Nitrosative stress
nounPronunciation: /naɪˈtroʊseɪtɪv ˈstres/
A condition characterized by excessive accumulation of reactive nitrogen species (RNS) such as nitric oxide and peroxynitrite that exceed the plant's nitrogen detoxification capacity. Nitrosative stress causes protein modification, lipid peroxidation, and disruption of cellular signaling pathways.
Plain English
When plants produce too many harmful nitrogen-containing molecules that damage cells and proteins.
Etymology & History
Usage
"Nitrosative stress markers, including S-nitrosylated proteins, accumulated significantly in heat-stressed wheat seedlings."
Style guide notes: When discussing nitrosative stress, identify specific RNS species (NO, ONOO-) and protein targets modified by nitrosylation.
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Related Terms
Frequently Asked Questions
What is the difference between oxidative and nitrosative stress?
Oxidative stress involves oxygen radicals like superoxide, while nitrosative stress involves nitrogen-containing radicals like nitric oxide.
How do plants defend against nitrosative stress?
Plants use nitric oxide synthase inhibitors and antioxidant systems including glutathione and ascorbate metabolism.
Why Test Candidates on This?
Relevant for advanced research on stress-induced signaling and post-translational protein modifications in abiotic stress responses.
Required skill level: Senior