World's Best Scientists 2026 revealed!

D-Index & Metrics

Plant Science and Agronomy

D-Index
59
Citations
11074
World Ranking
1287
National Ranking
338

Donald A. Phillips 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 Donald A. Phillips 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: 148 publications — 57th percentile

57% of scientists in this discipline score the same or lower.

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

Donald A. Phillips 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 Donald A. Phillips 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: 59 D-Index — 81st percentile

81% of scientists in this discipline score the same or lower.

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

Overview

What is he best known for?

The fields of study he is best known for:

  • Botany
  • Bacteria
  • Gene

Donald A. Phillips mostly deals with Botany, Rhizobium, Biochemistry, Rhizosphere and Root nodule. His research on Botany focuses in particular on Germination. His Rhizobium research includes elements of Luteolin, Exudate, Nod and Rhizobiaceae.

His Rhizobiaceae research includes themes of Organic acid, Medicago sativa, Nutrient and Plant physiology. His Biochemistry research incorporates elements of Hydrogenase, Anthocyanidin, Nitrogenase and Rhizobium leguminosarum. The various areas that Donald A. Phillips examines in his Root nodule study include Ontogeny, Compensation point and Agronomy.

His most cited work include:

  • Root exudates as mediators of mineral acquisition in low-nutrient environments (908 citations)
  • Diverse functions of isoflavonoids in legumes transcend anti-microbial definitions of phytoalexins (226 citations)
  • Microbial Products Trigger Amino Acid Exudation from Plant Roots (204 citations)

What are the main themes of his work throughout his whole career to date?

The scientist’s investigation covers issues in Botany, Rhizobium, Root nodule, Agronomy and Nitrogen fixation. His work carried out in the field of Botany brings together such families of science as Biochemistry, Rhizosphere, Bacteria and Rhizobiaceae, Rhizobium leguminosarum. Donald A. Phillips has researched Rhizobium in several fields, including Nod, Rhizobia, Symbiosis, Luteolin and Medicago sativa.

His study in Root nodule is interdisciplinary in nature, drawing from both Shoot, Horticulture, Plant physiology, Respiration and Nitrogenase. His Agronomy study incorporates themes from N2 Fixation and Animal science. His work investigates the relationship between Nitrogen fixation and topics such as Photosynthesis that intersect with problems in Dry weight.

He most often published in these fields:

  • Botany (52.34%)
  • Rhizobium (40.19%)
  • Root nodule (29.91%)

What were the highlights of his more recent work (between 1995-2015)?

  • Botany (52.34%)
  • Rhizosphere (19.63%)
  • Biochemistry (20.56%)

In recent papers he was focusing on the following fields of study:

Donald A. Phillips mainly focuses on Botany, Rhizosphere, Biochemistry, Bacteria and Rhizobium. His Botany research is multidisciplinary, incorporating perspectives in Yield and Root nodule. The Root nodule study combines topics in areas such as Rhizobiaceae and Respiration.

Donald A. Phillips interconnects Ecology, Soil water, Nutrient, Microorganism and Shoot in the investigation of issues within Rhizosphere. Donald A. Phillips combines subjects such as Pesticide and Microbiology with his study of Bacteria. In his work, Root hair is strongly intertwined with Symbiosis, which is a subfield of Rhizobium.

Between 1995 and 2015, his most popular works were:

  • Root exudates as mediators of mineral acquisition in low-nutrient environments (908 citations)
  • Diverse functions of isoflavonoids in legumes transcend anti-microbial definitions of phytoalexins (226 citations)
  • Microbial Products Trigger Amino Acid Exudation from Plant Roots (204 citations)

In his most recent research, the most cited papers focused on:

  • Botany
  • Bacteria
  • Gene

Donald A. Phillips focuses on Botany, Biochemistry, Rhizosphere, Efflux and Isoflavonoid. Many of his research projects under Botany are closely connected to Inorganic ions with Inorganic ions, tying the diverse disciplines of science together. His research in the fields of Electrophoretic mobility shift assay overlaps with other disciplines such as Trans-Activators, Homoserine and Flavin group.

His biological study spans a wide range of topics, including Soil water, Plant physiology, Root nodule, Rhizobiaceae and Shoot. His Efflux research is multidisciplinary, incorporating perspectives in Amino acid, Medicago truncatula, Soil food web and Poaceae. His Isoflavonoid research includes elements of Genetics, Symbiosis, Antimicrobial and Rhizobium.

Best Publications

  • Root exudates as mediators of mineral acquisition in low-nutrient environments

    Felix D. Dakora;Donald A. Phillips

  • Diverse functions of isoflavonoids in legumes transcend anti-microbial definitions of phytoalexins

    F.D. Dakora;D.A. Phillips

  • Microbial products trigger amino acid exudation from plant roots.

    Donald A. Phillips;Tama C. Fox;Maria D. King;T.V. Bhuvaneswari

  • Flavonoids released naturally from alfalfa promote development of symbiotic glomus spores in vitro.

    Siu M. Tsai;Donald A. Phillips

  • A Chalcone and Two Related Flavonoids Released from Alfalfa Roots Induce nod Genes of Rhizobium meliloti

    Carl A. Maxwell;Ueli A. Hartwig;Cecillia M. Joseph;Donald A. Phillips

  • Flavonoids Released Naturally from Alfalfa Seeds Enhance Growth Rate of Rhizobium meliloti

    Ueli A. Hartwig;Cecillia M. Joseph;Donald A. Phillips

  • Efficiency of Symbiotic Nitrogen Fixation in Legumes

    Unknown

  • Trigonelline and Stachydrine Released from Alfalfa Seeds Activate NodD2 Protein in Rhizobium meliloti.

    Donald A. Phillips;Cecillia M. Joseph;Carl A. Maxwell

  • Chrysoeriol and Luteolin Released From Alfalfa Seeds Induce Nod Genes in Rhizobium Meliloti

    Ueli A. Hartwig;Carl A. Maxwell;Cecillia M. Joseph;Donald A. Phillips

  • The Vitamin Riboflavin and Its Derivative Lumichrome Activate the LasR Bacterial Quorum-Sensing Receptor

    Sathish Rajamani;Wolfgang D. Bauer;Jayne B. Robinson;John M. Farrow

  • Studies on cytokinin production by Rhizobium.

    Donald A. Phillips;John G. Torrey

  • Identification of lumichrome as a sinorhizobium enhancer of alfalfa root respiration and shoot growth

    Donald A. Phillips;Cecillia M. Joseph;Guo-Ping Yang;Esperanza Martínez-Romero

  • Alfalfa (Medicago sativa L.) Root Exudates Contain Isoflavonoids in the Presence of Rhizobium meliloti.

    Felix D. Dakora;Cecillia M. Joseph;Donald A. Phillips

  • Biotin and other water-soluble vitamins are key growth factors for alfalfa root colonization by Rhizobium meliloti 1021

    W R Streit;C M Joseph;D A Phillips

  • Ontogenetic Interactions between Photosynthesis and Symbiotic Nitrogen Fixation in Legumes

    Gabor J. Bethlenfalvay;Donald A. Phillips

  • Flavonoids Promote Haustoria Formation in the Root Parasite Triphysaria versicolor

    Huguette Albrecht;John I. Yoder;Donald A. Phillips

  • Flavone Limitations to Root Nodulation and Symbiotic Nitrogen Fixation in Alfalfa

    Yoram Kapulnik;Cecillia M. Joseph;Donald A. Phillips

  • Root exudation (net efflux of amino acids) may increase rhizodeposition under elevated CO2

    Donald A. Phillips;Tama C. Fox;Johan Six

  • Anthocyanidins and Flavonols, Major nod Gene Inducers from Seeds of a Black-Seeded Common Bean (Phaseolus vulgaris L.).

    Mariangela Hungria;Cecillia M. Joseph;Donald A. Phillips

  • An Isoflavonoid-Inducible Efflux Pump in Agrobacterium tumefaciens Is Involved in Competitive Colonization of Roots

    Jeffrey D. Palumbo;Clarence I. Kado;Donald A. Phillips

  • Co-transfer of determinants for hydrogenase activity and nodulation ability in Rhizobium leguminosarum

    N. J. Brewin;T. M. DeJong;D. A. Phillips;A. W. B. Johnston

  • Nitrogen Fixation and Delayed Leaf Senescence in Soybeans

    Salah S. Abu-Shakra;Donald A. Phillips;Ray C. Huffaker

  • Release and Modification of nod-Gene-Inducing Flavonoids from Alfalfa Seeds

    Ueli A. Hartwig;Donald A. Phillips

  • MOLECULAR CONTROL POINTS IN RHIZOSPHERE FOOD WEBS

    Donald A. Phillips;Howard Ferris;Douglas R. Cook;Donald R. Strong

  • Induction of Root Nodule Senescence by Combined Nitrogen in Pisum sativum L.

    Pin-Ching Chen;Donald A. Phillips

  • Concurrent Synthesis and Release of nod-Gene-Inducing Flavonoids from Alfalfa Roots

    Carl A. Maxwell;Donald A. Phillips

  • Effect of Light Intensity on Efficiency of Carbon Dioxide and Nitrogen Reduction in Pisum sativum L.

    Gabor J. Bethlenfalvay;Donald A. Phillips

  • Effects of alfalfa nod gene-inducing flavonoids on nodABC transcription in Rhizobium meliloti strains containing different nodD genes.

    U A Hartwig;C A Maxwell;C M Joseph;D A Phillips

  • Interdependence of Nitrogen Nutrition and Photosynthesis in Pisum sativum L: II. Host Plant Response to Nitrogen Fixation by Rhizobium Strains.

    Gabor J. Bethlenfalvay;Salah S. Abu-Shakra;Donald A. Phillips

Frequent Co-Authors

Wolfgang R. Streit
Wolfgang R. Streit Universität Hamburg
Felix D. Dakora
Felix D. Dakora Tshwane University of Technology
Yoram Kapulnik
Yoram Kapulnik BARD The U.S.-Israel Binational Agricultural Research and Development Fund
Larry E. Williams
Larry E. Williams University of California, Davis
Theodore M. DeJong
Theodore M. DeJong University of California, Davis
Nicholas J. Brewin
Nicholas J. Brewin John Innes Centre
Mariangela Hungria
Mariangela Hungria Brazilian Agricultural Research Corporation
Jacques Wery
Jacques Wery Institut Agro, France
Yaacov Okon
Yaacov Okon Hebrew University of Jerusalem
Donald R. Strong
Donald R. Strong University of California, Davis

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