Enhancement of antioxidant capacity of plant leaves by dynamic variation of light intensity

Research Project

Project/Area Number	26660199
Research Category	Grant-in-Aid for Challenging Exploratory Research
Allocation Type	Multi-year Fund
Research Field	Agricultural environmental engineering/Agricultural information engineering
Research Institution	Yamaguchi University
Principal Investigator	Ibaraki Yasuomi 山口大学, 農学部, 教授 (50242160)
Project Period (FY)	2014-04-01 – 2016-03-31
Project Status	Completed (Fiscal Year 2015)
Budget Amount *help	¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000) Fiscal Year 2015: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000) Fiscal Year 2014: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Keywords	LED / ORAC / 補光 / 光光合成曲線 / 変動係数 / 光変動 / 植物工場 / ベビーリーフ / 光環境制御
Outline of Final Research Achievements	In this study, the effects of dynamic variation of light intensity on antioxidant capacity (ORAC) and growth of lettuce leaves were investigated to acquire innovative knowledge on light environment control in plant production. The moderate variation of light intensity by supplementary lighting promoted lettuce growth. In addition, continuous irradiation with low PPFD had a potential to promote the growth but reduce the antioxidant capacity under constant daily cumulative PPFD. These results suggested that dynamic variation of light intensity might affect growth and antioxidant capacity of lettuce leaves.

Report

(3 results)