This journal provides immediate access to some articles. Volume 29(4); July 1954 Articles A Porphyrin Pigment from Photosensitive Non-chlorophyllous Plant Tissues. PMCID: PMC540525 Position of C14 in Alcohol and Carbon Dioxide Formed from Labeled Glucose by Corn Root Tips. PMCID: PMC540526 The Direct Oxidation Pathway in Plant Respiration. PMCID: PMC540527 Investigation into the Function of Pyridoxin as a Growth Factor for Excised Tomato Roots. PMCID: PMC540528 Studies on the Chemistry of the Living Bark of the Black Locust in Relation to Its Frost Hardiness. VII. A Possible Direct Effect of Starch on the Susceptibility of Plants to Freezing Injury. PMCID: PMC540529 The Availability of Magnesium from Organic Carriers in Artificial Substrates. PMCID: PMC540530 Translocation of Radioactive Isotopes from Various Regions of Roots of Barley Seedlings. PMCID: PMC540531 Effect of Differential Nitrogen, Potassium, and Magnesium Supply to Young Valencia Orange Trees in Sand Culture on Mineral Composition Especially of Leaves and Fibrous Roots. PMCID: PMC540532 The Influence of Mineral Nutrition on the Organic Acids of the Tomato, Lycopersicum esculentum. PMCID: PMC540533 Nitrogenous Constituents of Sap Exuded from the Sapwood of Acer saccharum. PMCID: PMC540534 Studies in Plant Metabolism. IV. Comparative Effects of 2,4-Dichlorophenoxyacetic Acid and Other Plant Growth Regulators on Phosphorus Metabolism in Bean Plants. PMCID: PMC540535 Promotion by Zinc of the Formation of Cytochromes in Ustilago sphaerogena. PMCID: PMC540536 Auxin Physiology in Bean Leaf Stalks. PMCID: PMC540537 Incorporation of Radioactive Glutamic Acid into the Proteins of Higher Plants PMCID: PMC540538 The Effect of Temperature on the Behavior of Malic Acid and Starch in Leaves of Bryophyllum calycinum Cultured in Darkness. PMCID: PMC540539 Book Review BIOCHEMICAL PREPARATIONS PMCID: PMC540545 Brief Papers: Smog Injury and Rust Infection. PMCID: PMC540540 Precursor Relationships in Light Activated Accumulation of Niacin in Leaf Disks from Normal, Light-starved, and Zinc Deficient Tomato Plants. PMCID: PMC540541 Assay of Cytochrome Oxidase Activity of Sunflower Leaf Tissue in Relation to pH Value and Cation Concentration of the Buffer. PMCID: PMC540542 The Effect of Carbon Monoxide on Respiration in Higher Plants. PMCID: PMC540543 Nomenclature of Chemical Plant Regulators—A Criticism PMCID: PMC540544 Journal Matter Original table of contents page Administrative content — journal masthead, notices, indexes, etc. | ||