R. und K. H. KREEB: Wirkungen von S02 auf die Enzymaktivitiit 111 Pflanzen­bliittern Effects of S02 upon Enzyme Activity in Plant Leaves 215

RAO, 1. M., P. M. SWAMY, and V. S. R. DAS: Influence of Paraquat and 2,4,5-T on the Leaf Chlorophyll Content of Six Shrub Species . 189

RYBOVA, R., K. JANACEK, and M. KLEINOVA-SLAV1KOVA: Light-Dependent pH Changes in Suspensions of the Alga Rydrodictyon reticula tum . 5

SCHERER, H. W. and W. HOFNER: Wechselwirkungen von Fe, Mn und Zn bei Aufnahme und Transport durch Mais (Zea mays L.) und Sonnenblumen (Relianthus annuus L.) Interactions of Iron, Manganese, and Zinc during Uptake and Transport by Maize and Sunflower 25

SPEDDING, D. ]., 1. ZIEGLER, R. HAMPP, and H. ZIEGLER: Effect of pH on the Uptake of 35S-sulfur from Sulfate, Sulfite, and Sulfide by Chlorella vulgaris . 205

SPERANZA, A. and G. L. CALZONI: Compounds Released from Incompatible Apple Pollen during in vitro Germination . 95

SRINIVASAN, C. and M. G. MULLINS: Flowering in the Grapevine (Vilis vini/era L.): Histochemical Changes in Apices during the Formation of the Anlage and its Derivatives . 299

v

STELZER, R. and A. LAUCHLI: Salt- and Flooding Tolerance of Puccinellia peisonis IV. Root Respiration and the Role of Aerenchyma in Providing Atmospheric Oxygen to the Roots . . . . . . . . . . . . . . . . . . . . . . . . . 171

SUTFELD, R. und R. WIERMANN: Die Entwicklung zweier o-Dihydroxyphenol O-Methyl­transferasen wahrend der Mikrosporogenese von Tulipa cv. d),peldoorn» The Development of Two o-Dihydricphenol O-Methyltransferases during Micro­sporogenesis of Tulipa cv. «Apeldoorn» . . . . . . . . . . . . . . . . 283

TORRIGIANI, P. and D. SERAFINI FRACASSINI: Early DNA Synthesis and Polyamines in Mitochondria from activated Parenchyma of Helianthus tuberosus. . . . .. 353

WEIGEL, H.-J. and H.-J. JAGER: Different Effects of Cadmium in vitro and in vivo on Enzyme Activities in Bean Plants (Phaseolus vulgaris L. c. v. Sankt Andreas) 103

WIETSCHEL, G. und H. REZNIK: Die Flavonoid-Muster der knollentragenden Solanum­Arten II. Die Flavonoid-Glycoside der Arten aus Series I-XVI The Flavonoid Patterns of Tuber-Bearing Solanum-Species II. The Flavonoid Glycosides of the Species from Series I-XVI . . . . . . . 79

WILD, A. and G. WOLF: The Effect of Different Light Intensities on the Frequency and Size of Stomata, the Size of Cells, the Number, Size and Chlorophyll Content of Chloroplasts in the Mesophyll and the Guard Cells during the Ontogeny of Primary Leaves of Sinapis alba. . . . . . . . . . . . . , . . . . . 325

YANG, Y.-W. and W.-C. CHANG: Embryoid Formation and Subsequent Plantlet Regen-eration from Callus Culture of Thalictrum urbaini HAYATA (Ranunculaceae) . . . 19

Kurze Mitteilungen • Short Communications

ATHANASSIOUS, R.: Ozone Effects on Radish (Raphanus sativus L. cv. Cherry Belle): Foliar Sensitivity as Related to Metabolite Levels and Cell Architecture. . 183

DE LA HARPE, A. c., J. H. VISSER, and N. GROBBELAAR: Photosynthesis of Certain South African Parasitic Flowering Plants ............... 277

DAVE, I. C. and S. KANNAN: Boron deficiency and its Associated Enhancement of RNase Activity in Bean Plants . . . . . . . . . . . . . . . . . . 261

DODDS, J. H. and TH. L. REYNOLDS: A Scanning Electron Microscope Study of Pollen Embryogenesis in Hyoscyamus niger . . . . . . . . . . . . . . . . . 271

HARTUNG, W. and A. A. ABOU-MANDOUR: Abscisic Acid in Root Cultures of Phaseolus coccineus L. . . . . . . . . . . . . . . . . . . . . . . . . . 265

HILGENBERG, W., G. SANDMANN und F. HOFMANN: Der EinfluB von Indol-3-Essigsaure auf das Wachs tum von Phycomyces blakesleeanus und deren quantitative Bestim­mung im Pilz The Influence of Indole-3-acetic Acid on the Growth of Phycomyces blakesleeanus and its Quantitative Determination in the Fungus . . . . . . . . . 89

HUBER, W. and N. SANKHLA: Effect of Abscisic Acid on Betaine Accumulation in Pennisetum typhoides seedlings. . . . . . . . . . . . . . . . . . . 179

McDOUGALL, J. and J. R. HILLMAN: Distribution of Indole-3-Acetic Acid in Shoots of Phaseolus vulgaris L. . . . . . . . . . . . . . . . . . . . . . . 367

SWAMY, P. M., P. UMAPATHIE, and S. B. N. REDDY: Involvement of PP Pathway Enzymes in the Dormancy of Peanut (Arachis Hypogaea L.) Seeds . . . . . . . . . 373