Compensation Point


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compensation point

[‚käm·pən′sā·shən ‚pȯint]
(botany)
The light intensity at which the amount of carbon dioxide released in respiration equals the amount used in photosynthesis, and the amount of oxygen released in photosynthesis equals the amount used in respiration.

Compensation Point

 

in plants, a physiological indicator of the light intensity at which a leafs absorption of CO2 during photosynthesis balances its production of CO2 during respiration. The compensation point of sciophilous plants is significantly lower than that of photophilic plants. Sometimes the term “compensation point” refers to the combination of the general conditions of light and temperature as a result of which the plant’s formation and consumption of organic matter are balanced over a 24-hour period.

References in periodicals archive ?
The CPET variables analyzed were oxygen uptake expressed in L/min ([VO.sub.2]), in percentage of predicted, or in metabolic equivalents (METs) at peak effort, anaerobic threshold (AT), and the respiratory compensation point (RCP) when achieved, Dioxide Carbon output in L/min ([VCO.sub.2]) and minute ventilation in L/min (VE).
Light saturation point ([L.sub.sp]), light compensation point ([L.sub.cp]), dark respiration ([R.sub.d]), initial slope (IS), stomatal conductance ([g.sub.s]) and transpiration rate (E) at [A.sub.max] are in Table 1.
Is lactic acidosis a cause of exercise induced hyperventilation at the respiratory compensation point? Br J Sports Med 2004; 38: 622-625.
The relationships among critical power determined from a 3-min all-out test, respiratory compensation point, gas exchange threshold, and ventilatory threshold.
Estimation of the exercise ventilatory compensation point by the analysis of the relationship between minute ventilation and heart rate.
The Apparent Quantum Efficiency (AQE), Light Saturation Point (Psat), Light Compensation Point (Pcom), Respiration (Rd) and Maximum C[O.sub.2] Assimilation (Amax) (Table 1) were affected in different ways by water deficit comparing both cultivars.
X-value is the corresponding first compensation point.
light saturation point (QA), and light compensation point ([Q.sub.O])
For calculation of light compensation point ([I.sub.com]), we used computer software attached to the data logger, and the inverse quadratic equation for unit surface area, as described by Ben-Zion and Dubinsky (1988).
Three specific parameters (light compensation point, light saturation point, and maximum Pn) for each treatment are presented in Table 4.
Consequently, photosynthetic rates, light saturation point, light compensation point, respiration, conductance, and transpiration were expected to be low when compared to sun adapted plants.
There were no significant differences between sun and shade leaves for the light compensation point, transpiration rates, leaf water potential, leaf mass or leaf area.

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