Establishment of cultivation guidelines and a method for bulk quantitative analysis of anthocyanin in black rice in order to give a new added value to the products

2023 Fiscal Year Final Research Report

• Project/Area Number: 19K15798
• Research Category: Grant-in-Aid for Early-Career Scientists
• Allocation Type: Multi-year Fund
• Review Section: Basic Section 38050:Food sciences-related
• Research Institution: Ryukoku University
• Principal Investigator: Yamamoto Ryohei 龍谷大学, 農学部, 実験助手 (70767540)
• Project Period (FY): 2019-04-01 – 2024-03-31
• Keywords: 紫黒米 / アントシアニン / プロファイリング / 環境条件

Outline of Final Research Achievements

The anthocyanin content of 40 cultivars of black rice cultivated from 2018 to 2021 was quantified, and annual differences of 2-4 times were observed in most of the varieties. Among them, some varieties, such as “Shikokuen”, were found to have consistently high anthocyanin content. On the other hand, no relevance to temperature was observed in the paddy fields, even though anthocyanin content decreased significantly at room temperature of 30°C when grown in an artificial climate chamber, indicating the effects of high temperatures. Therefore, the anthocyanin content of black rice in paddy fields was considered to be more strongly affected by other factors such as water and ground temperature rather than that of outside.

Free Research Field

農芸化学

Academic Significance and Societal Importance of the Research Achievements

本研究は、2018年から2021年に栽培した紫黒米40品種のアントシアニン量を定量し、年次間差異などをまとめるとともに、人口気象室内でのポット試験において施肥や光条件との関連性を考察したものである。これまでに、国内で栽培されている紫黒米のアントシアニン量を多品種かつ複数年にわたって網羅的に解析した例はなく、本研究成果は、紫黒米の安定生産のための品種選択や栽培指針の設定を行う上での一助となることが期待される。