Hiroshi Ashihara

3.6k total citations
51 papers, 2.6k citations indexed

About

Hiroshi Ashihara is a scholar working on Molecular Biology, Plant Science and Pharmacology. According to data from OpenAlex, Hiroshi Ashihara has authored 51 papers receiving a total of 2.6k indexed citations (citations by other indexed papers that have themselves been cited), including 36 papers in Molecular Biology, 20 papers in Plant Science and 18 papers in Pharmacology. Recurrent topics in Hiroshi Ashihara's work include Plant tissue culture and regeneration (21 papers), Coffee research and impacts (18 papers) and Polyamine Metabolism and Applications (15 papers). Hiroshi Ashihara is often cited by papers focused on Plant tissue culture and regeneration (21 papers), Coffee research and impacts (18 papers) and Polyamine Metabolism and Applications (15 papers). Hiroshi Ashihara collaborates with scholars based in Japan, United Kingdom and Canada. Hiroshi Ashihara's co-authors include Alan Crozier, Claudio Stasolla, Trevor A. Thorpe, Riko Katahira, Hiroshi Sano, Xin‐Qiang Zheng, Misako Kato, Fiona M. Gillies, Kouichi Mizuno and Natalia Loukanina and has published in prestigious journals such as PLANT PHYSIOLOGY, FEBS Letters and Trends in Plant Science.

In The Last Decade

Hiroshi Ashihara

51 papers receiving 2.5k citations

Peers

Hiroshi Ashihara

PHARM

PFM

P. Giridhar India

Margarida A. Ferreira Portugal

Heidi Halbwirth Austria

R. Viani Switzerland

Marcos José Salvador Brazil

Antonio Caño Spain

Shlomo Grossman Israel

Domenico Castaldo Italy

Dorota Żyżelewicz Poland

Maike Petersen Germany

P. Giridhar India

Hiroshi Ashihara

1.3k ×0.9

1.9k ×2.0

404 ×0.5

PHARM

187 ×0.4

PFM

1.1k ×3.9

Citations per year, relative to Hiroshi Ashihara Hiroshi Ashihara (= 1×) peers P. Giridhar

Countries citing papers authored by Hiroshi Ashihara

Since Specialization

Citations

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

Fields of papers citing papers by Hiroshi Ashihara

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Hiroshi Ashihara

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

Ashihara, Hiroshi, Kouichi Mizuno, Takao Yokota, & Alan Crozier. (2017). Xanthine Alkaloids: Occurrence, Biosynthesis, and Function in Plants. Fortschritte der Chemie Organischer Naturstoffe/Fortschritte der Chemie organischer Naturstoffe/Progress in the chemistry of organic natural products. 105. 1–88. 56 indexed citations

Yin, Yuling, Gina Borges, Masaaki Sakuta, Alan Crozier, & Hiroshi Ashihara. (2012). Effect of phosphate deficiency on the content and biosynthesis of anthocyanins and the expression of related genes in suspension-cultured grape (Vitis sp.) cells. Plant Physiology and Biochemistry. 55. 77–84. 25 indexed citations

Ashihara, Hiroshi. (2011). Xanthosine metabolism in plants: Metabolic fate of exogenously supplied 14C-labelled xanthosine and xanthine in intact mungbean seedlings. Phytochemistry Letters. 5(1). 100–103. 8 indexed citations

Ashihara, Hiroshi, Misako Kato, & Alan Crozier. (2010). Distribution, Biosynthesis and Catabolism of Methylxanthines in Plants. Handbook of experimental pharmacology. 11–31. 47 indexed citations

Ashihara, Hiroshi, Hiroshi Sano, & Alan Crozier. (2007). Caffeine and related purine alkaloids: Biosynthesis, catabolism, function and genetic engineering. Phytochemistry. 69(4). 841–856. 299 indexed citations

Ashihara, Hiroshi, et al.. (2006). Caffeine biosynthesis and adenine metabolism in transgenic Coffea canephora plants with reduced expression of N-methyltransferase genes. Phytochemistry. 67(9). 882–886. 17 indexed citations

Yin, Yue, et al.. (2006). Involvement of rapid nucleotide synthesis in recovery from phosphate starvation of Catharanthus roseus cells. Journal of Experimental Botany. 58(5). 1025–1033. 13 indexed citations

Katahira, Riko & Hiroshi Ashihara. (2006). Profiles of purine biosynthesis, salvage and degradation in disks of potato (Solanum tuberosum L.) tubers. Planta. 225(1). 115–126. 61 indexed citations

Stasolla, Claudio, Natalia Loukanina, Hiroshi Ashihara, Edward C. Yeung, & Trevor A. Thorpe. (2006). Comparative studies on pyrimidine metabolism in excised cotyledons of Pinus radiata during shoot formation in vitro. Journal of Plant Physiology. 164(4). 429–441. 4 indexed citations

10.

Ye, Chuangxing, et al.. (2005). Substrate specificity of N-methyltransferase involved in purine alkaloids synthesis is dependent upon one amino acid residue of the enzyme. Molecular Genetics and Genomics. 275(2). 125–135. 57 indexed citations

11.

Ashihara, Hiroshi, et al.. (2005). Effect of long-term phosphate starvation on the levels and metabolism of purine nucleotides in suspension-cultured Catharanthus roseus cells. Phytochemistry. 67(2). 132–141. 16 indexed citations

12.

Zheng, Xin‐Qiang, Yoko Koyama, Chifumi Nagai, & Hiroshi Ashihara. (2004). Biosynthesis, accumulation and degradation of theobromine in developing Theobroma cacao fruits. Journal of Plant Physiology. 161(4). 363–369. 41 indexed citations

13.

Ashihara, Hiroshi. (2004). Distribution and biosynthesis of caffeine in plants. Frontiers in bioscience. 9(1-3). 1864–1864. 114 indexed citations

14.

Stasolla, Claudio, Riko Katahira, Trevor A. Thorpe, & Hiroshi Ashihara. (2003). Purine and pyrimidine nucleotide metabolism in higher plants. Journal of Plant Physiology. 160(11). 1271–1295. 292 indexed citations

15.

Stasolla, Claudio, Natalia Loukanina, Hiroshi Ashihara, Edward C. Yeung, & Trevor A. Thorpe. (2003). Changes in deoxyribonucleotide biosynthesis during carrot somatic embryogenesis. Plant Physiology and Biochemistry. 41(9). 779–785. 8 indexed citations

16.

Mizuno, Kouichi, et al.. (2002). Isolation of a new dual‐functional caffeine synthase gene encoding an enzyme for the conversion of 7‐methylxanthine to caffeine from coffee (Coffea arabica L.)¹. FEBS Letters. 534(1-3). 75–81. 80 indexed citations

17.

Zheng, Xin‐Qiang, Chuangxing Ye, Misako Kato, Alan Crozier, & Hiroshi Ashihara. (2002). Theacrine (1,3,7,9-tetramethyluric acid) synthesis in leaves of a Chinese tea, kucha (Camellia assamica var. kucha). Phytochemistry. 60(2). 129–134. 70 indexed citations

18.

Ashihara, Hiroshi, Claudio Stasolla, Natalia Loukanina, & Trevor A. Thorpe. (2001). Purine metabolism during white spruce somatic embryo development: salvage of adenine, adenosine, and inosine. Plant Science. 160(4). 647–657. 49 indexed citations

19.

Stasolla, Claudio, Natalia Loukanina, Hiroshi Ashihara, Edward C. Yeung, & Trevor A. Thorpe. (2001). Changs in pyrimidine nucleotide biosynthesis during germination of white spruce (picea glauca) somatic embryos. In Vitro Cellular & Developmental Biology - Plant. 37(2). 285–292. 17 indexed citations

20.

Ashihara, Hiroshi, et al.. (1993). Pyrophosphate: fructose-6-phosphate 1-phosphotransferase and biosynthetic capacity during differentiation of hypocotyls of Vigna seedlings. Biochimica et Biophysica Acta (BBA) - General Subjects. 1156(2). 123–127. 10 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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