This journal provides immediate access to some articles. Volume 40(1); January 1965 Porphyrins and the iron requirement for chlorophyll formation in Euglena. PMCID: PMC550230 Oxygen Uptake and Evolution Following Monochromatic Flashes in Ulva and an Action Spectrum for System I. PMCID: PMC550231 Dark Transformations of Phytochrome in vivo. II PMCID: PMC550232 Auxin Transport in Geotropic Curvatures of a Branched Plant PMCID: PMC550233 Red Light and the Geotropic Response of the Avena Coleoptile PMCID: PMC550234 Evidence for Translocation of Iron in Plants PMCID: PMC550235 Catabolism of Pyrimidines in Rape Seedlings PMCID: PMC550236 Conversion of Nicotine to Nornicotine in Grafts between Cherry-red Tobacco and Related Materials PMCID: PMC550237 Metabolic changes associated with the germination of corn. II. Nucleic acid metabolism. PMCID: PMC550238 Adenosyl-methionine incorporation into the methoxylated carotenoids in chromatophores of Rhodospirillum rubrum. PMCID: PMC550239 Relationship Between Red Light Mediated Glyceraldehyde-3-Phosphate Dehydrogenase Formation and Light Dependent Development of Photosynthesis PMCID: PMC550240 The effect of kinetin on nucleic acids and nucleases of excised barley leaves. PMCID: PMC550241 Comparison of incorporation and metabolism of RNA pyrimidine nucleotide precursors in leaf tissues. PMCID: PMC550242 The Effect of Temperature upon Translocation of C14 in Sugarcane PMCID: PMC550243 Natural Variations in the Physiological Characteristics of Growing Chlorella Cultures PMCID: PMC550244 The Morphogenetic Effect of Oxygen on Roots PMCID: PMC550245 Light and Dark C14O2 Fixation by Spinach Leaf Systems PMCID: PMC550246 Changes in Abscission Processes with Aging PMCID: PMC550247 Calcium Accumulation by Maize Mitochondria PMCID: PMC550248 Photomorphogenic Responses of Dodder Seedlings PMCID: PMC550249 Auxin Transport in Flowering and Vegetative Shoots of Coleus blumei Benth. PMCID: PMC550250 Translocation of C14 Metabolites in the Phloem of the Bean Plant PMCID: PMC550251 Flavonoids and related phenolic compounds produced in the first internode of Sorghum vulgare Pers. in darkness and in light. PMCID: PMC550252 Changes in Calcium Levels in Cell Walls during Elongation of Oat Coleoptile Sections PMCID: PMC550253 The soluble leucine pool in maize root tips. PMCID: PMC550254 The effect of leucine on the biosynthesis of leucine in maize root tips. PMCID: PMC550255 Expansion of Bean Leaves and its Suppression by Salinity PMCID: PMC550256 Comparison of Mitochondria from Tomato Fruits at Various Stages of Ripeness PMCID: PMC550257 Physiological effects of gibberellic acid. 8. Growth retardants on barley endosperm. PMCID: PMC550258 Penetration of Organic Compounds Through Isolated Cuticular Membranes with Special Reference to C14 Urea PMCID: PMC550259 Effect of some (2-chloroethyl) trimethylammonium chloride analogs and other growth retardants on gibberellin biosynthesis in Fusarium moniliforme. PMCID: PMC550260 Formic Acid Activation in Plants. I. Purification, Properties and Distribution of Formyltetrahydrofolate Synthetase PMCID: PMC550261 Formic Acid Activation in Plants. II. Activation of Formyltetrahydrofolate Synthetase by Magnesium, Potassium, and Other Univalent Cations PMCID: PMC550262 Inhibition of protein synthesis and of auxin-induced growth by chloramphenicol. PMCID: PMC550263 News and Notes PMCID: PMC550264 Journal Matter Original table of contents page Administrative content — journal masthead, notices, indexes, etc. | ||