Investigation of a novel nutrient distribution mechanism in the "calyx" of Solanaceae plants.

2023 Fiscal Year Final Research Report

• Project/Area Number: 21K14761
• Research Category: Grant-in-Aid for Early-Career Scientists
• Allocation Type: Multi-year Fund
• Review Section: Basic Section 38010:Plant nutrition and soil science-related
• Research Institution: Research Institute of Environment, Agriculture and Fisheries, Osaka Prefecture
• Principal Investigator: Arakawa Ryota 地方独立行政法人大阪府立環境農林水産総合研究所(環境研究部、食と農の研究部及び水産研究部), その他部局等, 主任研究員 (40761648)
• Project Period (FY): 2021-04-01 – 2024-03-31
• Keywords: ホウ素 / パプリカ / 胎座 / 隔壁 / 細胞壁 / マグネシウム / カルシウム

Outline of Final Research Achievements

This study was conducted based on the hypothesis that the localization of calcium and/or boron in the calyx of Solanaceae plants is closely related to the development of blossom-end rot, but no changes in the localization of the elements in the calyx or in the expression of transporters were observed. On the other hand, the expression of genes encoding enzymes involved in cell wall hardening/softening in the pericarp and their relationship to the incidence of blossom-end rot were suggested. The results also indicated that the incidence of blossom-end rot in paprika occurs at the junction of the pericarp and the septum, suggesting that the lack of boron distribution in the septum causes cell wall formation in the adjacent pericarp, resulting in the incidence of blossom-end rot.

Free Research Field

植物栄養学

Academic Significance and Societal Importance of the Research Achievements

ナス科植物における果皮の元素濃度と尻腐れ発症との関係性を調査した研究例はこれまで数多く存在するが、果実を構成する各部位の元素分配と尻腐れ発症との関係について調査した研究例はほとんどなく、さらに、胎座（隔壁）に分配されるホウ素と尻腐れ発症との関係性を見出した報告例もないため、方法論および得られた結果ともに学術的意義は高い。今後、得られた知見をもとに、尻腐れ発症を劇的に抑える技術の開発に繋がれば、ナス科作物の生産性向上に大きく寄与できる可能性がある。