Plant StudyMolecular Hydrogen Is Involved in Phytohormone Signaling and Stress Responses in PlantsMHID-7838829PMID: 239510752013PLoS ONEJiqing Zeng, Mingyong Zhang, Xuejun SunMolecular hydrogen (H2) metabolism in bacteria and algae has been well studied from an industrial perspective because H2 is viewed as a potential future energy source. A number of clinical trials have recently reported that H2 is a therapeutic antioxidant and signaling molecule. Although H2 metabolism in higher plants was reported in some early studies, its biological effects remain unclear. In th