World's Best Scientists 2026 revealed!
Margaret M. Barbour

Margaret M. Barbour

D-Index & Metrics

Plant Science and Agronomy

D-Index
45
Citations
9612
World Ranking
2790
National Ranking
213

Margaret M. Barbour 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 Margaret M. Barbour 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: 108 publications — 30th percentile

30% of scientists in this discipline score the same or lower.

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

Margaret M. Barbour 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 Margaret M. Barbour 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: 45 D-Index — 57th percentile

57% 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 she best known for?

The fields of study she is best known for:

  • Ecology
  • Botany
  • Photosynthesis

Margaret M. Barbour spends much of her time researching Botany, Ecology, Photosynthesis, Stomatal conductance and Environmental chemistry. Margaret M. Barbour has researched Botany in several fields, including Cellulose and Oxygen isotope ratio cycle. Photosynthesis is frequently linked to Respiration in her study.

Her biological study spans a wide range of topics, including Agronomy, Water-use efficiency and Horticulture. Her studies deal with areas such as Carbon dioxide and Atmospheric sciences as well as Water-use efficiency. She works mostly in the field of Environmental chemistry, limiting it down to topics relating to Soil water and, in certain cases, Plant tissue.

Her most cited work include:

  • Mesophyll diffusion conductance to CO2: an unappreciated central player in photosynthesis (431 citations)
  • Stable oxygen isotope composition of plant tissue: a review (422 citations)
  • Relative humidity‐ and ABA‐induced variation in carbon and oxygen isotope ratios of cotton leaves (282 citations)

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

Her primary scientific interests are in Botany, Photosynthesis, Stomatal conductance, Transpiration and Carbon dioxide. Her work on Respiration is typically connected to Conductance as part of general Botany study, connecting several disciplines of science. The Photosynthesis study combines topics in areas such as Nothofagus, Growing season and Isotopes of carbon.

Her Isotopes of carbon research integrates issues from Environmental chemistry and δ13C. Her research in Stomatal conductance intersects with topics in Ecophysiology, Agronomy, Plant breeding, Water-use efficiency and Nocturnal. Margaret M. Barbour interconnects Cuvette, Leaf water and Atmospheric sciences in the investigation of issues within Transpiration.

She most often published in these fields:

  • Botany (61.98%)
  • Photosynthesis (37.19%)
  • Stomatal conductance (27.27%)

What were the highlights of her more recent work (between 2018-2021)?

  • Photosynthesis (37.19%)
  • Stomatal conductance (27.27%)
  • Horticulture (9.09%)

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

Her main research concerns Photosynthesis, Stomatal conductance, Horticulture, Plant breeding and Quantitative trait locus. Her study in Photosynthesis is interdisciplinary in nature, drawing from both Thermoregulation, Homeothermy, Poikilotherm and Carbon cycle. Her Stomatal conductance research is multidisciplinary, incorporating elements of Membrane permeability and Drought tolerance.

Her work on Shoot and Sunflower as part of general Horticulture study is frequently connected to Conductance and Diffusion, therefore bridging the gap between diverse disciplines of science and establishing a new relationship between them. Plant breeding is a subfield of Botany that Margaret M. Barbour tackles. Margaret M. Barbour studied Plant physiology and Transpiration that intersect with Cuvette.

Between 2018 and 2021, her most popular works were:

  • Embracing 3D Complexity in Leaf Carbon-Water Exchange. (26 citations)
  • Cell and chloroplast anatomical features are poorly estimated from 2D cross‐sections (15 citations)
  • The temperature response of mesophyll conductance, and its component conductances, varies between species and genotypes. (14 citations)

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

  • Ecology
  • Botany
  • Photosynthesis

Margaret M. Barbour mainly investigates Conductance, Horticulture, Photosynthesis, Interpretation and Composition. Conductance is integrated with Transpiration, Plant physiology, Diffusion, Chloroplast membrane and Sunflower in her study. Her Horticulture study incorporates themes from Leaf water, Membrane permeability and Stomatal conductance.

Margaret M. Barbour conducts interdisciplinary study in the fields of Photosynthesis and Temperature response through her works. Her study deals with a combination of Interpretation and Environmental chemistry.

Best Publications

  • Mesophyll diffusion conductance to CO2: an unappreciated central player in photosynthesis

    Jaume Flexas;Margaret M. Barbour;Oliver Brendel;Hernán M. Cabrera

  • Stable oxygen isotope composition of plant tissue: a review

    Margaret M. Barbour

  • Relative humidity‐ and ABA‐induced variation in carbon and oxygen isotope ratios of cotton leaves

    Margaret Barbour;Graham Farquhar

  • Why are non-photosynthetic tissues generally 13C enriched compared with leaves in C3 plants? Review and synthesis of current hypotheses.

    Lucas A. Cernusak;Guillaume Tcherkez;Claudia Keitel;William K. Cornwell

  • Sensitivity of plants to changing atmospheric CO2 concentration: From the geological past to the next century

    Peter J Franks;Mark A Adams;Jeffrey S. Amthor;Margaret M Barbour

  • Diffusional conductances to CO2 as a target for increasing photosynthesis and photosynthetic water-use efficiency.

    Jaume Flexas;Ülo Niinemets;Alexander Gallé;Alexander Gallé;Margaret M. Barbour

  • Expressing leaf water and cellulose oxygen isotope ratios as enrichment above source water reveals evidence of a Péclet effect

    Margaret M. Barbour;John S. Roden;John S. Roden;Graham D. Farquhar;James R. Ehleringer

  • Stable isotopes in leaf water of terrestrial plants.

    Lucas A. Cernusak;Margaret M. Barbour;Stefan K. Arndt;Alexander W. Cheesman

  • Seasonal variation in δ13C and δ18O of cellulose from growth rings of Pinus radiata

    M. M. Barbour;A. S. Walcroft;G. D. Farquhar

  • Oxygen isotope ratio of leaf and grain material correlates with stomatal conductance and grain yield in irrigated wheat

    Margaret Barbour;R Fischer;Ken Sayre;Graham Farquhar

  • Correlations between oxygen isotope ratios of wood constituents of Quercus and Pinus samples from around the world

    Margaret M. Barbour;T. John Andrews;Graham D. Farquhar

  • Interpretation of oxygen isotope composition of leaf material

    G.D. Farquhar;M.M. Barbour;B.K. Henry

  • Variation in the oxygen isotope ratio of phloem sap sucrose from castor bean. Evidence in support of the Péclet effect.

    Margaret Barbour;U Schurr;U Schurr;Beverley K Henry;Suan Chin Wong

  • A new measurement technique reveals rapid post‐illumination changes in the carbon isotope composition of leaf‐respired CO2

    Margaret M. Barbour;Nate G. Mcdowell;Guillaume Tcherkez;Christopher P. Bickford

  • Leaf day respiration: low CO2 flux but high significance for metabolism and carbon balance

    Guillaume Tcherkez;Paul P Gauthier;Thomas N Buckley;Florian A Busch

  • Variability in mesophyll conductance between barley genotypes, and effects on transpiration efficiency and carbon isotope discrimination.

    Margaret M. Barbour;Charles R. Warren;Graham D. Farquhar;Guy Forrester

  • Do pathways of water movement and leaf anatomical dimensions allow development of gradients in H218O between veins and the sites of evaporation within leaves

    Margaret Barbour;Graham Farquhar

  • Online CO2 and H2O oxygen isotope fractionation allows estimation of mesophyll conductance in C4 plants, and reveals that mesophyll conductance decreases as leaves age in both C4 and C3 plants

    Margaret M. Barbour;John R. Evans;Kevin A. Simonin;Susanne von Caemmerer

  • Sap flow rates and sapwood density are critical factors in within‐ and between‐tree variation in CO2 efflux from stems of mature Dacrydium cupressinum trees

    William P. Bowman;Margaret M. Barbour;Matthew H. Turnbull;David T. Tissue

  • Climate and soils together regulate photosynthetic carbon isotope discrimination within C3 plants worldwide

    Wiliam K. Cornwell;Wiliam K. Cornwell;Iain A. Wright;Joel Turner;Vincent Maire;Vincent Maire

  • Ecosystem service and biodiversity trade-offs in two woody successions

    Ian A. Dickie;Gregor W. Yeates;Mark G. St. John;Bryan A. Stevenson

  • Nocturnal stomatal conductance and implications for modelling δ18O of leaf-respired CO2 in temperate tree species.

    Margaret M. Barbour;Lucas A. Cernusak;David Whitehead;Kevin L. Griffin

Frequent Co-Authors

Graham D. Farquhar
Graham D. Farquhar Australian National University
Matthew H. Turnbull
Matthew H. Turnbull University of Canterbury
John E. Hunt
John E. Hunt Landcare Research
David Whitehead
David Whitehead Landcare Research
Guillaume Tcherkez
Guillaume Tcherkez Australian National University
David T. Tissue
David T. Tissue Western Sydney University
Kevin L. Griffin
Kevin L. Griffin Columbia University
Lucas A. Cernusak
Lucas A. Cernusak James Cook University
Lisa Wingate
Lisa Wingate INRAE : Institut national de recherche pour l'agriculture, l'alimentation et l'environnement
Thomas N. Buckley
Thomas N. Buckley University of California, Davis

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