Journal ArticleDOI
Reactive Oxygen Species and Antioxidants in Plants: An Overview
TLDR
Various aspects relating to sensors for ROS and signaling role of ROS in plants, improvement of antioxidant systems in transgenic plants and functional genomics approaches used to unravel the reactive oxygen gene network has been discussed.Abstract:
Plants exposed to biotic and abiotic stresses generate more reactive oxygen species (ROS) than their capacity to scavenge them. Biological molecules are susceptible to attack by ROS, including several proteins, polyunsaturated fatty acids and nucleic acids. The cellular arsenal for scavenging ROS and toxic organic radicals include ascorbate, glutathione, tocopherol, carotenoids, polyphenols, alkaloids and other compounds. Enzymatic antioxidants including superoxide dismutase, peroxidase, catalase and glutathione reductase detoxify either by quenching toxic compounds or regenerating antioxidants involving reducing power. Various aspects relating to sensors for ROS and signaling role of ROS in plants, improvement of antioxidant systems in transgenic plants and functional genomics approaches used to unravel the reactive oxygen gene network has been discussed.read more
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Journal ArticleDOI
Insects feeding on plants: rapid signals and responses preceding the induction of phytochemical release.
TL;DR: This review will focus on rapid early events following insect feeding on plants that eventually lead to the production and release of phytochemicals and compare and discuss the impact of mechanical and biotroph wounding.
Journal ArticleDOI
Total phenolics, flavonoids and antioxidant activity of tropical fruit pineapple
TL;DR: Pineapple has several beneficial properties including antioxidant activity. as discussed by the authors extracted the fruit of pineapple with ethyl acetate, methanol and water and determined the phenolic content of the extracts by Folin-Ciocalteu method and antioxidant activity was assayed through some in vitro models such as phosphomolybdenum, β-carotene-linoleate, and radical scavenging activity using α,α-diphenyl-β-picrylhydrazyl (DPPH) method.
Journal ArticleDOI
Cadmium tolerance in six poplar species
Jiali He,Chaofeng Ma,Yonglu Ma,Hong Li,Jingquan Kang,Tong-Xian Liu,Andrea Polle,Changhui Peng,Zhi-Bin Luo +8 more
TL;DR: It is concluded that P. cathayana (zhonghua 1) is superior to other five species for Cd phyto-remediation, and its well-coordinated physiological changes under Cd exposure confer the great Cd tolerance of this species.
Journal ArticleDOI
Hormesis in plants: Physiological and biochemical responses.
Arshad Jalal,José Carlos de Oliveira Junior,Janaína Santos Ribeiro,Guilherme Carlos Fernandes,Giovana Guerra Mariano,Vanessa Dias Rezende Trindade,André Rodrigues dos Reis +6 more
TL;DR: This review compiles information on how hormesis in plants can be used to achieve new production levels and identifies herbicides with active ingredients glyphosate, 2,4-D and paraquat as potential candidates.
Journal ArticleDOI
In vitro total phenolics, flavonoids contents and antioxidant activity of essential oil, various organic extracts from the leaves of tropical medicinal plant Tetrastigma from Sabah.
TL;DR: The findings show that the extent of antioxidant activity of the essential oil and all extracts are in accordance with the amount of phenolics present in that extract.
References
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Journal ArticleDOI
Oxidative stress, antioxidants and stress tolerance
TL;DR: Key steps of the signal transduction pathway that senses ROIs in plants have been identified and raise several intriguing questions about the relationships between ROI signaling, ROI stress and the production and scavenging ofROIs in the different cellular compartments.
Journal ArticleDOI
Reactive oxygen gene network of plants
TL;DR: In Arabidopsis, a network of at least 152 genes is involved in managing the level of ROS, and this network is highly dynamic and redundant, and encodes ROS-scavenging and ROS-producing proteins.
Journal ArticleDOI
Antioxidant properties of phenolic compounds
TL;DR: It is now possible to establish the antioxidant activities of plant-derived flavonoids in the aqueous and lipophilic phases, and to assess the extent to which the total antioxidant potentials of wine and tea can be accounted for by the activities of individual polyphenols.
Journal ArticleDOI
Antioxidants, Oxidative Damage and Oxygen Deprivation Stress: a Review
TL;DR: Factors which possibly affect the effectiveness of antioxidant protection under oxygen deprivation as well as under other environmental stresses are presented.
Journal ArticleDOI
Redox homeostasis and antioxidant signaling: a metabolic interface between stress perception and physiological responses.
Christine H. Foyer,Graham Noctor +1 more
TL;DR: Growing evidence suggests a model for redox homeostasis in which the reactive oxygen species (ROS)–antioxidant interaction acts as a metabolic interface for signals derived from metabolism and from the environment.
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