Kyoto University

Kobe University

Bunkoukeiki Co., Ltd.

Yufen Che

Kentaro Ifuku

Chikahiro Miyake

Takayuki Sohtome

Shoko Tsuji

The present invention relates to an improved technology for a device that identifies and diagnoses an environmental stress state of plants. An environmental stress diagnosis device comprises a measurement light source, an induction light source, and a transmitted light detector. The measurement light sourceradiates a first measurement light MLand a second measurement light MLto a plant sample S, the induction light sourceradiates a first photosynthesis inducing light FR and a second photosynthesis inducing light AL to the plant sample S, and the transmitted light detectordetects a first transmitted light TLand a second transmitted light TL. The control unithas an analysis circuitand a control circuit. The analysis circuitcalculates a light absorption difference between the first transmitted light TLand the second transmitted light TL, and calculates Y(ND) which is a state in which P700 in photosystem I in photosynthesis has been oxidized as a ROS marker (a reactive oxygen species suppression index) for plants by utilizing the light absorption difference. The analysis circuitdiagnoses an environmental stress state of plants by utilizing the ROS marker.

Growing community of inventors

Kyoto, Japan

Yufen Che