領 域 名 園芸科学
教員氏名 榎 真一
研究分野 果樹園芸学
研究キーワード： 果樹園芸，果実品質，樹勢制御，遺伝資源，環境ストレス
果樹の生長と果実品質を「科学」で解き明かす
― ブドウを対象としたフィールド×分子生理研究による持続可能な果樹生産 ―
最近の研究課題
１．果樹の生長をコントロールする仕組みの解明 －剪定や樹形管理の省力化－
果樹は樹勢が強すぎると管理負担が増え，弱すぎると収量や品質が低下します．
ブドウをモデルに「枝の伸長」「開花」「果実肥大」
といった生長を制御する仕組みを，植物ホルモンの
働きに注目し，附属農場で得た生育データと遺伝子解析を組み合わせて研究を進めています．
２．高温・乾燥環境でも品質のよい果実をつくる技術開発
近年の温暖化により，果実の着色不良や日焼けなどの品質低下が問題となっています．
本研究ではブドウや柑橘等を対象に，高温環境下
での果実品質低下の原因を解明し，温暖地に適した安定生産技術の開発を進めています．
３ ．遺伝資源を活かした果樹品種の特性解明と育種応用
野生ブドウや香川大学育成品種「香大農R-1」などの果樹遺伝資源を対象に，ゲノムDNA情報を活用した品種特性の解析を行い，耐病性や
環境適応性，ワイン向けの果実品質に優れた次世代品種の開発への応用を目指しています．
代表的な研究業績
Suzuki, M., Kimura, A., Suzuki, S., & Enoki, S*. (2024). Application of Synephrine to Grape
Increases Anthocyanin via Production of Hydrogen Peroxide, Not Phytohormones. International
Journal of Molecular Sciences, 25(11), 5912.
Enoki, S*., Tanaka, K., Moriyama, A., Hanya, N., Mikami, N., & Suzuki, S. (2023). Grape
cytochrome P450 CYP90D1 regulates brassinosteroid biosynthesis and increases vegetative
growth. Plant Physiology and Biochemistry, 196, 993-1001.
Tanaka, K., Hamaguchi, Y., Suzuki, S., & Enoki, S*. (2020). Genomic Characterization of the
Japanese Indigenous Wine Grape Vitis sp. cv. Koshu. Frontiers in Plant Science, 11, 532211.
Research Area: Horticultural Science
Research Specialization: Pomology
Name: ENOKI, Shinichi
Key ward： Fruit tree horticulture, fruit quality, vegetative vigor regulation, genetic resources, environmental stress
Linking field studies and molecular physiology
to understand fruit tree growth and fruit quality
Recent Research
１．Elucidation of the mechanisms controlling fruit tree growth
— Toward labor-saving pruning and canopy management —
Excessive or insufficient vegetative vigor in fruit trees negatively affects labor efficiency, yield, and fruit quality. Using grapevine as a model, we study the regulation of shoot growth, flowering, and fruit development, focusing on plant hormone functions.
２．Improving fruit quality under high-temperature conditions
Recent climate warming has caused fruit quality deterioration, such as poor coloration and sunburn. Focusing on grapevine and citrus, we investigate the mechanisms of quality loss under high-temperature conditions and develop stable production technologies suited to warm climates.
３ ．Genetic characterization and breeding utilization of fruit tree resources
We use genomic DNA information to characterize fruit tree genetic resources, including wild grapes and the cultivar “Kadai-Nou R-1,” and apply this knowledge to the development of improved cultivars for warm regions and winemaking.
Publications
Suzuki, M., Kimura, A., Suzuki, S., & Enoki, S*. (2024). Application of Synephrine to Grape
Increases Anthocyanin via Production of Hydrogen Peroxide, Not Phytohormones. International
Journal of Molecular Sciences, 25(11), 5912.
Enoki, S*., Tanaka, K., Moriyama, A., Hanya, N., Mikami, N., & Suzuki, S. (2023). Grape
cytochrome P450 CYP90D1 regulates brassinosteroid biosynthesis and increases vegetative
growth. Plant Physiology and Biochemistry, 196, 993-1001.
Tanaka, K., Hamaguchi, Y., Suzuki, S., & Enoki, S*. (2020). Genomic Characterization of the
Japanese Indigenous Wine Grape Vitis sp. cv. Koshu. Frontiers in Plant Science, 11, 532211.
領 域 名 園芸科学
教員氏名 榎 真一
研究分野 果樹園芸学
研究キーワード： 果樹園芸，果実品質，樹勢制御，遺伝資源，環境ストレス
果樹の生長と果実品質を「科学」で解き明かす
― ブドウを対象としたフィールド×分子生理研究による持続可能な果樹生産 ―
最近の研究課題
１．果樹の生長をコントロールする仕組みの解明 －剪定や樹形管理の省力化－
果樹は樹勢が強すぎると管理負担が増え，弱すぎると収量や品質が低下します．
ブドウをモデルに「枝の伸長」「開花」「果実肥大」
といった生長を制御する仕組みを，植物ホルモンの
働きに注目し，附属農場で得た生育データと遺伝子解析を組み合わせて研究を進めています．
２．高温・乾燥環境でも品質のよい果実をつくる技術開発
近年の温暖化により，果実の着色不良や日焼けなどの品質低下が問題となっています．
本研究ではブドウや柑橘等を対象に，高温環境下
での果実品質低下の原因を解明し，温暖地に適した安定生産技術の開発を進めています．
３ ．遺伝資源を活かした果樹品種の特性解明と育種応用
野生ブドウや香川大学育成品種「香大農R-1」などの果樹遺伝資源を対象に，ゲノムDNA情報を活用した品種特性の解析を行い，耐病性や
環境適応性，ワイン向けの果実品質に優れた次世代品種の開発への応用を目指しています．
代表的な研究業績
Suzuki, M., Kimura, A., Suzuki, S., & Enoki, S*. (2024). Application of Synephrine to Grape
Increases Anthocyanin via Production of Hydrogen Peroxide, Not Phytohormones. International
Journal of Molecular Sciences, 25(11), 5912.
Enoki, S*., Tanaka, K., Moriyama, A., Hanya, N., Mikami, N., & Suzuki, S. (2023). Grape
cytochrome P450 CYP90D1 regulates brassinosteroid biosynthesis and increases vegetative
growth. Plant Physiology and Biochemistry, 196, 993-1001.
Tanaka, K., Hamaguchi, Y., Suzuki, S., & Enoki, S*. (2020). Genomic Characterization of the
Japanese Indigenous Wine Grape Vitis sp. cv. Koshu. Frontiers in Plant Science, 11, 532211.
Research Area: Horticultural Science
Research Specialization: Pomology
Name: ENOKI, Shinichi
Linking field studies and molecular physiology
to understand fruit tree growth and fruit quality
Key ward： Fruit tree horticulture, fruit quality, vegetative vigor regulation, genetic resources, environmental stress
Recent Research
１．Elucidation of the mechanisms controlling fruit tree growth
— Toward labor-saving pruning and canopy management —
Excessive or insufficient vegetative vigor in fruit trees negatively affects labor efficiency, yield, and fruit quality. Using grapevine as a model, we study the regulation of shoot growth, flowering, and fruit development, focusing on plant hormone functions.
２．Improving fruit quality under high-temperature conditions
Recent climate warming has caused fruit quality deterioration, such as poor coloration and sunburn. Focusing on grapevine and citrus, we investigate the mechanisms of quality loss under high-temperature conditions and develop stable production technologies suited to warm climates.
３ ．Genetic characterization and breeding utilization of fruit tree resources
We use genomic DNA information to characterize fruit tree genetic resources, including wild grapes and the cultivar “Kadai-Nou R-1,” and apply this knowledge to the development of improved cultivars for warm regions and winemaking.
Publications
Suzuki, M., Kimura, A., Suzuki, S., & Enoki, S*. (2024). Application of Synephrine to Grape
Increases Anthocyanin via Production of Hydrogen Peroxide, Not Phytohormones. International
Journal of Molecular Sciences, 25(11), 5912.
Enoki, S*., Tanaka, K., Moriyama, A., Hanya, N., Mikami, N., & Suzuki, S. (2023). Grape
cytochrome P450 CYP90D1 regulates brassinosteroid biosynthesis and increases vegetative
growth. Plant Physiology and Biochemistry, 196, 993-1001.
Tanaka, K., Hamaguchi, Y., Suzuki, S., & Enoki, S*. (2020). Genomic Characterization of the
Japanese Indigenous Wine Grape Vitis sp. cv. Koshu. Frontiers in Plant Science, 11, 532211.
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