photosynthetic electron transport disruption
nounPronunciation: /ˌfoʊtəʊsɪnˈθetɪk ɪˈlektrɑːn ˈtrænspɔːrt dɪsˈrʌpʃən/
The impairment of electron flow through photosystem II and the electron transport chain during abiotic stress, resulting in reduced ATP and NADPH production. This disruption prevents efficient carbon fixation and increases photooxidative damage risk.
Plain English
Damage to the light-dependent reactions that stops plants from making the energy carriers they need for photosynthesis.
Etymology & History
Usage
"Cold stress induces photosynthetic electron transport disruption by damaging photosystem II reaction centers, leading to photoinhibition."
Style guide notes: Distinguish between photosystem II damage and electron transport chain impairment in mechanistic discussions.
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Frequently Asked Questions
How does heat cause photosynthetic electron transport disruption?
Elevated temperatures denature electron transport proteins and destabilize thylakoid membrane structure.
What is the consequence of electron transport disruption for plants?
Reduced energy availability, increased reactive oxygen species production, and impaired growth.
Why Test Candidates on This?
Regularly assessed in photosynthesis and stress physiology courses through spectrophotometric measurement interpretation.
Required skill level: Mid