Climate Change and Secondary Metabolism in Plants: Resilience to Disruption

Singh, Sarita; Rai, Kshama; Ansari, Naushad; Agrawal, Shashi Bhushan

doi:10.1016/b978-0-12-816483-9.00005-0

Cited by 2 publications

(1 citation statement)

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“…On the one hand, species dominance shifts by changes in land use, and more extensive outbreaks of insects are expected, especially in forests [ 106 , 147 , 148 ]. Simultaneously, temperature variation becomes more extreme with the mean global temperature rising; however, more pronounced cold periods may occur, while the frequency of flooding and drought events rises [ 106 , 147 , 148 , 149 ]. Not only is soil nutrient availability changing, but the pollution of soil (as well as air and water) is constantly increasing as a result of anthropogenic activities [ 106 , 149 ].…”

Section: Influence Of Oxylipins On the Redox-regulatory Networkmentioning

confidence: 99%

Oxylipins and Reactive Carbonyls as Regulators of the Plant Redox and Reactive Oxygen Species Network under Stress

2023

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Reactive oxygen species (ROS), and in particular H2O2, serve as essential second messengers at low concentrations. However, excessive ROS accumulation leads to severe and irreversible cell damage. Hence, control of ROS levels is needed, especially under non-optimal growth conditions caused by abiotic or biotic stresses, which at least initially stimulate ROS synthesis. A complex network of thiol-sensitive proteins is instrumental in realizing tight ROS control; this is called the redox regulatory network. It consists of sensors, input elements, transmitters, and targets. Recent evidence revealed that the interplay of the redox network and oxylipins–molecules derived from oxygenation of polyunsaturated fatty acids, especially under high ROS levels–plays a decisive role in coupling ROS generation and subsequent stress defense signaling pathways in plants. This review aims to provide a broad overview of the current knowledge on the interaction of distinct oxylipins generated enzymatically (12-OPDA, 4-HNE, phytoprostanes) or non-enzymatically (MDA, acrolein) and components of the redox network. Further, recent findings on the contribution of oxylipins to environmental acclimatization will be discussed using flooding, herbivory, and establishment of thermotolerance as prime examples of relevant biotic and abiotic stresses.

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