J.B. Speakman

704 total citations
26 papers, 577 citations indexed

About

J.B. Speakman is a scholar working on Plant Science, Cell Biology and Ecology, Evolution, Behavior and Systematics. According to data from OpenAlex, J.B. Speakman has authored 26 papers receiving a total of 577 indexed citations (citations by other indexed papers that have themselves been cited), including 20 papers in Plant Science, 13 papers in Cell Biology and 9 papers in Ecology, Evolution, Behavior and Systematics. Recurrent topics in J.B. Speakman's work include Plant Pathogens and Fungal Diseases (13 papers), Plant Physiology and Cultivation Studies (6 papers) and Plant Disease Resistance and Genetics (5 papers). J.B. Speakman is often cited by papers focused on Plant Pathogens and Fungal Diseases (13 papers), Plant Physiology and Cultivation Studies (6 papers) and Plant Disease Resistance and Genetics (5 papers). J.B. Speakman collaborates with scholars based in Germany, United Kingdom and United States. J.B. Speakman's co-authors include G. Stammler, Josef Zapp, Hans Becker, Jochen M. Scher, B.G. Lewis, W. Rademacher, Wolfgang Krüger, Karl Stich, Heidi Halbwirth and D. Treutter and has published in prestigious journals such as New Phytologist, Phytochemistry and Crop Protection.

In The Last Decade

J.B. Speakman

25 papers receiving 524 citations

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name h Career Trend Papers Cites
J.B. Speakman Germany 12 434 177 171 146 67 26 577
M. E. Mace United States 14 740 1.7× 115 0.6× 228 1.3× 311 2.1× 113 1.7× 28 918
Kirstin Wurms New Zealand 14 479 1.1× 74 0.4× 168 1.0× 197 1.3× 70 1.0× 40 735
R. Torres Chile 11 239 0.6× 57 0.3× 101 0.6× 86 0.6× 68 1.0× 19 334
Edgar E. Stinson United States 12 285 0.7× 119 0.7× 86 0.5× 81 0.6× 138 2.1× 15 486
U. Afek Israel 16 416 1.0× 37 0.2× 169 1.0× 113 0.8× 105 1.6× 31 535
S. L. Lupien United States 13 338 0.8× 59 0.3× 227 1.3× 186 1.3× 71 1.1× 26 582
J. S. Srivastava India 12 307 0.7× 42 0.2× 92 0.5× 71 0.5× 67 1.0× 34 428
I. A. M. Cruickshank Australia 14 529 1.2× 72 0.4× 159 0.9× 288 2.0× 65 1.0× 28 726
Gary A Lombaert Canada 15 552 1.3× 83 0.5× 131 0.8× 50 0.3× 159 2.4× 19 647
M. Steyn South Africa 13 475 1.1× 47 0.3× 115 0.7× 71 0.5× 116 1.7× 27 561

Countries citing papers authored by J.B. Speakman

Since Specialization
Citations

This map shows the geographic impact of J.B. Speakman's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by J.B. Speakman with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites J.B. Speakman more than expected).

Fields of papers citing papers by J.B. Speakman

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by J.B. Speakman. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by J.B. Speakman. The network helps show where J.B. Speakman may publish in the future.

Co-authorship network of co-authors of J.B. Speakman

This figure shows the co-authorship network connecting the top 25 collaborators of J.B. Speakman. A scholar is included among the top collaborators of J.B. Speakman based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with J.B. Speakman. J.B. Speakman is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

20 of 20 papers shown
1.
2.
Speakman, J.B., Denise C. Manker, S. Schlehuber, et al.. (2011). Biological activity and mode of action of Serenade. 339–345. 1 indexed citations
3.
Gold, Roger E., J.B. Speakman, G. Stammler, et al.. (2011). Initium® - a new innovative fungicide for the control of oomycetes in speciality crop.. 55–62. 1 indexed citations
4.
Spinelli, Francesco, G. Costa, J.B. Speakman, et al.. (2006). PROHEXADIONE-CALCIUM INDUCES IN APPLE THE BIOSYNTHESIS OF LUTEOFOROL, A NOVEL FLAVAN 4-OL, WHICH IS ACTIVE AGAINST ERWINIA AMYLOVORA. Acta Horticulturae. 239–244. 2 indexed citations
5.
Becker, Hans, Jochen M. Scher, J.B. Speakman, & Josef Zapp. (2005). Bioactivity guided isolation of antimicrobial compounds from Lythrum salicaria. Fitoterapia. 76(6). 580–584. 73 indexed citations
6.
Spinelli, Francesco, J.B. Speakman, W. Rademacher, et al.. (2005). Luteoforol, a flavan 4-ol, is induced in pome fruits by prohexadione-calciumand shows phytoalexin-like properties against Erwinia amylovoraand other plant pathogens. European Journal of Plant Pathology. 112(2). 133–142. 53 indexed citations
7.
Scher, Jochen M., J.B. Speakman, Josef Zapp, & Hans Becker. (2004). Bioactivity guided isolation of antifungal compounds from the liverwort Bazzania trilobata (L.) S.F. Gray. Phytochemistry. 65(18). 2583–2588. 82 indexed citations
8.
Fischer, Thilo C., Heidi Halbwirth, Silke Peterek, et al.. (2003). Effect of dioxygenase inhibitors on the resistance-related flavonoid metabolism of apple and pears: chemical, biochemical and molecular biological aspects. European Journal of Horticultural Science. 129–136. 14 indexed citations
9.
Halbwirth, Heidi, Thilo C. Fischer, Francesco Spinelli, et al.. (2003). Induction of Antimicrobial 3-Deoxyflavonoids in Pome Fruit Trees Controls Fire Blight. Zeitschrift für Naturforschung C. 58(11-12). 765–770. 38 indexed citations
10.
Rademacher, W., et al.. (1999). 523 Prohexadione-Ca: Induction of Resistance against Bacterial and Fungal Pathogens in Apple. HortScience. 34(3). 535F–536. 1 indexed citations
11.
Treutter, D., et al.. (1999). EFFECTS OF PROHEXADIONE-CA ON THE FLAVONOID METABOLISM OF APPLE WITH RESPECT TO PLANT RESISTANCE AGAINST FIRE BLIGHT. Acta Horticulturae. 359–364. 32 indexed citations
12.
Rademacher, W., J.B. Speakman, Richard R. Evans, et al.. (1998). Prohexadione-Ca—A New Plant Growth Regulator for Apple with Interesting Biochemical Features. HortScience. 33(3). 540d–540. 9 indexed citations
13.
Speakman, J.B.. (1984). Perithecia of Gaeumannomyces graminis var. graminis and G. graminis var. tritici in pure culture. Transactions of the British Mycological Society. 82(4). 720–723. 1 indexed citations
14.
Speakman, J.B. & Wolfgang Krüger. (1983). A comparison of methods to surface sterilize wheat seeds. Transactions of the British Mycological Society. 80(2). 374–376. 30 indexed citations
15.
Speakman, J.B.. (1982). A simple, reliable method of producing perithecia of Gaeumannomyces gramnis var. tritici and its application to isolates of Phialophora spp.. Transactions of the British Mycological Society. 79(2). 350–353. 9 indexed citations
16.
Speakman, J.B., et al.. (1981). Mutagenicity of methyl benzimidazol-2-yl carbamate (MBC) towards Aspergillus nidulans (Eidam) Winter and Cladosporium cucumerinum Ellis & Arth.. Mutation Research/Genetic Toxicology. 88(1). 45–51. 10 indexed citations
17.
Nirenberg, Helgard I. & J.B. Speakman. (1981). The pH dependence of the mutagenicity of methyl benzimidazol-2-yl carbamate (MBC) towards Aspergillus nidulans (Eidam) Winter and Cladosporium cucumerinum Ellis & Arth.. Mutation Research/Genetic Toxicology. 88(1). 53–59. 7 indexed citations
18.
Speakman, J.B. & B.G. Lewis. (1980). Vitamin requirements of Phialophora radicicola var. graminicola compared with Gaeumannomyces graminis var. tritici. Transactions of the British Mycological Society. 74(2). 410–413. 4 indexed citations
19.
Speakman, J.B., et al.. (1978). Responses of grass and maize roots to invasion by Gaeumannomyces graminis and Phialophora radicicola. Transactions of the British Mycological Society. 70(3). 325–328. 4 indexed citations
20.
Speakman, J.B., et al.. (1978). Control of Take‐all Disease of Wheat by Grasses and Legumes. Plant Pathology. 27(2). 58–65. 4 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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