Characterization and application of symbiotic bacteria isolated from plants adapted to highly acidic soils.

• Project/Area Number: 25870789
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Applied microbiology; Environmental agriculture(including landscape science)
• Research Institution: Nihon University (2013, 2015); Nihon University Junior College (2014)
• Principal Investigator: AIZAWA Tomoko 日本大学, 生物資源科学部, 助教 (60398849)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Project Status: Completed (Fiscal Year 2015)
• Budget Amount: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000); Fiscal Year 2015: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000); Fiscal Year 2014: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000); Fiscal Year 2013: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
• Keywords: 根圏微生物 / 酸性土壌 / アルミニウム耐性 / アルミニウム / バイオフィルム / プロテオーム / 重金属 / 多糖 / 構造解析

Outline of Final Research Achievements

Below pH 4.5, aluminum (Al) becomes more soluble in soils and consequently toxic to plants and their rhizospheric microorganisms, which can cause serious destruction of the environment and significant economic loss. Although there have been numerous reports on the toxicity of acid soils and the tolerance mechanisms in plants and microorganisms, especially the Al-toxicity and tolerance mechanisms, the research is still necessary to overcome the problems. Our results suggested that consortia or individual strains of symbiotic bacteria of plants growing in AASS areas might play important roles in the adaptation of these plants and may promote the growth of crop plants under acidic conditions. This knowledge will greatly help the development of new bioremediation methods for AASS areas, e.g., new bacterial inoculants to increase crop yield in AASS areas and neutralization of AASS by use of plant-microbe symbiotic systems.

Research Products

• [Journal Article] An Anionic Polymer Incorporating Low Amounts of Hydrophobic Residues Is a Mul-tifunctional Surfactant. Part 1: Thickening, Emulsifying, Moisture-absorption and Moisture-retention Abilities of a Fatty Ac-id-Containing Anionic Polysaccharide (2015)
  • Author(s): Makoto Urai, Tomoko Aizawa, Mutsuyasu Nakajima, and Michio Sunairi
  • Journal Title: Advances in Chemical Engineering and Science Volume: 5 Issue: 02 Pages: 173-180
  • DOI: 10.4236/aces.2015.52019
  • Peer Reviewed / Open Access
• [Journal Article] An Anionic Polymer Incorporating Low Amounts of Hydrophobic Residues Is a Multifunctional Surfactant. Part 2: Emulsification, Moisture Absorption, and Moisture Retention of Alkyl Esterified Poly-γGlutamic Acid (2015)
  • Author(s): Makoto Urai, Tomoko Aizawa, Mutsuyasu Nakajima, and Michio Sunairi
  • Journal Title: Advances in Chemical Engineering and Science Volume: 5 Issue: 02 Pages: 181-191
  • DOI: 10.4236/aces.2015.52020
  • Peer Reviewed / Open Access