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D-Index & Metrics

Plant Science and Agronomy

D-Index
50
Citations
8505
World Ranking
2162
National Ranking
170

David S. Letham publication distribution in Plant Science and Agronomy in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Plant Science and Agronomy in 2026. The highlighted bar marks where David S. Letham sits on this spectrum.

36–40 publications: 2 scientists 41–45 publications: 7 scientists 46–50 publications: 40 scientists 51–55 publications: 58 scientists 56–60 publications: 60 scientists 61–65 publications: 107 scientists 66–70 publications: 130 scientists 71–75 publications: 153 scientists 76–80 publications: 191 scientists 81–85 publications: 199 scientists 86–90 publications: 206 scientists 91–95 publications: 218 scientists 96–100 publications: 226 scientists 101–105 publications: 227 scientists 106–110 publications: 247 scientists 111–115 publications: 255 scientists 116–120 publications: 253 scientists 121–125 publications: 233 scientists 126–130 publications: 219 scientists 131–135 publications: 201 scientists 136–140 publications: 194 scientists 141–145 publications: 176 scientists 146–150 publications: 157 scientists 151–155 publications: 147 scientists 156–160 publications: 151 scientists 161–165 publications: 159 scientists 166–170 publications: 137 scientists 171–175 publications: 128 scientists 176–180 publications: 126 scientists 181–185 publications: 98 scientists 186–190 publications: 114 scientists 191–195 publications: 100 scientists 196–200 publications: 90 scientists 201–205 publications: 71 scientists 206–210 publications: 98 scientists 211–215 publications: 70 scientists 216–220 publications: 86 scientists 221–225 publications: 61 scientists 226–230 publications: 58 scientists 231–235 publications: 53 scientists 236–240 publications: 64 scientists 241–245 publications: 39 scientists 246–250 publications: 46 scientists 251–255 publications: 51 scientists 256–260 publications: 36 scientists 261–265 publications: 44 scientists 266–270 publications: 35 scientists 271–275 publications: 30 scientists 276–280 publications: 33 scientists 281–285 publications: 35 scientists 286–290 publications: 36 scientists 291–295 publications: 26 scientists 296–300 publications: 26 scientists 301–305 publications: 31 scientists 306–310 publications: 30 scientists 311–315 publications: 21 scientists 316–320 publications: 29 scientists 321–325 publications: 14 scientists 326–330 publications: 15 scientists 331–335 publications: 15 scientists 336–340 publications: 17 scientists 341–345 publications: 15 scientists 346–350 publications: 12 scientists 351–355 publications: 17 scientists 356–360 publications: 18 scientists 361–365 publications: 12 scientists 366–370 publications: 11 scientists 371–375 publications: 6 scientists 376–380 publications: 6 scientists 381–385 publications: 11 scientists 386–390 publications: 9 scientists 391–395 publications: 10 scientists 396–400 publications: 8 scientists 401–405 publications: 4 scientists 406–410 publications: 9 scientists 411–415 publications: 11 scientists 416–420 publications: 4 scientists 421–425 publications: 7 scientists 426–430 publications: 4 scientists 431–435 publications: 3 scientists 436–440 publications: 5 scientists 441–445 publications: 8 scientists 446–450 publications: 6 scientists 451–455 publications: 7 scientists 456–460 publications: 5 scientists 461–465 publications: 6 scientists 466 publications: 2 scientists 467+ publications: 99 scientists
36 publications 467+

This scientist: 137 publications — 51st percentile

51% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 467 publications or more.

David S. Letham D-index placement in Plant Science and Agronomy in 2026

The chart shows the D-index (discipline H-index) distribution of Plant Science and Agronomy scientists ranked by Research.com in 2026. The highlighted bar marks where David S. Letham sits on this spectrum.

30 D-Index: 200 scientists 31 D-Index: 236 scientists 32 D-Index: 253 scientists 33 D-Index: 283 scientists 34 D-Index: 288 scientists 35 D-Index: 240 scientists 36 D-Index: 246 scientists 37 D-Index: 243 scientists 38 D-Index: 247 scientists 39 D-Index: 229 scientists 40 D-Index: 232 scientists 41 D-Index: 230 scientists 42 D-Index: 228 scientists 43 D-Index: 219 scientists 44 D-Index: 193 scientists 45 D-Index: 164 scientists 46 D-Index: 158 scientists 47 D-Index: 143 scientists 48 D-Index: 131 scientists 49 D-Index: 127 scientists 50 D-Index: 122 scientists 51 D-Index: 122 scientists 52 D-Index: 110 scientists 53 D-Index: 102 scientists 54 D-Index: 98 scientists 55 D-Index: 79 scientists 56 D-Index: 85 scientists 57 D-Index: 88 scientists 58 D-Index: 91 scientists 59 D-Index: 62 scientists 60 D-Index: 61 scientists 61 D-Index: 59 scientists 62 D-Index: 54 scientists 63 D-Index: 61 scientists 64 D-Index: 59 scientists 65 D-Index: 58 scientists 66 D-Index: 41 scientists 67 D-Index: 49 scientists 68 D-Index: 39 scientists 69 D-Index: 32 scientists 70 D-Index: 40 scientists 71 D-Index: 47 scientists 72 D-Index: 38 scientists 73 D-Index: 28 scientists 74 D-Index: 29 scientists 75 D-Index: 28 scientists 76 D-Index: 22 scientists 77 D-Index: 21 scientists 78 D-Index: 25 scientists 79 D-Index: 26 scientists 80 D-Index: 19 scientists 81 D-Index: 16 scientists 82 D-Index: 12 scientists 83 D-Index: 16 scientists 84 D-Index: 14 scientists 85 D-Index: 11 scientists 86 D-Index: 17 scientists 87 D-Index: 13 scientists 88 D-Index: 10 scientists 89 D-Index: 12 scientists 90 D-Index: 18 scientists 91 D-Index: 16 scientists 92 D-Index: 16 scientists 93 D-Index: 17 scientists 94 D-Index: 12 scientists 95 D-Index: 8 scientists 96 D-Index: 9 scientists 97 D-Index: 9 scientists 98 D-Index: 11 scientists 99 D-Index: 12 scientists 100 D-Index: 5 scientists 101 D-Index: 8 scientists 102 D-Index: 4 scientists 103 D-Index: 11 scientists 104 D-Index: 5 scientists 105 D-Index: 9 scientists 106 D-Index: 7 scientists 107 D-Index: 4 scientists 108 D-Index: 8 scientists 109+ D-Index: 99 scientists
30 D-Index 109+

This scientist: 50 D-Index — 68th percentile

68% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 109 D-Index or more.

Research.com Recognitions

  • 1983 - Fellow of the Australian Academy of Science

Overview

David S. Letham is affiliated with the Australian National University in Australia. Their academic contributions are recognized through an award received in 1983 as a Fellow of the Australian Academy of Science.

The scientist's work does not have publicly listed recent papers, frequent co-authors, or common publication venues in the available data. Information regarding main fields or subfields of study, as well as specific research topics, is also not presented in the source data.

The absence of detailed bibliographic and research topic data limits a comprehensive overview of their research focus and impact but indicates a recognized standing within the scientific community as reflected by the fellowship honor.

Best Publications

  • The Biosynthesis and Metabolism of Cytokinins

    and D S Letham;L M S Palni

  • Inhibition of Cyclin‐Dependent Kinases by Purine Analogues

    Walter Filgueira De Azevedo;Sophie Leclerc;Laurent Meijer;Libor Havlicek

  • Regulators of Cell Division in Plant Tissues

    C. W. Parker;D. S. Letham

  • Cytokinin controls the cell cycle at mitosis by stimulating the tyrosine dephosphorylation and activation of p34cdc2-like H1 histone kinase

    Kerong Zhang;David S. Letham;Peter C. L. John

  • Regulators of Cell Division in Plant Tissues XII. A Cytokinin Bioassay Using Excised Radish Cotyledons

    D. S. Letham

  • Control of axillary bud initiation and shoot architecture in Arabidopsis through the SUPERSHOOT gene

    Titima Tantikanjana;Jean W.H. Yong;D. Stuart Letham;Megan Griffith

  • Correlation of xylem sap cytokinin levels with monocarpic senescence in soybean.

    L D Noodén;S Singh;D S Letham

  • Effects of Elevated [CO2] and Nitrogen Nutrition on Cytokinins in the Xylem Sap and Leaves of Cotton

    Jean W.H. Yong;S. Chin Wong;D. Stuart Letham;Charles H. Hocart

  • Detection of cytokinins in a seaweed extract

    Stephen A.B. Tay;John K. Macleod;Lok Man S. Palni;David S. Letham

  • Cytokinins from Zea mays

    David Stuart Letham

  • The effect of auxin on cytokinin levels and metabolism in transgenic tobacco tissue expressing an ipt gene

    R. Zhang;R. Zhang;X. Zhang;J. Wang;D.S. Letham

  • Cytokinin biochemistry in relation to leaf senescence. VII. Endogenous cytokinin levels and exogenous applications of cytokinins in relation to sequential leaf senescence of tobacco

    Santokh Singh;Santokh Singh;D. S. Letham;L. M. S. Palni;L. M. S. Palni

  • Regulators of cell division in plant tissues : XXV. Metabolism of zeatin by lupin seedlings.

    C. W. Parker;D. S. Letham;B. I. Gollnow;R. E. Summons

  • The binding of kinetin to plant ribosomes.

    M. V. Berridge;R. K. Ralph;D. S. Letham

  • Regulators of cell division in plant tissues. XXIX. The activities of cytokinin glucosides and alanine conjugates in cytokinin bioassays

    D. S. Letham;L. M. S. Palni;G. Q. Tao;B. I. Gollnow

  • Phytohormones, Rhizobium mutants, and nodulation in legumes. III: Auxin metabolism in effective and ineffective pea root nodules

    Jane Badenoch-Jones;Barry G. Rolfe;David S. Letham

  • Quantitation of cytokinins in biological samples using antibodies against zeatin riboside.

    Jane Badenoch-Jones;David S. Letham;Charles W. Parker;Barry G. Rolfe

  • Effect of cytokinins supplied via the xylem at multiples of endogenous concentrations on transpiration and senescence in derooted seedlings of oat and wheat

    J. Badenoch-Jones;C.W. Parker;D.S. Letham;S. Singh

  • Regulators of cell division in plant tissues : XXVIII. Metabolites of zeatin in sweet-corn kernels: Purifications and identifications using high-performance liquid chromatography and chemical-ionization mass spectrometry.

    R. E. Summons;B. Entsch;D. S. Letham;B. I. Gollnow

  • Phytohormones, Rhizobium mutants, and nodulation in legumes, IV: Auxin metabolites in pea root nodules

    Jane Badenoch-Jones;Roger E. Summons;Barry G. Rolfe;David S. Letham

  • Cytokinin Biochemistry in Relation to Leaf Senescence II. The Metabolism of 6-Benzylaminopurine in Soybean Leaves and the Inhibition of Its Conjugation

    Zhang R;Letham Ds;Wong Oc;Noodén Ld

  • Inhibitors of two enzymes which metabolize cytokinins

    Charles W. Parker;Barrie Entsch;Barrie Entsch;David S. Letham

  • Mass spectrometric quantification of indole-3-acetic Acid in Rhizobium culture supernatants: relation to root hair curling and nodule initiation.

    Jane Badenoch-Jones;R. E. Summons;M. A. Djordjevic;J. Shine

  • Regulators of cell division in plant tissues: XXIII. The identity of an unusual metabolite of 6-benzylaminopurine

    D.S. Letham;M.M. Wilson;C.W. Parker;I.D. Jenkins

  • Mass Spectrometric Analysis of Cytokinins in Plant Tissues V. Identification of the Cytokinin Complex of Datura Innoxia Crown Gall Tissue

    Lok Man S. Palni;Roger E. Summons;David S. Letham

  • Cytokinin Biochemistry in Relation to Leaf Senescence IV. Cytokinin Metabolism in Soybean Explants

    Santokh Singh;David S. Letham;Paula E. Jameson;Ren Zhang

  • 6-benzylaminopurine and its glycosides as naturally occurring cytokinins

    S.K. Nandi;D.S. Letham;L.M.S. Palni;O.C. Wong

Frequent Co-Authors

Lok Man S. Palni
Lok Man S. Palni Graphic Era University
Barry G. Rolfe
Barry G. Rolfe Australian National University
Larry D. Noodén
Larry D. Noodén University of Michigan–Ann Arbor
Thomas J. V. Higgins
Thomas J. V. Higgins Commonwealth Scientific and Industrial Research Organisation
Narayana M. Upadhyaya
Narayana M. Upadhyaya Commonwealth Scientific and Industrial Research Organisation
Peter John
Peter John King's College London
Paula E. Jameson
Paula E. Jameson University of Canterbury
Michael A. Djordjevic
Michael A. Djordjevic Australian National University
Elizabeth S. Dennis
Elizabeth S. Dennis Commonwealth Scientific and Industrial Research Organisation

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