D. Stuart Letham
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D. Stuart Lethambiology Degrees
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Molecular Biology
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Biochemistry
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Chemistry Biology
D. Stuart Letham's Degrees
- PhD Biochemistry University of California, Berkeley
- Bachelors Chemistry Stanford University
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(Suggest an Edit or Addition)D. Stuart Letham's Published Works
Number of citations in a given year to any of this author's works
Total number of citations to an author for the works they published in a given year. This highlights publication of the most important work(s) by the author
Published Works
- Inhibition of cyclin-dependent kinases by purine analogues. (1994) (591)
- Phytohormones and related compounds : a comprehensive treatise (1978) (437)
- ZEATIN, A FACTOR INDUCING CELL DIVISION ISOLATED FROM ZEA MAYS. (1963) (225)
- Chemistry and Physiology of Kinetin-Like Compounds (1967) (199)
- Cytokinin controls the cell cycle at mitosis by stimulating the tyrosine dephosphorylation and activation of p34cdc2-like H1 histone kinase (2004) (197)
- Control of axillary bud initiation and shoot architecture in Arabidopsis through the SUPERSHOOT gene. (2001) (191)
- Regulators of Cell Division in Plant Tissues XII. A Cytokinin Bioassay Using Excised Radish Cotyledons (1971) (179)
- Correlation of xylem sap cytokinin levels with monocarpic senescence in soybean. (1990) (142)
- Regulators of cell division in plant tissues (1963) (140)
- Detection of cytokinins in a seaweed extract (1985) (114)
- Effects of elevated [CO(2)] and nitrogen nutrition on cytokinins in the xylem sap and leaves of cotton. (2000) (112)
- Cytokinin Biochemistry in Relation to Leaf Senescence : II. The Metabolism of 6-Benzylaminopurine in Soybean Leaves and the Inhibition of Its Conjugation. (1987) (101)
- Cytokinins from Zea mays (1973) (94)
- Cytokinin biochemistry in relation to leaf senescence. VII. Endogenous cytokinin levels and exogenous applications of cytokinins in relation to sequential leaf senescence of tobacco (1992) (90)
- Effect of cytokinins supplied via the xylem at multiples of endogenous concentrations on transpiration and senescence in derooted seedlings of oat and wheat (1996) (87)
- Quantitation of cytokinins in biological samples using antibodies against zeatin riboside. (1984) (82)
- Phytohormones, Rhizobium Mutants, and Nodulation in Legumes : III. Auxin Metabolism in Effective and Ineffective Pea Root Nodules. (1983) (78)
- Regulators of Cell Division in Plant Tissues VUI. The Cytokinins of the Apple Fruit (1969) (78)
- Mass Spectrometric Quantification of Indole-3-Acetic Acid in Rhizobium Culture Supernatants: Relation to Root Hair Curling and Nodule Initiation (1982) (74)
- Cytokinin Biochemistry in Relation to Leaf Senescence: IV. Cytokinin Metabolism in Soybean Explants. (1988) (74)
- Mass spectrometric analysis of cytokinins in plant tissues : v. Identification of the cytokinin complex of datura innoxia crown gall tissue. (1983) (73)
- The effect of auxin on cytokinin levels and metabolism in transgenic tobacco tissue expressing an ipt gene (1995) (70)
- Regulators of cell division in plant tissues (1967) (70)
- Cytokinin translocation and metabolism in lupin species. I. Zeatin riboside introduced into the xylem at the base of Lupinus angustifolius stems. (1987) (69)
- The binding of kinetin to plant ribosomes. (1970) (67)
- Regulators of cell division in plant tissue. XXIII. The identity of an unusual metabolite of 6-benzylaminopurine. (1975) (66)
- Regulators of cell division in plant tissues—II. A cytokinin in plant extracts: Isolation and interaction with other growth regulators☆ (1966) (65)
- Regulators of cell division in plant tissues—III (1967) (65)
- Inhibitors of two enzymes which metabolize cytokinins (1986) (64)
- Cytokinins and Their Relation to Other Phytohormones (1969) (61)
- The Ribonucleic Acids (1977) (61)
- Preparation and characterization, using high-performance liquid chromatography, of an enzyme forming glucosides of cytokinins. (1979) (60)
- Mass spectrometric analysis of cytokinins in plant tissues. II—Quantitation of cytokinins in Zea mays kernels using deuterium labelled standards (1979) (59)
- The Metabolism and Translocation of Zeatin in Intact Radish Seedlings (1974) (58)
- Phytohormones,Rhizobium mutants, and nodulation in legumes. IV. Auxin metabolites in pea root nodules (1984) (57)
- 6-benzylaminopurine and its glycosides as naturally occurring cytokinins (1989) (57)
- The complex of O-glucosylzeatin derivatives formed in Populus species☆ (1979) (56)
- Regulators of Cell Division in Plant Tissues. XX. The Cytokinins of Coconut Milk (1974) (55)
- Cytokinin biochemistry in relation to leaf senescence. VI. Effect of nitrogenous nutrients on cytokinin levels and senescence of tobacco leaves (1992) (55)
- Cytokinin biochemistry in relation to leaf senescence. VIII: translocation, metabolism and biosynthesis of cytokinins in relation to sequential leaf senescence of tobacco (1992) (54)
- IDENTITY OF KINETIN-LIKE FACTORS FROM ZEA MAYS (1965) (53)
- Regulators of cell division in plant tissues. XVI (1973) (49)
- Mass spectrometric identification of indole compounds produced by Rhizobium strains (1982) (49)
- Influence of ethylene on cytokinin metabolism in relation to Petunia corolla senescence (1999) (48)
- Enzymic glucosylation of the cytokinin, 6-benzylaminopurine (1979) (47)
- Regulators of cell division in plant tissues (1974) (46)
- The Structure and Synthesis of Cytokinin Metabolites. 1. The 7- and 9-β-D-Glucofuranosides and Pyranosides of Zeatin and 6-Benzylaminopurine (1978) (45)
- Purification and probable identity of a new cytokinin in sweet corn extracts (1966) (45)
- The Structure and Synthesis of Cytokinin Metabolites. II. Lupinic Acid and O-β-D-Glucopyranosylzeatin From Lupinus angustifolius (1978) (44)
- O-glucosylzeatin and Related Compounds—A New Group of Cytokinin Metabolites (1977) (43)
- The separation of plant cells with ethylenediaminetetraacetic acid. (1960) (42)
- Studies of Cytokinin Action and Metabolism Using Tobacco Plants Expressing either the ipt or the GUS Gene Controlled by a Chalcone Synthase Promoter. I. Developmental Features of the Transgenic Plants (1997) (40)
- The occurrence of raphanatin as an endogenous cytokinin in radish seed Identification and quantitation by gas chromatographic—mass spectrometric analysis using deuterium‐labelled standards (1977) (39)
- Regulators of Cell Division in Plant Tissues1 XIX. THE METABOLISM OF 6-BENZYLAMINOPURINE IN RADISH COTYLEDONS AND SEEDLINGS (1974) (39)
- Mass spectrometry of cytokinin metabolites. Per (trimethylsilyl) and permethyl derivatives of glucosides of zeatin and 6-benzylaminopurine. (1976) (39)
- Identification and quantification of cytokinins in the xylem sap of mistletoes and their hosts in relation to leaf mimicry (1987) (39)
- A spectrophotometric method for the determination of sub-micro quantities of sulphur with 4-amino-4′-chlorodiphenyl (1956) (38)
- Cytokinin synthesis is higher in the Arabidopsis amp1 mutant (2000) (38)
- Raphanatin, an unusual purine derivative and a metabolite of zeatin. (1972) (37)
- Isolation and probable identity of a third cytokinin in sweet corn extracts (1966) (36)
- Biosynthesis of Cytokinin in Germinating Seeds of Zea mays (1990) (32)
- The Identity of Two New Cytokinin Metabolites (1975) (31)
- Evidence for Cytokinin Involvement in Rhizobium (IC3342)-Induced Leaf Curl Syndrome of Pigeonpea (Cajanus cajan Millsp.). (1991) (30)
- An enzyme from lupin seeds forming alanine derivatives of cytokinins (1983) (30)
- Metabolites of Cytokinins (1980) (29)
- Mass spectrometric analysis of cytokinins in plant tissues (1979) (29)
- Purification of factors inducing cell division extracted from plum fruitlets (1963) (29)
- Cultivation of Apple-fruit Tissue in vitro (1958) (29)
- Glucosylation of cytokinin analogues (1978) (29)
- Cytokinin Biochemistry in Relation to Leaf Senescence V. Endogenous Cytokinin Levels and Metabolism of Zeatin Riboside in Leaf Discs from Green and Senescent Tobacco (Nicotiana rustica) Leaves (1992) (27)
- Cytokinin translocation and metabolism in lupin species II. New nucleotide metabolites of cytokinins (1989) (27)
- Mass spectrometry and chromatography of t-butyldimethylsilyl derivatives of cytokinin bases. (1986) (26)
- Regulators of Cell Division in Plant Tissues. XXII* Physiological Aspects of Cytokinin-induced Radish Cotyledon Growth (1975) (26)
- Stimulants of Cell Division in Developing Fruits (1961) (26)
- Inhibition of carnation petal inrolling by growth retardants and cytokinins (2000) (25)
- Separation of plant cells with hexametaphosphate and the nature of intercellular bonding (1962) (24)
- Rhizobium-induced elevation in xylem cytokinin delivery in pigeonpea induces changes in shoot development and leaf physiology. (2014) (24)
- ENZYMATIC SYNTHESIS OF LUPINIC ACID, A NOVEL METABOLITE OF ZEATIN IN HIGHER PLANTS. (1977) (24)
- A cytokinin in soluble RNA from a higher plant. (1967) (23)
- Promotion of shoot development and tuberisation in potato by expression of a chimaeric cytokinin synthesis gene at normal and elevated CO2 levels (2010) (23)
- Lupinic acid, a purinyl amino acid and a novel metabolite of zeatin (1975) (23)
- Metabolism and Translocation of Exogenous Zeatin Riboside in Germinating Seeds and Seedlings of Zea mays (1990) (23)
- The synthesis of radioisotopically labelled zeatin (1971) (22)
- 6-[substituted amino]purines: Synthesis by a new method and cytokinin activity (1969) (22)
- Do rhizobia produce cytokinins? (1991) (21)
- Studies of Cytokinin Action and Metabolism Using Tobacco Plants Expressing either the ipt or the GUS Gene Controlled by a Chalcone Synthase Promoter. IIipt and GUS Gene Expression, Cytokinin Levels and Metabolism (1997) (21)
- Identification of cytokinins in primary crown gall tumours of tomato (1989) (20)
- Synthesis of raphanatin and its 6-benzylaminopurine analogue (1975) (20)
- The Biosynthesis of Cytokinins in Germinating Lupin Seeds (1988) (20)
- Transfer RNA and Cytokinins (1977) (20)
- A procedure for quantification of cytokinins as free bases involving scintillation proximity immunoassay (1995) (19)
- Cytokinin Translocation and Metabolism in Species of the Leguminoseae: Studies in Relation to Shoot and Nodule Development (1981) (19)
- Cytokinin activities of compounds related to zeatin (1972) (19)
- Cytokinin biochemistry in relation to leaf senescence. III. The senescence-retarding activity and metabolism of 9-substituted 6-benzylaminopurines in soybean leaves (1989) (19)
- Cytokinin oxidase-purification by affinity chromatography and activation by caffeic acid (1995) (19)
- The quantitation of adenosine 3′:5′‐cyclic monophosphate in cultured tobacco tissue by mass spectrometry (1981) (18)
- Cytokinins as Phytohormones — Sites of Biosynthesis, Translocation, and Function of Translocated Cytokinin (2019) (18)
- Maceration of Plant-tissues with Ethylene-diamine-tetra-acetic Acid (1958) (17)
- Cytokinin translocation and metabolism in lupin species. III. Translocation of xylem cytokinin into the seeds of lateral shoots of Lupinus angustifolius (1990) (17)
- Expression of the isopentenyl transferase gene is regulated by auxin in transgenic tobacco tissues (2005) (17)
- Effects of root restriction on growth and associated cytokinin levels in cotton (Gossypium hirsutum) (2010) (17)
- Phytohormones,Rhizobium mutants, and nodulation in legumes. VII. Identification and quantification of cytokinins in effective and ineffective pea root nodules using radioimmunoassay (1987) (16)
- Determination of intact zeatin nucleotide by direct chemical ionisation mass spectrometry (1983) (15)
- Cytokinin Control of Monocarpic Senescence in Soybean (1986) (14)
- On the Significance of Cytokinin Binding to Plant Ribosomes (1972) (14)
- Growth Requirements of Pome-Fruit Tissues (1960) (13)
- Hormonal Control of Senescence (1990) (13)
- Regulators of Cell Division in Plant Tissues XIV. The Cytokinin Activities and Metabolism of 6‐Acylaminopurines (1972) (13)
- Substituted xanthines and cytokinin analogues as inhibitors of cytokinin N-glucosylation (1991) (13)
- The synthesis and cytokinin activities of N-(purin-6-yl)amino acids (1971) (12)
- An Overview of Cytokinin Biosynthesis (1990) (12)
- Use of isopentenyladenosine and dihydrozeatin riboside antibodies for the quantification of cytokinins (1987) (12)
- Regulators of Cell Division in Plant Tissues. XXIV. The Effect of Cytokinins on Ribosome Yield from Radish Cotyledons (1975) (12)
- Quantification of cytokinin o-glucosides by negative ion mass spectrometry. (1989) (12)
- Phytohormones and the development of higher plants (1978) (12)
- Seed-specific expression of the isopentenyl transferase gene ( ipt) in transgenic tobacco (1998) (12)
- Phytohormones, Rhizobium mutants, and nodulation in legumes : v. Cytokinin metabolism in effective and ineffective pea root nodules. (1984) (11)
- Structure and synthesis of unusual cytokinin metabolites (1975) (11)
- The biochemistry of phytohormones and related compounds (1978) (11)
- The reported occurrence of 7-glucofuranoside metabolites of cytokinins (1979) (10)
- Effect of growth substances and mineral nutrients on cytokinin levels and senescence of tobacco(Nicotiana rustica)leaves (1992) (9)
- Xylem-Translocated Cytokinin: Metabolism and Function (1990) (9)
- Synthesis of radioactive zeatin riboside and related compounds by alkylation of purine moieties (1990) (8)
- Movement to bark and metabolism of xylem cytokinins in stems of Lupinus angustifolius. (2002) (8)
- 505. The nucleotide sequence in deoxypentosenucleic acids. Part I. The action of mercaptoacetic acid on calf-thymus deoxyribonucleic acid (1956) (8)
- Reversed phase thin layer chromatographic methods for separation of cytokinins (1992) (7)
- Studies in the determination of nucleotide sequence in desoxypentosenucleic acids. (1954) (7)
- 506. The nucleotide sequence in deoxypentosenucleic acids. Part II. The alkaline degradation of calf-thymus aldehydoapurinic acid di(carboxymethyl) dithioacetal (1956) (7)
- Synthesis of a Cytokinin Linked by a Spacer to Dexamethasone and Biotin: Conjugates to Detect Cytokinin-Binding Proteins (2016) (7)
- Phytohormones,Rhizobium mutants, and nodulation in legumes. VI. Metabolism of zeatin riboside applied via the tips of nodulated pea roots (1984) (7)
- Mass spectrometric analysis of cytokinins in plant tissue VII. Quantification of cytokinin bases by negative ion mass spectrometry (1991) (6)
- Radioimmunoassay for quantifying the cytokininscis-zeatin andcis-zeatin riboside and its application to xylem sap samples (1989) (6)
- MASS SPECTROMETRY OF CYTOKININ METABOLITES. PER(TRIMETHYLSILYL) AND PERMETHYL DERIVATIVES OF GLUCOSIDES OF ZEATIN AND 6-BENZYLAMINOPURINE (1977) (6)
- Retardation of soybean leaf senescence and associated effects on seed composition (1987) (6)
- Cytokinin metabolism in Narcissus bulbs: chilling promotes acetylation of zeatin riboside. (2003) (6)
- Effect of Gibberellins and Cytokinins on Development of Parthenocarpic Apples (1969) (6)
- Methods for detecting and distinguish between impurities and pyrimidines on paper chromatograms (1965) (6)
- Identification of a cytokinin in water chestnuts (corms of Eleocharis tuberosa) (1983) (6)
- 507. The nucleotide sequence in deoxypentosenucleic acids. Part III. The nature of the end groups produced by the alkaline hydrolysis of calf-thymus aldehydoapurinic acid di(carboxymethyl) dithioacetal (1956) (6)
- New 3-substituted xanthines : Potent inhibitors of cell plate formation (1989) (6)
- Inhibitors of cytokinin metabolism II. Inhibition of cytokinin-alanine conjugation in soybean leaves and associated effects on senescence (1989) (5)
- Control of cytokinin levels by inhibitors of metabolism, symbiosis and genetic manipulation (1992) (5)
- Leaf curl syndrome of pigeonpea (Cajanus cajan (L.) Millsp.) is a systemic response to effective nodulation by the Rhizobium strain IC3342 (1991) (5)
- Derivatives of cytokinins for negative ion mass spectrometry (1998) (5)
- Toxicity of 1,2-dibromoethane and 1,3-dichloropropene to microsclerotia of Verticillium dahliae (1981) (4)
- Cytokinins of dryZea mays seed: Quantification by radioimmunoassay and gas chromatography-mass spectrometry (1988) (4)
- Axial control of cotyledon expansion and chlorophyll formation in germinating lupin seeds (1989) (3)
- A 6-oxypurine with growth promoting activity (1982) (3)
- The Synthesis of 3H-Labelled 8-Azido-N6-Benzyladenine and Related Compounds for Photoaffinity Labelling of Cytokinin-Binding Proteins (2019) (2)
- Cytokinins in maturing and germinatingLupinus luteus L. seeds (1985) (2)
- Cytokinin biosynthesis in plant tumour tissues (1985) (1)
- RNA in Retrospect (1973) (1)
- Synthesis of (2H5) indole‐3‐pyruvic acid (1983) (1)
- Methods for detecting and distinguishing between purines and pyrimidines on paper chromatograms. (1965) (0)
- Senescence in Soybean1 (0)
- Cytokinin control of sequential leaf senescence in tobacco (1990) (0)
- Quantification ofCytokinin O-Glucosides byNegative Ion MassSpectrometry (1989) (0)
- Pod development and depodding produce parallel effects on xylem sap cytokinin levels and monocarpic leaf senescence in soybean (1989) (0)
- TheBinding ofKinetin toPlantRibosomes (1970) (0)
- The Ribonucleic Acids (1973) (0)
- Phytohormones, Rhizobium Mutants, and Nodulation in (2016) (0)
- Using Yeast Hybrid System to Identify Proteins Binding to Small Molecules. (2018) (0)
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