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Function of isoprenoid quinones and chromanols during oxidative stress in plants

Paper ID Volume ID Publish Year Pages File Format Full-Text
33011 44952 2016 8 PDF Available
Title
Function of isoprenoid quinones and chromanols during oxidative stress in plants
Abstract

•Prenyllipids fulfill both signaling and antioxidant functions under oxidative stress.•They are formed in response to increased production of ROS during oxidative stress.•Prenyllipid oxidation products can still fulfill antioxidant function.•The oxidation products of prenyllipids can be indicators of singlet oxygen stress.

Isoprenoid quinones and chromanols in plants fulfill both signaling and antioxidant functions under oxidative stress. The redox state of the plastoquinol pool (PQ-pool), which is modulated by interaction with reactive oxygen species (ROS) during oxidative stress, has a major regulatory function in both short- and long-term acclimatory responses. By contrast, the scavenging of ROS by prenyllipids affects signaling pathways where ROS play a role as signaling molecules.As the primary antioxidants, isoprenoid quinones and chromanols are synthesized under high-light stress in response to any increased production of ROS. During photo-oxidative stress, these prenyllipids are continuously synthesized and oxidized to other compounds. In turn, their oxidation products (hydroxy-plastochromanol, plastoquinol-C, plastoquinone-B) can still have an antioxidant function. The oxidation products of isoprenoid quinones and chromanols formed specifically in the face of singlet oxygen, can be indicators of singlet oxygen stress.

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Publisher
Database: Elsevier - ScienceDirect
Journal: New Biotechnology - Volume 33, Issue 5, Part B, 25 September 2016, Pages 636–643
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
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