Mechanism underlying the damage to plants induced by boron deficiency

2022 Fiscal Year Final Research Report

• Project/Area Number: 20K05767
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 38010:Plant nutrition and soil science-related
• Research Institution: Kyoto University
• Principal Investigator: Kobayashi Masaru 京都大学, 農学研究科, 准教授 (60281101)
• Project Period (FY): 2020-04-01 – 2023-03-31
• Keywords: 植物 / ホウ素欠乏 / 栄養ストレス / 細胞壁 / ペクチン / ペルオキシダーゼ / 活性酸素分子種

Outline of Final Research Achievements

To elucidate the mechanisms by which boron (B) deficiency damages plant cells, the early responses of liquid-cultured Arabidopsis seedlings against deprivation of B were analyzed. The results showed that the cell wall strength of the root elongation zone was decreased as early as 20 minutes after B deprivation. The results also suggested that the treatment activated cell wall peroxidase to enhance superoxide production. These findings give insights into how boron deficiency causes oxidative damage to the cells.

Free Research Field

植物栄養学

Academic Significance and Societal Importance of the Research Achievements

土壌に十分量のホウ素が含まれず、ホウ素欠乏が作物生産の制限要因となっている地域は世界各地に存在する。本研究では、ホウ素欠乏で細胞壁ペルオキシダーゼが活性化しスーパーオキシドが過剰生成することを示す証拠が得られた。スーパーオキシドを含む活性酸素分子種の蓄積はホウ素欠乏障害の直接の原因物質と推定される。本研究の成果はその生成機作の解明に資するものであり、ホウ素欠乏障害の回避法の開発や欠乏耐性品種の作出につながる可能性がある。