HIROTSUNA YAMADA

Last Updated :2026/01/07

Affiliations, Positions
Graduate School of Integrated Sciences for Life, Assistant Professor (Special Appointment)
E-mail
hirotsunayamadahiroshima-u.ac.jp
Self-introduction
Special bottle-brash like root system "cluster roots" have a distinct function for phosphorus acquisition in the soil, allowing the plants thrive in extreamly P-poor soils. I study how these plants regulate the cluster-root formation and enhance this physiological activity to maximize phosphorus acquisition.

Basic Information

Educational Backgrounds

  • Hiroshima University, The Frontier Development Program for Genome Editing, 2022/04, 2025/03
  • Hiroshima University, Graduate School of Integrated Sciences for Life, PhD course, 2022/04, 2025/03
  • Visiting PhD Student, The Unversity of Western Australia, School of Biological Sciences, 2023/03, 2024/03
  • Hiroshima University, Graduate School of Integrated Sciences for Life, Master course, 2020/04, 2022/03
  • Hiroshima University, School of Integrated Arts and Sciences, 2016/04, 2020/03

Academic Degrees

  • Hiroshima University
  • PhD, Hiroshima University

Research Keywords

  • Malate transporter
  • Cluster root
  • Phosphorus

Affiliated Academic Societies

  • THe Japanese Society of Plant Physiologists, 2024/04
  • Japanese Society of Soil Science and Plant Nutrition, 2020/04

Educational Activity

Course in Charge

  1. 2025, Liberal Arts Education Program1, 1Term, Experimental Methods and Laboratory Work in Biology I
  2. 2025, Liberal Arts Education Program1, 1Term, Experimental Methods and Laboratory Work in Biology I
  3. 2025, Liberal Arts Education Program1, 1Term, Experimental Methods and Laboratory Work in Biology I
  4. 2025, Liberal Arts Education Program1, 1Term, Experimental Methods and Laboratory Work in Biology I
  5. 2025, Liberal Arts Education Program1, 3Term, Experimental Methods and Laboratory Work in Biology I
  6. 2025, Liberal Arts Education Program1, 3Term, Experimental Methods and Laboratory Work in Biology I
  7. 2025, Liberal Arts Education Program1, 3Term, Experimental Methods and Laboratory Work in Biology I
  8. 2025, Liberal Arts Education Program1, 3Term, Experimental Methods and Laboratory Work in Biology I
  9. 2025, Liberal Arts Education Program1, 3Term, Experimental Methods and Laboratory Work in Biology I
  10. 2025, Liberal Arts Education Program1, 3Term, Experimental Methods and Laboratory Work in Biology I
  11. 2025, Liberal Arts Education Program1, 3Term, Experimental Methods and Laboratory Work in Biology I
  12. 2025, Liberal Arts Education Program1, 3Term, Experimental Methods and Laboratory Work in Biology I
  13. 2025, Liberal Arts Education Program1, 2Term, Experimental Methods and Laboratory Work in Biology II
  14. 2025, Liberal Arts Education Program1, 2Term, Experimental Methods and Laboratory Work in Biology II
  15. 2025, Liberal Arts Education Program1, 2Term, Experimental Methods and Laboratory Work in Biology II
  16. 2025, Liberal Arts Education Program1, 2Term, Experimental Methods and Laboratory Work in Biology II
  17. 2025, Liberal Arts Education Program1, 4Term, Experimental Methods and Laboratory Work in Biology II
  18. 2025, Liberal Arts Education Program1, 4Term, Experimental Methods and Laboratory Work in Biology II
  19. 2025, Liberal Arts Education Program1, 4Term, Experimental Methods and Laboratory Work in Biology II
  20. 2025, Liberal Arts Education Program1, 4Term, Experimental Methods and Laboratory Work in Biology II
  21. 2025, Liberal Arts Education Program1, 4Term, Experimental Methods and Laboratory Work in Biology II
  22. 2025, Liberal Arts Education Program1, 4Term, Experimental Methods and Laboratory Work in Biology II
  23. 2025, Liberal Arts Education Program1, 4Term, Experimental Methods and Laboratory Work in Biology II
  24. 2025, Liberal Arts Education Program1, 4Term, Experimental Methods and Laboratory Work in Biology II
  25. 2025, Undergraduate Education, 3Term, Seminar in English for Life Sciences
  26. 2025, Undergraduate Education, 2Term, Introduction to Life Sciences
  27. 2025, Undergraduate Education, 4Term, Laboratory Work in Life Sciences B
  28. 2025, Undergraduate Education, 4Term, Practical Methods in Life Sciences B
  29. 2025, Undergraduate Education, 1Term, Plant Environmental Physiology
  30. 2025, Undergraduate Education, First Semester, Fundamental Laboratory Work in Biology
  31. 2025, Undergraduate Education, First Semester, Fundamental Methodology in Biology

Research Activities

Academic Papers

  1. ★, Divergent phosphorus-mining strategies in simple and compound cluster roots in extremely phosphorus-impoverished soils in southwest Australia, Plant, Cell & Environment, 2026
  2. ★, HalALMT1 mediates malate efflux in the cortex of mature cluster rootlets of Hakea laurina, occurring naturally in severely phosphorus-impoverished soil, New Phytologist, 202506
  3. Responses to low phosphorus conditions of Triadic sebifera (Euphorbiaceae), an invasive plant species on Miyajima Island, southwest Japan, Soil Science and Plant Nutrition, 20250304
  4. Effects of distinct phosphorus application on physiological responses and rhizosheath bacterial community diversity among three lupin species, Plant and Soil, 20241223
  5. Ethylene works as a possible regulator for the rootlet elongation and transcription of genes for phosphorus acquisition in cluster roots of Lupinus albus L., Soil Science and Plant Nutrition, 20220504
  6. 3. Transport and accumulation of phosphorus and the homeostasis strategies in plants, Japanese Journal of Soil Science and Plant Nutrition, 92(2), 92-98, 20210405

Invited Lecture, Oral Presentation, Poster Presentation

  1. Contrasting phosphorus-mining strageties: Biomass investment in compound cluster roots vs. efficiency of simple cluster roots in severely phosphorus-impoverished environments, Hirotsuna Yamada, Clément E. Gille, Pallavi, Li Yan, Gareth Nealon, Jun Wasaki, Erik Veneklaas, Hans Lambers, 20th International Plant Nutrition Colloquium, 2025/07/24, Without Invitation, English, Porto-Portugal
  2. Dauciform root formation and ion profiles of monocotyledonous plants grown in harsh environments in Japan, Jun Wasaki, Genki Masuda, Akihiro Yamamoto, Daisuke Aoshima, Hirotsuna Yamada, Ryusuke Inoue, Soshi Osaki, Takayuki Nakatsubo, Toshihiro Watanabe, 20th International Plant Nutrition Colloquium, 2025/07/23, Without Invitation, English, Porto-Portugal
  3. HalALMT1 in cluster roots formed by Phosphorus-deficient tolerant plant, Hakea laurina, Hirotsuna Yamada; Lydia Ratna Bunthara; Akira Tanaka; Takuro Kohama; Hayato Maruyama; Wakana Tanaka; Sho Nishida; Takayuki Sasaki; Jun Wasaki, 2024 S-CNC International Symposium, 2024/11/05
  4. Compound and simple cluster roots formed in phosphorus-impoverished soil in south-western Australia are differently efficient but access similar soil phosphorus pools, 2024/09/03
  5. Cluster roots of Hakea laurina up-regulated a malate transporter HalALMT1 under P deficiency, which was activated by aluminum exposure, Hirotsuna Yamada; Lydia Ratna Bunthara; Akira Tanaka; Takuro Kohama; Hayato Maruyama; Wakana Tanaka; Sho Nishida; Takayuki Sasaki; Jun Wasaki, 12th International Symposium of Root Research, 2024/06/03
  6. Malate release properties from cluster roots in Hakea laurina, Hirotsuna Yamada; Lydia Ratna Bunthara; Akira Tanaka; Takuro Kohama; Hayato Maruyama; Wakana Tanaka; Sho Nishida; Takayuki Sasaki; Jun Wasaki, Australia Society of Plant Scientists, 2023/11/29
  7. HalALMT1 encoding malate transporter in cluster roots formed by Hakea laurina, Hirotsuna Yamada; Lydia Ratna Bunthara; Aakira Tanaka; Wakana Tanaka; Sho Nishida; Takayuki Sasaki; Jun Wasaki, The Biodiversity Conference, 2023/10/11
  8. HalALMT1 in cluster roots formed by Phosphorus-deficient tolerant plant, Hakea laurina, Hirotsuna Yamada; Lydia Ratna Bunthara; Akira Tanaka; Takuro Kohama; Hayato Maruyama; Wakana Tanaka; Sho Nishida; Takayuki Sasaki; Jun Wasaki, John Glover Symposium, 2023/10/06
  9. Involvement of hormones in function and development of cluster roots of white lupin (Lupinus albus, Hirotsuna Yamada; Sho Nishida; Jun Wasaki, 7th Symposium on Phosphorus in Soil and Plants, 2022/10/03
  10. The cause that cluster root forms short rootlets in white lupin (Lupinus albus L.), Hirotsuna Yamada; Sho Nishida; Jun Wasaki, 11th Symposium of the International Society of Root Research, 2021/05/27

External Funds

Acceptance Results of Competitive Funds

  1. 2025/04, 2026/03
  2. 2025/07, 2027/03
  3. 2023/04, 2025/03