Study on Hastening Maturity of Grape under heating culture condition by pre-sunset temperature increase method (BEOD heating)

2022 Fiscal Year Final Research Report

• Project/Area Number: 20K15526
• Research Category: Grant-in-Aid for Early-Career Scientists
• Allocation Type: Multi-year Fund
• Review Section: Basic Section 39030:Horticultural science-related
• Research Institution: Shimane Agricultural Technology Center
• Principal Investigator: Togano Yasuyuki 島根県農業技術センター, 栽培研究部, 科長 (10512949)
• Project Period (FY): 2020-04-01 – 2023-03-31
• Keywords: 日没前昇温 / 成熟促進効果 / 純同化率（NAR) / 葉色値向上効果 / 同位体トレーサ法 / 転流糖（グルコース） / 葉柄抽出液診断法

Outline of Final Research Achievements

The pre-sunset temperature increase method (BEOD heating) has been shown to increase the photosynthetic rate and assimilate products by raising the temperature inside the plastic house during the period when solar radiation is still present.The 15N tracer method revealed the effect of end of day heating (EOD heating) on improving the leaf color value.The pre-sunset temperature increase method infers that a rapid decrease in temperature increases the concentration of glucose, which is one of the translocated sugars in the petiole. To obtain basic data necessary to understand this phenomenon, I investigated the relationship between glucose concentration measured by high performance liquid chromatography (the usual method) and petiole juice diagnosis method. My findings indicate a strong correlation between the two methods.

Free Research Field

果樹園芸

Academic Significance and Societal Importance of the Research Achievements

この日没前昇温（BEOD加温）は、他品種あるいは加温栽培を行う他の樹種においても導入できると考えられ、この場合加温燃料消費量の大幅な削減に繋がると思われる。
また、光合成同化産物の転流状態を簡易に把握できる新しい手法として、小型反射式光度計を利用した葉柄抽出液診断法の活用の可能性を示すことができた。