JUN WASAKI

Last Updated :2025/04/03

Affiliations, Positions
Graduate School of Integrated Sciences for Life, Professor
E-mail
junwhiroshima-u.ac.jp
Self-introduction
Major research field is nutrient dynamics of plants. We are mainly focusing on phosphorus (P), which is depleting resource in the world. Recent topics are; functions of root clusters formed under P deficient conditions, P mobilization by root exudates, and improvement P use efficiency by crop plants.

Basic Information

Academic Degrees

  • Doctor of Agriculture, HOKKAIDO UNIVERSITY
  • Master of Agriculture, HOKKAIDO UNIVERSITY

Educational Activity

  • [Bachelor Degree Program] School of Integrated Arts and Sciences : Department of Integrated Arts and Sciences : Integrated Arts and Sciences
  • [Master's Program] Graduate School of Integrated Sciences for Life : Division of Integrated Sciences for Life : Program of Bioresource Science
  • [Master's Program] Graduate School of Integrated Sciences for Life : Division of Integrated Sciences for Life : Program of Life and Environmental Sciences
  • [Doctoral Program] Graduate School of Integrated Sciences for Life : Division of Integrated Sciences for Life : Program of Bioresource Science
  • [Doctoral Program] Graduate School of Integrated Sciences for Life : Division of Integrated Sciences for Life : Program of Life and Environmental Sciences

In Charge of Primary Major Programs

  • Integrated Arts and Sciences

Research Fields

  • Agricultural sciences;Agricultural chemistry;Plant nutrition / Soil science

Educational Activity

Course in Charge

  1. 2025, Liberal Arts Education Program1, 3Term, Cell Science
  2. 2025, Liberal Arts Education Program1, 2Term, Cell Science
  3. 2025, Liberal Arts Education Program1, 3Term, Experimental Methods and Laboratory Work in Biology I
  4. 2025, Liberal Arts Education Program1, 4Term, Experimental Methods and Laboratory Work in Biology II
  5. 2025, Undergraduate Education, Second Semester, Laboratory Work in Natural Sciences
  6. 2025, Undergraduate Education, Second Semester, Practical Methods in Natural Sciences
  7. 2025, Undergraduate Education, 3Term, Seminar in English for Life Sciences
  8. 2025, Undergraduate Education, 2Term, Introduction to Life Sciences
  9. 2025, Undergraduate Education, 1Term, Fundamental Cell Biology
  10. 2025, Undergraduate Education, 4Term, Laboratory Work in Life Sciences B
  11. 2025, Undergraduate Education, 4Term, Practical Methods in Life Sciences B
  12. 2025, Undergraduate Education, 1Term, Plant Environmental Physiology
  13. 2025, Undergraduate Education, First Semester, Fundamental Laboratory Work in Biology
  14. 2025, Undergraduate Education, First Semester, Fundamental Methodology in Biology
  15. 2025, Graduate Education (Master's Program) , 1Term, Special Lectures in Integrated Sciences for Life
  16. 2025, Graduate Education (Master's Program) , 3Term, Research Methods in Life Science
  17. 2025, Graduate Education (Doctoral Program) , Second Semester, Career Development for Life Science
  18. 2025, Graduate Education (Master's Program) , 1Term, Exercises in Bioresource Science A
  19. 2025, Graduate Education (Master's Program) , 2Term, Exercises in Bioresource Science A
  20. 2025, Graduate Education (Master's Program) , 3Term, Exercises in Bioresource ScienceB
  21. 2025, Graduate Education (Master's Program) , 4Term, Exercises in Bioresource ScienceB
  22. 2025, Graduate Education (Master's Program) , Academic Year, Research for Academic Degree Dissertation in Bioresource Science
  23. 2025, Graduate Education (Master's Program) , Academic Year, Research for Academic Degree Dissertation in Life and Environmental Sciences
  24. 2025, Graduate Education (Master's Program) , First Semester, Exercises in Life and Environmental Sciences A
  25. 2025, Graduate Education (Master's Program) , Second Semester, Exercises in Life and Environmental Sciences B
  26. 2025, Graduate Education (Master's Program) , 4Term, Environmental plant sciences and symbiotic microbiology
  27. 2025, Graduate Education (Doctoral Program) , 4Term, Exercises in Integrated Life Sciences
  28. 2025, Graduate Education (Doctoral Program) , Academic Year, Research for Academic Degree Dissertation in Integrated Life Sciences
  29. 2025, Graduate Education (Master's Program) , 4Term, Introduction to Genetics and Genomics

Research Activities

Academic Papers

  1. Interspecific facilitation of micronutrient uptake between cluster-root-bearing trees and non-cluster rooted-shrubs in a Banksia woodland, PLANT AND SOIL, 496(1-2), 71-82, 202403
    Link to Paper Search Results by DOI
  2. Phosphorus absorption kinetics and exudation strategies of roots developed by three lupin species to tackle P deficiency, PLANTA, 259(1), 202401
    Link to Paper Search Results by DOI
  3. Effects of Phosphate-solubilizing Bacteria on Soil Phosphorus Fractions and Supply to Maize Seedlings Grown in Lateritic Red Earths and Cinnamon Soils, MICROBES AND ENVIRONMENTS, 38(2), 2023
    Link to Paper Search Results by DOI
  4. Lipidome Profiling of Phosphorus Deficiency-Tolerant Rice Cultivars Reveals Remodeling of Membrane Lipids as a Mechanism of Low P Tolerance, PLANTS-BASEL, 12(6), 202303
    Link to Paper Search Results by DOI
  5. Phenological shifts of the invasive annual weed Bidens pilosa var. pilosa in response to warmer temperature, PLANT ECOLOGY, 223(10-12), 1155-1165, 202212
    Link to Paper Search Results by DOI
  6. Relationship between soil phosphorus dynamics and low-phosphorus responses at specific root locations of white lupine, SOIL SCIENCE AND PLANT NUTRITION, 68(5-6), 526-535, 20221102
    Link to Paper Search Results by DOI
  7. P6-2-10 Effect of intercropped white lupin on growth and P uptake of maize under different levels and types of phosphorus application., Abstracts of the meeting, the Society of the Science of Soil and Manure, 20130911
  8. Effects of different phosphorus-efficient legumes and soil texture on fractionated rhizosphere soil phosphorus of strongly weathered soils, BIOLOGY AND FERTILITY OF SOILS, 52(3), 367-376, 2016
    Link to Paper Search Results by DOI
  9. Endogenous hormones and expression of senescence-related genes in different senescent types of maize., Journal of Experimental Botany, 56(414), 1117-1128, 20050601
  10. Evaluation of phosphorus starvation inducible genes relating to efficient phosphorus utilization in rice., Plant and Soil, 269(1), 81-87, 20050801
  11. The function of a maize-derived phosphoenolpyruvate carboxylase (PEPC) in phosphorus-deficient transgenic rice., Soil Science and Plant Nutrition, 51(4), 497-506, 20050801
  12. Root exudation, P acquisition and microbial diversity in the rhizosphere of Lupinus albus as affected by P supply and atmospheric CO2 concentration., Journal of Environmental Quality, 34(6), 2157-2166, 20051201
  13. Developmental regulation of photosynthate distribution in leaves of rice., Photosynthetica, 44(1), 1-10, 20060101
  14. Transcriptomic analysis indicates putative metabolic changes caused by manipulation of phosphorus availability in rice leaves., Journal of Experimental Botany, 57(9), 2049-2059, 20060901
  15. Responses to iron limitation in Hordeum vulgare L. as affected by the atmospheric CO2 concentration., Journal of Experimental Botany, 37(3), 1254-1262, 20080301
  16. Cloning and sequencing of the gene for cellobiose 2-epimerase from a ruminal strain of Eubacterium cellulosolvens., FEMS Microbiology Letters, 287(1), 34-40, 20080501
  17. Effects of epilactose on calcium absorption and serum lipid metabolism in rats., Journal of Agricultural and Food Chemistry, 56(21), 10340-10345, 20080901
  18. Influence of arsenic stress on synthesis and localization of low-molecular-weight thiols in Pteris vittata, Environmental Pollution, 158(12), 3663-3669, 201012
  19. Effect of exogenous phosphatase and phytase activities on organic phosphate mobilization in soils with different phosphate adsorption capacities, SOIL SCIENCE AND PLANT NUTRITION, 58(1), 41-51, 2012
  20. Isolation and Characterization of Cellulose-decomposing Bacteria Inhabiting Sawdust and Coffee Residue Composts, MICROBES AND ENVIRONMENTS, 27(3), 226-233, 2012
  21. Phytate Degradation by Fungi and Bacteria that Inhabit Sawdust and Coffee Residue Composts, MICROBES AND ENVIRONMENTS, 28(1), 71-80, 2013
  22. Structure of Novel Enzyme in Mannan Biodegradation Process 4-O-beta-D-Mannosyl-D-Glucose Phosphorylase MGP, JOURNAL OF MOLECULAR BIOLOGY, 425(22), 4468-4478, 2013
  23. The mannobiose-forming exo-mannanase involved in a new mannan catabolic pathway in Bacteroides fragilis, ARCHIVES OF MICROBIOLOGY, 196(1), 17-23, 2014
  24. Prebiotic properties of epilactose., Journal of Dairy Science, 91(12), 4518-4526, 20081201
  25. Element interconnections in Lotus japonicus: a systematic study of the effects of elements additions on different natural variants., Soil Science and Plant Nutrition, 54(1), 91-101, 20090201
  26. Identification of the cellobiose 2-epimerase gene in the genome of Bacteroides fragilis NCTC 9343., Bioscience, Biotechnology and Biochemistry, 73(2), 400-406, 20090201
  27. Overexpression of LASAP2 gene for secretory acid phosphatase of white lupin improves P uptake and growth of tobacco plants., Soil Science and Plant Nutrition, 54(1), 107-113, 20090201
  28. Recent Progress in Plant Nutrition Research: Cross-Talk Between Nutrients, Plant Physiology and Soil Microorganisms, PLANT AND CELL PHYSIOLOGY, 51(8), 1255-1264, 2010
    Link to Paper Search Results by DOI
  29. 9-1 Ionomics study of Lotus japonicus reveals the element homeostasis network in plants, Abstracts of the meeting, the Society of the Science of Soil and Manure, 20080909
  30. 6-7 Screening and characterization of cellulolytic and hemicellulolytic fungi from coffee residues compost and sawdust compost, Abstracts of the meeting, the Society of the Science of Soil and Manure, 20100907
  31. Metabolic alterations proposed by proteome in rice roots grown under low P and high Al concentration under low pH., Plant Science, 172(6), 1157-1165, 20070601
  32. Biotransformation from (+)-catechin to taxifolin due to two steps oxidation; Primary stage of (+)-catechin metabolism by a novel (+)-catechin degradation bacteria, Burkholderia sp., KTC-1 isolated from tropical peat., Biochemical and Biophysical Research Communications, 366(2), 414-419, 20070901
  33. Cloning and sequencing of the cellobiose 2-epimerase gene from an obligatory anaerobe, Ruminococcus albus., Biochemical and Biophysical Research Communications, 360(3), 640-645, 20070901
  34. Analysis of bacterial communities on alkaline phosphatase gene in organic matter applied soil., Soil Science and Plant Nutrition, 54(1), 62-71, 20080201
  35. Localization of acid phosphatase activities in roots of white lupin plants grown under phosphorus-deficient conditions., Soil Science and Plant Nutrition, 54(1), 95-102, 20080201
  36. Secreting portion of acid phosphatase in roots of lupin (Lupinus albus L.) and a key signal for the secretion from the roots., Soil Science and Plant Nutrition, 45(4), 937-945, 19991201
  37. Molecular cloning and root specific expression of secretory acid phosphatase from phosphate deficient lupin (Lupinus albus L.)., Soil Science and Plant Nutrition, 46(2), 427-437, 20000601
  38. Characteristics of phosphoenolpyruvate phosphatase purified from Allium cepa., Plant Science, 161(5), 861-869, 20010501
  39. Cloning and characterization of four phosphate transporter cDNAs in tobacco., Plant Science, 163(4), 837-846, 20020401
  40. Secreted acid phosphatase is expressed in cluster roots of lupin in response to phosphorus deficiency., Plant and Soil, 248(1), 129-136, 20030101
  41. Expression of the OsPI1 gene, cloned from rice roots using cDNA microarray, rapidly responds to phosphorus status., New Phytologist, 158(2), 239-248, 20030601
  42. Structure of Novel Enzyme in Mannan Biodegradation Process 4-O-beta-D-Mannosyl-D-Glucose Phosphorylase MGP, JOURNAL OF MOLECULAR BIOLOGY, 425(22), 4468-4478, 20131115
    Link to Paper Search Results by DOI
  43. The mannobiose-forming exo-mannanase involved in a new mannan catabolic pathway in Bacteroides fragilis, ARCHIVES OF MICROBIOLOGY, 196(1), 17-23, 2014
    Link to Paper Search Results by DOI
  44. ★, Interspecific facilitation of P acquisition in intercropping of maize with white lupin in two contrasting soils as influenced by different rates and forms of P supply, PLANT AND SOIL, 390(1), 223-236, 2015
    Link to Paper Search Results by DOI
  45. Identification and distribution of cellobiose 2-epimerase genes by a PCR-based metagenomic approach, APPLIED MICROBIOLOGY AND BIOTECHNOLOGY, 99(10), 4287-4295, 2015
  46. A new finding of cluster roots formed by Helicia cochinchinensis Lour. (Proteaceae)., The Journal of Japanese Botany, 90(2), 103-108, 201505
  47. Properties of secretory acid phosphatase from lupin roots under phosphorus-deficient conditions., Soil Science and Plant Nutrition, 43(special issue), 981-986, 19971201
  48. Structure of a cDNA for an acid phosphatase from phosphate-deficient lupin (Lupinus albus L.) roots., Soil Science and Plant Nutrition, 45(2), 439-449, 19990601
  49. Breeding wheat for zinc efficiency improvement in semi-arid climate. - A review., Tropics, 12(4), 295-312, 20030801
  50. Transcriptomic analysis of metabolic changes by phosphorus stress in rice plant roots., Plant Cell and Environment, 26(9), 1515-1523, 20030901
  51. Possibility of rhizosphere regulation using acid phosphatase and organic acid for recycling phosphorus in sewage sludge., Soil Science and Plant Nutrition, 50(1), 77-83, 20040201
  52. Low phosphorus tolerance mechanisms: phosphorus recycling and photosynthate partitioning in the tropical forage grass, Brachiaria Hybrid cultivar Mulato compared with rice., Plant and Cell Physiology, 45(4), 460-469, 20040401
  53. Expression of lupin acid phosphatase in transgenic rice for use as a phytate-hydrolyzing enzyme in animal feed., Bioscience, Biotechnology and Biochemistry, 68(7), 1611-1616, 20040701
  54. Plant growth promotion abilities and micro-scale bacterial dynamics in the rhizosphere of lupin analyzed by phytate utilization ability., Environmental Microbiology, 7(3), 396-404, 20050301
  55. Influence of arsenic stress on synthesis and localization of low-molecular-weight thiols in Pteris vittata, ENVIRONMENTAL POLLUTION, 158(12), 3663-3669, 2010
    Link to Paper Search Results by DOI
  56. Proteomic analysis of secreted proteins from aseptically grown rice, PHYTOCHEMISTRY, 72(42830), 312-320, 2011
    Link to Paper Search Results by DOI
  57. New microbial mannan catabolic pathway that involves a novel mannosylglucose phosphorylase, BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS, 408(4), 701-706, 20110520
    Link to Paper Search Results by DOI
  58. Compost amendment enhances population and composition of phosphate solubilizing bacteria and improves phosphorus availability in granitic regosols., Soil Science and Plant Nutrition, 57(4), 529-540, 20110801
  59. Evaluation of cellulolytic and hemicellulolytic abilities of fungi isolated from coffee residue and sawdust composts., Microbes and Environments, 26(3), 220-227, 20110801
  60. Isolation and Characterization of Cellulose-decomposing Bacteria Inhabiting Sawdust and Coffee Residue Composts, MICROBES AND ENVIRONMENTS, 27(3), 226-233, 20120906
    Link to Paper Search Results by DOI
  61. Phytate Degradation by Fungi and Bacteria that Inhabit Sawdust and Coffee Residue Composts, MICROBES AND ENVIRONMENTS, 28(1), 71-80, 20130312
    Link to Paper Search Results by DOI
  62. Overexpression of the LASAP2 gene for secretory acid phosphatase in white lupin improves the phosphorus uptake and growth of tobacco plants, SOIL SCIENCE AND PLANT NUTRITION, 55(1), 107-113, 2009
    Link to Paper Search Results by DOI
  63. Recent Progress in Plant Nutrition Research : Cross-Talk Between Nutrients, Plant Physiology and Soil Microorganisms, Plant and Cell Physiology, 51(8), 1255-1264, 20100801
  64. 9-23 Performances of PEPC transgenic rice plants under phosphorus deficient conditions, Abstracts of the meeting, the Society of the Science of Soil and Manure, 20020325
  65. Interspecific facilitation of P acquisition in intercropping of maize with white lupin in two contrasting soils as influenced by different rates and forms of P supply, PLANT AND SOIL, 390(42737), 223-236, 2015
  66. Production of Lupin Acid Phosphatase in Transgenic Rice for Use as a Phytate-hydrolyzing Enzyme in Animal Feed, Agricultural and Biological Chemistry, 68(7), 1611-1616, 20040723
  67. Effect of exogenous phosphatase and phytase activities on organic phosphate mobilization in soils with different phosphate adsorption capacities, 58(1), 41-51, 20120201
  68. 6-2 Evaluation of cellulolytic and hemicellulolytic abilities of bacteria isolated from coffee residue and sawdust composts, Abstracts of the meeting, the Society of the Science of Soil and Manure, 20110808
  69. PHOSPHORUS-MOBILIZATION STRATEGY BASED ON CARBOXYLATE EXUDATION IN LUPINS (LUPINUS, FABACEAE): A MECHANISM FACILITATING THE GROWTH AND PHOSPHORUS ACQUISITION OF NEIGHBOURING PLANTS UNDER PHOSPHORUS-LIMITED CONDITIONS, EXPERIMENTAL AGRICULTURE, 53(2), 308-319, 2017
    Link to Paper Search Results by DOI
  70. Landrace of Japonica rice, Akamai exhibits enhanced root growth and efficient leaf phosphorus remobilization in response to limited phosphorus availability., Plant and Soil, 414(42737), 327-338, 2017
  71. Landrace of japonica rice, Akamai exhibits enhanced root growth and efficient leaf phosphorus remobilization in response to limited phosphorus availability, PLANT AND SOIL, 414(42737), 327-338, 2017
    Link to Paper Search Results by DOI
  72. Identification of genomic regions associated with low phosphorus tolerance in japonica rice (Oryza sativa L.) by QTL-Seq, SOIL SCIENCE AND PLANT NUTRITION, 64(3), 278-281, 2018
    Link to Paper Search Results by DOI
  73. Organ-specific allocation pattern of acquired phosphorus and dry matter in two rice genotypes with contrasting tolerance to phosphorus deficiency, SOIL SCIENCE AND PLANT NUTRITION, 64(3), 282-290, 2018
    Link to Paper Search Results by DOI
  74. Organic phosphorus in the terrestrial environment: a perspective on the state of the art and future priorities, PLANT AND SOIL, 427(1-2), 191-208, 201806
    Link to Paper Search Results by DOI
  75. Molecular mechanisms underpinning phosphorus-use efficiency in rice, PLANT CELL AND ENVIRONMENT, 41(7), 1483-1496, 201807
    Link to Paper Search Results by DOI
  76. Ancient rice cultivar extensively replaces phospholipids with non-phosphorus glycolipid under phosphorus deficiency, PHYSIOLOGIA PLANTARUM, 163(3), 297-305, 201807
    Link to Paper Search Results by DOI
  77. Distribution and stress tolerance of Fimbristylis dichotoma subsp podocarpa (Cyperaceae) growing in highly acidic solfatara fields, ECOLOGICAL RESEARCH, 33(5), 971-978, 201809
    Link to Paper Search Results by DOI
  78. AtALMT3 is Involved in Malate Efflux Induced by Phosphorus Deficiency in Arabidopsis thaliana Root Hairs, PLANT AND CELL PHYSIOLOGY, 60(1), 107-115, 201901
    Link to Paper Search Results by DOI
  79. Effects of White Lupin and Groundnut on Fractionated Rhizosphere Soil P of Different P-Limited Soil Types in Japan, AGRONOMY-BASEL, 9(2), 201902
    Link to Paper Search Results by DOI
  80. Complementarity of two distinct phosphorus acquisition strategies in maize-white lupine intercropping system under limited phosphorus availability, JOURNAL OF CROP IMPROVEMENT, 35(2), 234-249, 20210304
    Link to Paper Search Results by DOI
  81. Formation of dauciform roots by Japanese native Cyperaceae and their contribution to phosphorus dynamics in soils, PLANT AND SOIL, 461(1-2), 107-118, 202104
    Link to Paper Search Results by DOI
  82. Leaf manganese concentrations as a tool to assess belowground plant functioning in phosphorus-impoverished environments, PLANT AND SOIL, 461(1-2), 43-61, 202104
    Link to Paper Search Results by DOI
  83. Recent insights into the metabolic adaptations of phosphorus-deprived plants, JOURNAL OF EXPERIMENTAL BOTANY, 72(2), 199-223, 20210202
    Link to Paper Search Results by DOI
  84. Multiple analysis of root exudates and microbiome in rice (Oryza sativa) under low P conditions, ARCHIVES OF MICROBIOLOGY, 203(9), 5599-5611, 202111
    Link to Paper Search Results by DOI

Social Activities

Organizing Academic Conferences, etc.

  1. 13th International Conference on the Biogeochemistry of Trace Elements, Local Organizing Committee, 2015/07, 2015/07