Fig. 2. (IMAGE) Osaka University Caption Brain glutamate levels are significantly high under short days. Credit 2022, Masaharu Hasebe and Sakiko Shiga, Clock-gene-dependent glutamate dynamics in the bean bug brain regulate photoperiodic reproduction, PLOS Biology Usage Restrictions Credit must be given to the creator. License CC BY Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.