Clarification of role of photorespiration in plant response to ozone

2016 Fiscal Year Final Research Report

• Project/Area Number: 26340033
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Risk sciences of radiation and chemicals
• Research Institution: National Institute for Environmental Studies
• Principal Investigator: SAJI Hikaru 国立研究開発法人国立環境研究所, 生物・生態系環境研究センター, 上級主席研究員 (00178683)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: オゾン / 光呼吸 / 遺伝子 / シロイヌナズナ / グリコール酸オキシダーゼ

Outline of Final Research Achievements

In order to get information on the mechanism of plant tolerance to ozone, we carried out genetic and physiological analyses on the isolated Arabidopsis ozone-sensitive mutant. We obtained results that the gene responsible for the mutant's ozone sensitivity encodes a photorespiratory enzyme, glycolate oxidase, and the ozone sensitivity was due to the reduced enzyme activity. This mutant also exhibited high sensitivity against sulfur dioxide and a long-term high-intensity light. Two mutant lines that have defects in other photorespiratory enzymes also exhibited high ozone sensitivities. These results suggest that intact photorespiratory flow is neccessary for the plant tolerance to ozone as well as other stress factors.

Free Research Field

植物生理学