Marjo Helander

7.9k total citations · 1 hit paper
139 papers, 5.9k citations indexed

About

Marjo Helander is a scholar working on Ecology, Evolution, Behavior and Systematics, Plant Science and Cell Biology. According to data from OpenAlex, Marjo Helander has authored 139 papers receiving a total of 5.9k indexed citations (citations by other indexed papers that have themselves been cited), including 106 papers in Ecology, Evolution, Behavior and Systematics, 69 papers in Plant Science and 46 papers in Cell Biology. Recurrent topics in Marjo Helander's work include Plant and fungal interactions (89 papers), Plant Pathogens and Fungal Diseases (46 papers) and Weed Control and Herbicide Applications (26 papers). Marjo Helander is often cited by papers focused on Plant and fungal interactions (89 papers), Plant Pathogens and Fungal Diseases (46 papers) and Weed Control and Herbicide Applications (26 papers). Marjo Helander collaborates with scholars based in Finland, Spain and Argentina. Marjo Helander's co-authors include Kari Saikkonen, Stanley H. Faeth, Terrence Sullivan, Irma Saloniemi, Pedro E. Gundel, Piippa R. Wäli, Jouni U. Ahlholm, Cyd E. Hamilton, Päivi Lehtonen and S. Saari and has published in prestigious journals such as SHILAP Revista de lepidopterología, Environmental Science & Technology and PLoS ONE.

In The Last Decade

Marjo Helander

137 papers receiving 5.7k 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.

FUNGAL ENDOPHYTES: A Continuum of Interactions with Host Plants

1998 805 citations Kari Saikkonen, Stanley H. Faeth et al. profile →

Peers — A (Enhanced Table)

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

Name	h						Papers	Cites
Marjo Helander Finland	43	3.5k	3.3k	2.0k	1.3k	643	139	5.9k
Kari Saikkonen Finland	43	3.8k 1.1×	3.7k 1.1×	2.1k 1.1×	1.4k 1.1×	660 1.0×	147	6.5k
Bryce Kendrick Canada	30	940 0.3×	2.6k 0.8×	1.5k 0.7×	708 0.6×	111 0.2×	92	4.1k
James D. Lawrey United States	30	2.5k 0.7×	2.2k 0.7×	1000 0.5×	306 0.2×	139 0.2×	97	3.3k
Philippe Vandenkoornhuyse France	33	1.2k 0.3×	5.1k 1.5×	1.3k 0.6×	1.4k 1.1×	356 0.6×	75	7.1k
Jolanta Miądlikowska United States	34	2.6k 0.8×	3.0k 0.9×	2.0k 1.0×	525 0.4×	43 0.1×	83	3.8k
J. Dodd United Kingdom	32	346 0.1×	2.5k 0.8×	750 0.4×	277 0.2×	232 0.4×	107	2.9k
Marc Buée France	31	854 0.2×	3.5k 1.1×	1.0k 0.5×	813 0.6×	158 0.2×	73	4.8k
Reinhard Agerer Germany	30	1.3k 0.4×	4.1k 1.3×	1.2k 0.6×	521 0.4×	91 0.1×	160	4.7k
Gregory Bonito United States	36	771 0.2×	3.7k 1.1×	1.7k 0.8×	900 0.7×	130 0.2×	141	4.9k
Stéphane Declerck Belgium	38	633 0.2×	4.7k 1.4×	992 0.5×	905 0.7×	250 0.4×	182	5.4k

Countries citing papers authored by Marjo Helander

Since Specialization

Citations

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

Fields of papers citing papers by Marjo Helander

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Marjo Helander

This figure shows the co-authorship network connecting the top 25 collaborators of Marjo Helander. A scholar is included among the top collaborators of Marjo Helander 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 Marjo Helander. Marjo Helander 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

Saikkonen, Kari, et al.. (2025). Betula pendula Roth. survival and growth in treeline is affected by genotype and environment. Scientific Reports. 15(1). 3597–3597. 1 indexed citations

Saikkonen, Kari, Traci Birge, Benjamin Fuchs, et al.. (2024). Toward an integrated understanding of how extreme polar light regimes, hybridization, and light-sensitive microbes shape global biodiversity. One Earth. 7(9). 1529–1541. 1 indexed citations

Fuchs, Benjamin, Riitta Nissinen, Marjo Helander, et al.. (2023). Glyphosate-based herbicide use affects individual microbial taxa in strawberry endosphere but not the microbial community composition. Journal of Applied Microbiology. 134(2). 8 indexed citations

Muola, Anne, et al.. (2023). Endophytic Beauveria bassiana induces biosynthesis of flavonoids in oilseed rape following both seed inoculation and natural colonization. Pest Management Science. 80(5). 2461–2470. 9 indexed citations

Leino, L., Marjo Helander, Irma Saloniemi, et al.. (2020). Classification of the glyphosate target enzyme (5-enolpyruvylshikimate-3-phosphate synthase) for assessing sensitivity of organisms to the herbicide. Journal of Hazardous Materials. 408. 124556–124556. 88 indexed citations

Aldana, Beatriz R. Vázquez de, Päivi H. Leinonen, Íñigo Zabalgogeazcoa, Marjo Helander, & Kari Saikkonen. (2020). Variation and plasticity in Epichloë alkaloid content of Festuca rubra across Europe. Fungal ecology. 47. 100942–100942. 7 indexed citations

Ruuskanen, Suvi, et al.. (2020). Effects of parental exposure to glyphosate-based herbicides on embryonic development and oxidative status: a long-term experiment in a bird model. Scientific Reports. 10(1). 6349–6349. 42 indexed citations

Rainio, Miia J., et al.. (2018). Effects of a glyphosate-based herbicide on survival and oxidative status of a non-target herbivore, the Colorado potato beetle (Leptinotarsa decemlineata). Comparative Biochemistry and Physiology Part C Toxicology & Pharmacology. 215. 47–55. 15 indexed citations

Helander, Marjo, et al.. (2018). Epichloë endophyte effects on leaf blotch pathogen ( Rhynchosporium sp.) of tall fescue ( Schedonorus phoenix ) vary among grass origin and environmental conditions. Plant Ecology & Diversity. 11(5-6). 625–635. 10 indexed citations

10.

Saikkonen, Kari, Juha Mikola, & Marjo Helander. (2015). Endophytic phyllosphere fungi and nutrient cycling in terrestrial ecosystems. Current Science. 109(1). 121–126. 44 indexed citations

11.

Blumenstein, Kathrin, Benedicte Riber Albrectsen, Juan A. Martín, et al.. (2015). Nutritional niche overlap potentiates the use of endophytes in biocontrol of a tree disease. BioControl. 60(5). 655–667. 64 indexed citations

12.

Gundel, Pedro E., et al.. (2014). Fungal endophyte mediated occurrence of seminiferous and pseudoviviparous panicles in Festuca rubra. Fungal Diversity. 66(1). 69–76. 2 indexed citations

13.

Gundel, Pedro E., Lucas A. Garibaldi, Marjo Helander, & Kari Saikkonen. (2013). Symbiotic interactions as drivers of trade-offs in plants: effects of fungal endophytes on tall fescue. Fungal Diversity. 60(1). 5–14. 17 indexed citations

14.

Zabalgogeazcoa, Íñigo, Pedro E. Gundel, Marjo Helander, & Kari Saikkonen. (2013). Non-systemic fungal endophytes in Festuca rubra plants infected by Epichloë festucae in subarctic habitats. Fungal Diversity. 60(1). 25–32. 25 indexed citations

15.

Hamilton, Cyd E., Pedro E. Gundel, Marjo Helander, & Kari Saikkonen. (2012). Endophytic mediation of reactive oxygen species and antioxidant activity in plants: a review. Fungal Diversity. 54(1). 1–10. 227 indexed citations

16.

Gundel, Pedro E., Marjo Helander, Cecilia Casas, et al.. (2012). Neotyphodium fungal endophyte in tall fescue (Schedonorus phoenix): a comparison of three Northern European wild populations and the cultivar Kentucky-31. Fungal Diversity. 60(1). 15–24. 23 indexed citations

17.

Helander, Marjo, et al.. (2011). Environmental conditions and host plant origin override endophyte effects on invertebrate communities. Fungal Diversity. 47(1). 109–118. 41 indexed citations

18.

Saikkonen, Kari, S. Saari, & Marjo Helander. (2010). Defensive mutualism between plants and endophytic fungi?. Fungal Diversity. 41(1). 101–113. 197 indexed citations

19.

Wäli, Piippa R., Marjo Helander, Irma Saloniemi, Jouni U. Ahlholm, & Kari Saikkonen. (2008). Variable effects of endophytic fungus on seedling establishment of fine fescues. Oecologia. 159(1). 49–57. 36 indexed citations

20.

Saikkonen, Kari, Päivi Lehtonen, Marjo Helander, Julia Koricheva, & Stanley H. Faeth. (2006). Model systems in ecology: dissecting the endophyte–grass literature. Trends in Plant Science. 11(9). 428–433. 252 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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