Helmut Freitag

3.1k total citations
70 papers, 2.3k citations indexed

About

Helmut Freitag is a scholar working on Plant Science, Ecology, Evolution, Behavior and Systematics and Molecular Biology. According to data from OpenAlex, Helmut Freitag has authored 70 papers receiving a total of 2.3k indexed citations (citations by other indexed papers that have themselves been cited), including 52 papers in Plant Science, 45 papers in Ecology, Evolution, Behavior and Systematics and 15 papers in Molecular Biology. Recurrent topics in Helmut Freitag's work include Mediterranean and Iberian flora and fauna (41 papers), Plant Diversity and Evolution (24 papers) and Botany and Plant Ecology Studies (18 papers). Helmut Freitag is often cited by papers focused on Mediterranean and Iberian flora and fauna (41 papers), Plant Diversity and Evolution (24 papers) and Botany and Plant Ecology Studies (18 papers). Helmut Freitag collaborates with scholars based in Germany, Russia and United States. Helmut Freitag's co-authors include Gudrun Kadereit, Kurt Weising, Walter Neupert, Roland Benz, Thomas Borsch, Gerald E. Edwards, Elena V. Voznesenskaya, Vincent R. Franceschi, Olavi Kiirats and W. Stichler and has published in prestigious journals such as Nature, Journal of Biological Chemistry and Circulation.

In The Last Decade

Helmut Freitag

68 papers receiving 2.2k citations

Peers

Countries citing papers authored by Helmut Freitag

Since Specialization

Citations

This map shows the geographic impact of Helmut Freitag'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 Helmut Freitag with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Helmut Freitag more than expected).

Fields of papers citing papers by Helmut Freitag

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Helmut Freitag. 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 Helmut Freitag. The network helps show where Helmut Freitag may publish in the future.

Co-authorship network of co-authors of Helmut Freitag

This figure shows the co-authorship network connecting the top 25 collaborators of Helmut Freitag. A scholar is included among the top collaborators of Helmut Freitag 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 Helmut Freitag. Helmut Freitag is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

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20 of 20 papers shown

#	Work	Indexed citations
1	(3000) Proposal to conserve the name Soda against Sevada (Chenopodiaceae s.str. / Amaranthaceae s.l.) 2023 ·Taxon ·Sergei L. Mosyakin, Helmut Freitag	1
2	The holotype of Chenopodium baryosmon (Chenopodiaceae) rediscovered: just one of many type specimens from the private herbarium of Schultes, now in the Turczaninow herbarium at KW 2018 ·Phytotaxa ·Sergei L. Mosyakin, Hans‐Joachim Esser, Helmut Freitag	3
3	Salicornia cuscoensis (Amaranthaceae/Chenopodiaceae), a new species from Peru (South America) 2017 ·Phytotaxa ·M. Ángeles Alonso-Vargas, Manuel B. Crespo, Helmut Freitag	3
4	Nomenclature of Caroxylon imbricatum s.lat. (Amaranthaceae / Chenopodiaceae), with a new combination at variety rank 2017 ·Phytotaxa ·(unknown), Duilio Iamonico, Helmut Freitag	2
5	Restoration of Suaeda sect. Helicilla (Chenopodiaceae) and typification of its related taxa 2017 ·Phytotaxa ·Helmut Freitag, (unknown)	2
6	Molecular phylogeny and forms of photosynthesis in tribe Salsoleae (Chenopodiaceae) 2016 ·Journal of Experimental Botany ·(unknown), Helmut Freitag, Nuria K. Koteyeva, (unknown), Gerald E. Edwards, Elena V. Voznesenskaya, Gudrun Kadereit	32
7	Lectotypification of the name Polycnemum majus (Amaranthaceae s.str.) 2015 ·Phytotaxa ·Helmut Freitag, Duilio Iamonico	6
8	The Lybian collections in FI (Herbarium Centrale Italicum and Webb Herbarium) and studies on the Lybian flora by R. Pampanini – Part 1 2015 ·CINECA IRIS Institutial research information system (University of Pisa) ·(unknown), Chiara Nepi, (unknown), Lorenzo Cecchi, Helmut Freitag, (unknown), M Stolte, (unknown), Lorenzo Peruzzi, (unknown), Adriano Stinca, Bruno Wallnöfer, (unknown)	2
9	When do different C4 leaf anatomies indicate independent C4 origins? Parallel evolution of C4 leaf types in Camphorosmeae (Chenopodiaceae) 2014 ·Journal of Experimental Botany ·Gudrun Kadereit, (unknown), Michael D. Pirie, (unknown), Helmut Freitag	23
10	The nomenclatural history of Salsola sedoides L. and Salsola sedoides Pall. (Suaedoideae and Camphorosmoideae, Chenopodiaceae/Amaranthaceae) 2014 ·Taxon ·Alexander N. Sennikov, Helmut Freitag	3
11	Suaeda iranshahrii, a new species of Suaeda subgenus Brezia (Chenopodiaceae) from the Persian Gulf coasts 2013 ·SHILAP Revista de lepidopterología ·Helmut Freitag, Ronny Brandt, (unknown), Hossein Akhani	4
12	The genus Halothamnus Jaub. & spach (Chenopodiaceae) in Turkey 2009 ·TURKISH JOURNAL OF BOTANY ·Helmut Freitag, (unknown), (unknown), Mustafa Aslan	4
13	Structural, Biochemical, and Physiological Characterization of C₄ Photosynthesis in Species Having Two Vastly Different Types of Kranz Anatomy in Genus Suaeda (Chenopodiaceae) 2007 ·Plant Biology ·Elena V. Voznesenskaya, Simon D. X. Chuong, Nuria K. Koteyeva, Vincent R. Franceschi, Helmut Freitag, Gerald E. Edwards	17
14	Excision of the Coronary Orifices in Arterial Switch Operation: “O” Like Obstructive and “U” Like Unobstructive? 2004 ·The Thoracic and Cardiovascular Surgeon ·W Beierlein, Helmut Freitag, (unknown), Renate Kaulitz, (unknown), I. Luhmer, Michael Hofbeck, Gerhard Ziemer	3
15	Phylogeny of Amaranthaceae and Chenopodiaceae and the Evolution of C₄Photosynthesis 2003 ·International Journal of Plant Sciences ·Gudrun Kadereit, Thomas Borsch, Kurt Weising, Helmut Freitag	321
16	Proof of C₄ photosynthesis without Kranz anatomy in Bienertia cycloptera (Chenopodiaceae) 2002 ·The Plant Journal ·Elena V. Voznesenskaya, Vincent R. Franceschi, Olavi Kiirats, (unknown), Helmut Freitag, Gerald E. Edwards	136
17	Kranz anatomy is not essential for terrestrial C4 plant photosynthesis 2001 ·Nature ·Elena V. Voznesenskaya, Vincent R. Franceschi, Olavi Kiirats, Helmut Freitag, Gerald E. Edwards	221
18	CARBOHYDRATE-DEFICIENT TRANSFERRIN AS A SCREENING MARKER FOR DRINKING IN A GENERAL HOSPITAL POPULATION 1996 ·Alcohol and Alcoholism ·(unknown), (unknown), Helmut Freitag, (unknown), (unknown), (unknown), Alexander Neumeister, (unknown), H. Pusch, Brigitte Semler, Erling Sundrehagen, Siegfried Kasper	28
19	A water-soluble form of porin from the mitochondrial outer membrane of Neurospora crassa 1985 ·Journal of Biological Chemistry ·Rupert Pfaller, Helmut Freitag, Matthew A. Harmey, Roland Benz, Walter Neupert	16
20	Ethylmercurithiosalicylate — a new reagent for the study of phosphate transport in mitochondria 1980 ·FEBS Letters ·Helmut Freitag, Bernhard Kadenbach	2

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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