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This journal provides immediate access to some articles. Volume 34(4); July 1959 Articles Studies on Auxin-membrane Permeability Relations in Fruit and Leaf Tissues PMCID: PMC541210 Some Metabolic Responses of Alfalfa Seedlings to Freezing. PMCID: PMC541211 Metabolism of C14-Bicarbonate, P32-Phosphate, or S35-Sulfate by Lettuce Seed during Germination. PMCID: PMC541212 Mechanisms of action of Polymyxin B on Chlorella and Scenedesmus. PMCID: PMC541213 On the Occurrence of Free-galacturonic Acid in Apples and Tomatoes. PMCID: PMC541214 Enzyme Activation in Wheat Grains in Relation to Water Content. Glutamic Acid—Alanine Transaminase, and Glutamic Acid Decarboxylase. PMCID: PMC541215 Methods for the Extraction of Enzymes from Cereal Leaves with Especial Reference to the Triosephosphate Dehydrogenases. PMCID: PMC541216 Effects of Artificial Increases in Sugar Content on Frost Hardiness. PMCID: PMC541217 Distribution and Properties of Isocitritase in Plants. PMCID: PMC541218 Changes in Endogenous Growth Substances during Flower Development. PMCID: PMC541219 Inverse Effects of Gibberellin on Peroxidase Activity and Growth in Dwarf Strains of Peas and Corn. PMCID: PMC541220 Effect of Light upon the Behaviour of Citric Acid in Leaves of Bryophyllum Calycinum Salisb. PMCID: PMC541221 Respiratory and Associated Responses of Carrot Disc to Substituted Phenols. PMCID: PMC541222 Studies on the Mechanism of Herbicidal Action of 2-Chloro-4,6-Bis(Ethylamino)-S-Triazine. PMCID: PMC541223 Comparison of the Nucleic Acid, Total Nitrogen, and Protein Nitrogen Levels of Normal and Tumor Tissue under Similar Growth Conditions. PMCID: PMC541224 Physiology of Growth and Reproduction in Rice. II. Effect of Plant Growth Substances on Three Winter Varieties. PMCID: PMC541225 Effects of Iron and Chelating Agents on Dark Carboxylation Reactions in Plant Homogenates. PMCID: PMC541226 Loss of Phosphorus-32 by Plant Roots after Foliar Application. PMCID: PMC541227 Germination of Light Sensitive Seed in Crossed Gradients of Temperature and Light PMCID: PMC541228 Studies on the Mechanism of Stem Growth Inhibition by Visible Radiation. PMCID: PMC541229 Growth Responses of Alaska Pea Seedlings to Visible Radiation and Gibberellic Acid. PMCID: PMC541230 Endogenous Substrates of Dormant, Activated and Germinating Ascospores of Neurospora Tetrasperma. PMCID: PMC541231 Influence of Temperature on the Response of Germinating Barley Grains to Potassium Gibberellate. PMCID: PMC541232 Phosphorus Compounds of Cotton Embryos and Their Changes during Germination. PMCID: PMC541233 Winter Freezing in Relation to the Rise of Sap in Tall Trees. PMCID: PMC541234 News and Notes PMCID: PMC541235 Journal Matter Original table of contents page Administrative content — journal masthead, notices, indexes, etc. | ||