Diverse Biosynthetic Pathways and Protective Functions against Environmental Stress of Antioxidants in Microalgae What is glutathione and why must we protect patient access to it? Heat shock induces cross adaptation to aluminum stress through enhancing ascorbate glutathione cycle in wheat seedlings ScienceDirect Frontiers The Multiple Roles of Ascorbate in the Abiotic Stress Response of Plants: Antioxidant, Cofactor, and Regulator