World's Best Scientists 2026 revealed!

D-Index & Metrics

Microbiology

D-Index
88
Citations
25960
World Ranking
766
National Ranking
357

Plant Science and Agronomy

D-Index
87
Citations
25727
World Ranking
319
National Ranking
112

Alan Collmer 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 Alan Collmer 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: 186 publications — 73rd percentile

73% of scientists in this discipline score the same or lower.

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

Alan Collmer 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 Alan Collmer 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: 87 D-Index — 95th percentile

95% 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

  • 2000 - Fellow of the American Academy of Microbiology Genetics and Molecular Biology
  • 1996 - Fellow of the American Phytopathological Society

Overview

Alan Collmer is affiliated with Cornell University in the United States and focuses their research primarily in Agricultural and Biological Sciences. Their work spans several subfields, including Plant Science and Cell Biology.

The scientist's research interests concentrate on topics such as:

  • Plant Pathogenic Bacteria Studies
  • Plant-Microbe Interactions and Immunity
  • Legume Nitrogen Fixing Symbiosis
  • Plant Pathogens and Fungal Diseases

Alan Collmer has published in several scientific journals, with frequent publications appearing in:

  • Phytopathology
  • Molecular Plant-Microbe Interactions

Among their recent works are:

  • "Discovery of the Hrp Type III Secretion System in Phytopathogenic Bacteria: How Investigation of Hypersensitive Cell Death in Plants Led to a Novel Protein Injector System and a World of Inter-Organismal Molecular Interactions Within Plant Cells," 2023, Phytopathology
  • "James Robert Alfano, A Giant in Phytopathogenic Bacteria Effector Biology," 2020, Molecular Plant-Microbe Interactions

Alan Collmer has collaborated frequently with Brian H. Kvitko.

Their awards include being named a Fellow of the American Academy of Microbiology in 2000 for contributions to Genetics and Molecular Biology, and a Fellow of the American Phytopathological Society in 1996.

Best Publications

  • Type III Secretion Machines: Bacterial Devices for Protein Delivery into Host Cells

    Jorge E. Galán;Alan Collmer

  • Harpin, elicitor of the hypersensitive response produced by the plant pathogen Erwinia amylovora

    Zhong-Min Wei;Ron J. Laby;Cathy H. Zumoff;David W. Bauer

  • TYPE III SECRETION SYSTEM EFFECTOR PROTEINS: Double Agents in Bacterial Disease and Plant Defense

    James R. Alfano;Alan Collmer

  • The complete genome sequence of the Arabidopsis and tomato pathogen Pseudomonas syringae pv. tomato DC3000

    C. Robin Buell;Vinita Joardar;Magdalen Lindeberg;Jeremy Selengut

  • The type III (Hrp) secretion pathway of plant pathogenic bacteria: trafficking harpins, Avr proteins, and death.

    James R. Alfano;Alan Collmer

  • Pseudomonas syringae pv. syringae harpinPss: A protein that is secreted via the hrp pathway and elicits the hypersensitive response in plants

    Sheng Yang He;Hsiou-Chen Huang;Alan Collmer

  • The Pseudomonas syringae Hrp pathogenicity island has a tripartite mosaic structure composed of a cluster of type III secretion genes bounded by exchangeable effector and conserved effector loci that contribute to parasitic fitness and pathogenicity in plants

    James R. Alfano;Amy O. Charkowski;Amy O. Charkowski;Wen Ling Deng;Jorge L. Badel

  • An nptI-sacB-sacR cartridge for constructing directed, unmarked mutations in Gram-negative bacteria by marker exchange-eviction mutagenesis

    Jeffrey L. Ried;Alan Collmer

  • Bacterial Pathogens in Plants: Life up against the Wall.

    James R. Alfano;Alan Collmer

  • Assay methods for pectic enzymes

    Alan Collmer;Jeffrey L. Ried;Mark S. Mount

  • Whole-Genome Sequence Analysis of Pseudomonas syringae pv. phaseolicola 1448A Reveals Divergence among Pathovars in Genes Involved in Virulence and Transposition

    Vinita Joardar;Magdalen Lindeberg;Robert W. Jackson;Jeremy Selengut

  • Genomewide identification of Pseudomonas syringae pv. tomato DC3000 promoters controlled by the HrpL alternative sigma factor.

    Derrick E. Fouts;Robert B. Abramovitch;James R. Alfano;Angela M. Baldo

  • Genomewide identification of proteins secreted by the Hrp type III protein secretion system of Pseudomonas syringae pv. tomato DC3000.

    Tanja Petnicki-Ocwieja;David J. Schneider;Vincent C. Tam;Scott T. Chancey

  • Expression of the Pseudomonas syringae avirulence protein AvrB in plant cells alleviates its dependence on the hypersensitive response and pathogenicity (Hrp) secretion system in eliciting genotype-specific hypersensitive cell death.

    Suresh Gopalan;David W. Bauer;James R. Alfano;Amy O. Loniello

  • Identification of Pseudomonas syringae type III effectors that can suppress programmed cell death in plants and yeast

    Yashitola Jamir;Ming Guo;Hye Sook Oh;Tanja Petnicki-Ocwieja

  • Pseudomonas syringae type III secretion system effectors: repertoires in search of functions

    Sébastien Cunnac;Magdalen Lindeberg;Alan Collmer

  • A Pseudomonas syringae pv. tomato DC3000 mutant lacking the type III effector HopQ1‐1 is able to cause disease in the model plant Nicotiana benthamiana

    Chia Fong Wei;Brian H. Kvitko;Rena Shimizu;Emerson Crabill

  • Deletions in the repertoire of Pseudomonas syringae pv. tomato DC3000 type III secretion effector genes reveal functional overlap among effectors.

    Brian H. Kvitko;Duck Hwan Park;André C. Velásquez;Chia-Fong Wei

  • Unified nomenclature for broadly conserved hrp genes of phytopathogenic bacteria

    A. J. Bogdanove;S. V. Beer;U. Bonas;C. A. Boucher

  • Pseudomonas syringae Hrp type III secretion system and effector proteins.

    Alan Collmer;Jorge L. Badel;Amy O. Charkowski;Wen-Ling Deng

Frequent Co-Authors

James R. Alfano
James R. Alfano University of Nebraska–Lincoln
Gregory B. Martin
Gregory B. Martin Boyce Thompson Institute
Sheng Yang He
Sheng Yang He Howard Hughes Medical Institute
Steven V. Beer
Steven V. Beer Cornell University
Amy O. Charkowski
Amy O. Charkowski Colorado State University
Gail M. Preston
Gail M. Preston University of Oxford
Pablo Rodríguez-Palenzuela
Pablo Rodríguez-Palenzuela Technical University of Madrid
Derrick E. Fouts
Derrick E. Fouts J. Craig Venter Institute
C. Robin Buell
C. Robin Buell University of Georgia
Adam J. Bogdanove
Adam J. Bogdanove Cornell University

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