Klaus K. Nielsen

1.6k total citations · 1 hit paper
16 papers, 1.3k citations indexed

About

Klaus K. Nielsen is a scholar working on Plant Science, Molecular Biology and Ecology, Evolution, Behavior and Systematics. According to data from OpenAlex, Klaus K. Nielsen has authored 16 papers receiving a total of 1.3k indexed citations (citations by other indexed papers that have themselves been cited), including 15 papers in Plant Science, 7 papers in Molecular Biology and 5 papers in Ecology, Evolution, Behavior and Systematics. Recurrent topics in Klaus K. Nielsen's work include Plant Molecular Biology Research (6 papers), Plant nutrient uptake and metabolism (4 papers) and Legume Nitrogen Fixing Symbiosis (3 papers). Klaus K. Nielsen is often cited by papers focused on Plant Molecular Biology Research (6 papers), Plant nutrient uptake and metabolism (4 papers) and Legume Nitrogen Fixing Symbiosis (3 papers). Klaus K. Nielsen collaborates with scholars based in Denmark, United States and France. Klaus K. Nielsen's co-authors include Jørn Dalgaard Mikkelsen, Karsten M. Kragh, Ulla Rasmussen, David B. Collinge, Knud Vad, Christian S. Jensen, Klaus Salchert, Claus H. Andersen, Thomas Didion and Klaus Petersen and has published in prestigious journals such as PLANT PHYSIOLOGY, The Plant Journal and Plant Molecular Biology.

In The Last Decade

Klaus K. Nielsen

16 papers receiving 1.2k citations

Hit Papers

align trajectories

What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

Plant chitinases

1993 741 citations David B. Collinge, Karsten M. Kragh et al. The Plant Journal profile →

Peers — A (Enhanced Table)

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

Name	h						Papers	Cites
Klaus K. Nielsen Denmark	13	1.1k	750	164	106	95	16	1.3k
Craig E. Coleman United States	20	774 0.7×	497 0.7×	127 0.8×	144 1.4×	46 0.5×	33	1.3k
Elumalai Sivamani United States	19	939 0.9×	707 0.9×	264 1.6×	30 0.3×	66 0.7×	30	1.2k
Wacław Orczyk Poland	24	1.2k 1.2×	660 0.9×	163 1.0×	22 0.2×	132 1.4×	59	1.4k
Sang Ik Song South Korea	21	2.6k 2.4×	1.7k 2.2×	154 0.9×	80 0.8×	40 0.4×	39	2.9k
R.J. Zeyen United States	26	1.7k 1.6×	483 0.6×	79 0.5×	74 0.7×	41 0.4×	54	1.8k
Jean‐Benoît Morel France	22	2.6k 2.5×	1.4k 1.8×	183 1.1×	69 0.7×	53 0.6×	27	2.9k
Steven R. Scofield United States	19	2.4k 2.3×	1.1k 1.4×	214 1.3×	52 0.5×	26 0.3×	42	2.6k
R. I. S. Brettell Australia	30	2.2k 2.0×	2.2k 2.9×	713 4.3×	138 1.3×	88 0.9×	46	2.7k
Yongqiang Gu United States	18	1.2k 1.2×	640 0.9×	31 0.2×	63 0.6×	68 0.7×	29	1.5k
James H. Oard United States	25	2.0k 1.9×	808 1.1×	237 1.4×	78 0.7×	63 0.7×	68	2.3k

Countries citing papers authored by Klaus K. Nielsen

Since Specialization

Citations

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

Fields of papers citing papers by Klaus K. Nielsen

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Klaus K. Nielsen. 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 Klaus K. Nielsen. The network helps show where Klaus K. Nielsen may publish in the future.

Co-authorship network of co-authors of Klaus K. Nielsen

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

All Works

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16 of 16 papers shown

Lenk, Ingo, Klaus Petersen, Christian S. Jensen, et al.. (2010). Nucleotide diversity and linkage disequilibrium of nine genes with putative effects on flowering time in perennial ryegrass (Lolium perenne L.). Plant Science. 180(2). 228–237. 29 indexed citations

Kichey, Thomas, Thomas P. Jahn, Christian S. Jensen, et al.. (2009). Cloning, characterization and expression analysis of tonoplast intrinsic proteins and glutamine synthetase in ryegrass (Lolium perenne L.). Plant Cell Reports. 28(10). 1549–1562. 5 indexed citations

Didion, Thomas, et al.. (2008). Improved fructan accumulation in perennial ryegrass transformed with the onion fructosyltransferase genes 1-SST and 6G-FFT. Journal of Plant Physiology. 165(11). 1214–1225. 13 indexed citations

Asp, Torben, Ursula K. Frei, Thomas Didion, Klaus K. Nielsen, & Thomas Lübberstedt. (2007). Frequency, type, and distribution of EST-SSRs from three genotypes of Lolium perenne, and their conservation across orthologous sequences of Festuca arundinacea, Brachypodium distachyon, and Oryza sativa. BMC Plant Biology. 7(1). 36–36. 56 indexed citations

Ciannamea, Stefano, Klaus Petersen, Ingo Lenk, et al.. (2006). A new member of the LIR gene family from perennial ryegrass is cold-responsive, and promotes vegetative growth in Arabidopsis. Plant Science. 172(2). 221–227. 7 indexed citations

Petersen, Klaus, Elsebeth Kolmos, Klaus Salchert, et al.. (2006). Two MADS‐box genes from perennial ryegrass are regulated by vernalization and involved in the floral transition. Physiologia Plantarum. 126(2). 268–278. 35 indexed citations

Jensen, Louise Bach, Hilde Muylle, Paul Arens, et al.. (2005). Development and mapping of a public reference set of SSR markers in Lolium perenne L.. Molecular Ecology Notes. 5(4). 951–957. 45 indexed citations

Andersen, Claus H., et al.. (2004). Photoperiodic regulation of flowering in perennial ryegrass involving a CONSTANS-like homolog. Plant Molecular Biology. 56(2). 159–169. 64 indexed citations

Petersen, Klaus, Thomas Didion, Claus H. Andersen, & Klaus K. Nielsen. (2004). MADS-box genes from perennial ryegrass differentially expressed during transition from vegetative to reproductive growth. Journal of Plant Physiology. 161(4). 439–447. 55 indexed citations

10.

Jensen, Christian S., et al.. (2004). Floral inhibition in red fescue (Festuca rubra L.) through expression of a heterologous flowering repressor from Lolium. Molecular Breeding. 13(1). 37–48. 25 indexed citations

11.

Jensen, Christian S., Klaus Salchert, & Klaus K. Nielsen. (2001). A Terminal Flower1-Like Gene from Perennial Ryegrass Involved in Floral Transition and Axillary Meristem Identity. PLANT PHYSIOLOGY. 125(3). 1517–1528. 113 indexed citations

12.

Kristensen, Anne K., Janne Brunstedt, Klaus K. Nielsen, Peter Roepstorff, & J Mikkelsen. (2000). Characterization of a new antifungal non-specific lipid transfer protein (nsLTP) from sugar beet leaves. Plant Science. 155(1). 31–40. 54 indexed citations

13.

Kristensen, Anne K., Janne Brunstedt, John Nielsen, et al.. (1999). Processing, Disulfide Pattern, and Biological Activity of a Sugar Beet Defensin, AX2, Expressed in Pichia pastoris. Protein Expression and Purification. 16(3). 377–387. 24 indexed citations

14.

Mikkelsen, Jørn Dalgaard, et al.. (1998). Immunolocalization and characterization of a β-1,3-glucanase from sugar beet, deduction of its primary structure and nucleotide sequence by cDNA and genomic cloning. Plant Science. 132(2). 153–167. 16 indexed citations

15.

Nielsen, John, Klaus K. Nielsen, & Jørn Dalgaard Mikkelsen. (1996). Immunohistological localization of a basic class IV chitinase in Beta vulgaris leaves after infection with Cercospora beticola. Plant Science. 119(1-2). 191–202. 9 indexed citations

16.

Collinge, David B., Karsten M. Kragh, Jørn Dalgaard Mikkelsen, et al.. (1993). Plant chitinases. The Plant Journal. 3(1). 31–40. 741 indexed citations breakdown →

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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