Abiotic Stress Research Glossary
564 terms total — 24 showing — Last updated 27 Oct 2026
Metabolic quiescence
A dormant state in which organisms drastically reduce metabolic activity and energy consumption to survive prolonged abiotic stress. This reversible condition allows survival during unfavorable environmental periods with minimal resource depletion.
Photosynthetic efficiency
The capacity of the photosynthetic apparatus to convert absorbed light energy into chemical energy (glucose) under given...
Photosynthetic efficiency decline
The reduction in the quantum yield and carbon assimilation rate of photosynthesis under abiotic stress conditions, resul...
Photosynthetic efficiency reduction
The decline in the quantum yield of photosystem II and overall carbon fixation rate under abiotic stress conditions. Thi...
Photosynthetic efficiency under stress
The ratio of light energy actually converted into chemical energy (photosynthetic products) relative to incident light a...
Photosynthetic Electron Transport Chain Disruption
The impairment of light-dependent electron transfer reactions through photosystems II and I, typically caused by excessi...
photosynthetic electron transport disruption
The impairment of electron flow through photosystem II and the electron transport chain during abiotic stress, resulting...
Photosynthetic Electron Transport Rate
The rate of electron movement through photosystem complexes (PSII to PSI) during the light reactions, measurable via chl...
Photosynthetic Light-Use Efficiency
The ratio of photosynthetic carbon fixation to absorbed photon flux density, indicating how effectively plants convert l...
Photosynthetic Limitation
The reduction in photosynthetic capacity caused by non-stomatal factors such as enzyme deactivation, chlorophyll degrada...
Photosynthetic Limitation Under Stress
The reduction in photosynthetic rate and efficiency caused by stress-induced impairment of light capture, electron trans...
Photosynthetic Nitrogen-Use Efficiency
The ratio of photosynthetic carbon assimilation rate to total leaf nitrogen content, quantifying how effectively nitroge...
Photosynthetic photon flux density (PPFD)
The measurement of photosynthetically active radiation (PAR) quantified as the number of photons hitting a surface per u...
Photosynthetic quantum yield
The efficiency of photosystem II at converting absorbed photons into separated electron-hole pairs, expressed as the rat...
Photosynthetic Quantum Yield Depression
The reduction in the efficiency of light energy conversion to chemical energy (measured as Fv/Fm ratio or electron trans...
Photosynthetic rate
The amount of carbon dioxide fixed or oxygen produced per unit time, measured as the net or gross carbon assimilation in...
Photosynthetic Rate Decline
A measurable reduction in the efficiency of photosynthetic carbon fixation under abiotic stress conditions, reflecting d...
Photosynthetic recovery kinetics
The temporal dynamics of photosynthetic rate restoration following the cessation or reduction of abiotic stress exposure...
photosystem II efficiency
A measure of how effectively photosystem II converts absorbed light energy into chemical energy during photosynthesis.
Photothermal stress interaction
The combined effect of simultaneously elevated light intensity and temperature on plant physiology, resulting in compoun...
Phytochrome-mediated light perception
The sensory mechanism by which plants detect light quality, duration, and intensity through the photoreceptor protein ph...
Phytochrome-mediated stress signaling
The red/far-red light-dependent sensing and signaling pathway through which plants perceive light quality changes and mo...
Phytohormone Cross-Talk
The antagonistic or synergistic interactions between plant hormones (abscisic acid, ethylene, jasmonic acid, salicylic a...
Phytohormone signaling cascade
The series of molecular events initiated by hormone-receptor binding that triggers gene expression and physiological res...
Phytotoxic accumulation syndrome
The pathological condition resulting from excessive buildup of potentially toxic compounds or elements within plant tiss...