Chlorophyll Degradation Under Stress
noun phrasePronunciation: /klɔːrəˈfɪl ˈdeɡreɪdeɪʃən ʌndər stres/
The breakdown and loss of chlorophyll pigments during abiotic stress, leading to reduced light capture and photosynthetic capacity. This degradation occurs through enzymatic breakdown of the porphyrin ring and magnesium loss from the chlorophyll molecule.
Plain English
Stress causes breakdown of the green pigment in leaves, reducing their ability to capture light for photosynthesis.
Etymology & History
Usage
"Chlorophyll degradation under cold stress manifests as yellowing and senescence of plant leaves."
Style guide notes: Specify the type of stress (heat, cold, drought) when discussing chlorophyll degradation for precision.
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Related Terms
Frequently Asked Questions
What causes chlorophyll degradation during abiotic stress?
ROS attack, reduced nutrient availability, and enzymatic breakdown via chlorophyllase accelerate pigment degradation.
How does chlorophyll loss affect plant survival during stress?
Reduced photosynthetic capacity limits energy production, compromising stress response mechanisms and growth recovery.
Why Test Candidates on This?
Commonly tested in plant stress physiology to assess understanding of pigment dynamics and visual stress indicators.
Required skill level: Mid