New PDF release: A student's atlas of flowering plants : some dicotyledons of

By planned and prepared under the direction of Carroll E. Wood, Jr., assisted by Elizabeth A. Shaw ; with the technical help of Karen S. Velmure and Kenneth R. Robertson.

ISBN-10: 0060472073

ISBN-13: 9780060472078

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Extra info for A student's atlas of flowering plants : some dicotyledons of eastern North America

Example text

There is a minimum requirement of four electrons per carboxylation or oxygenation reac tion. Hence, the minimum electron transport rate (J) required for particular rates of carboxylation and oxygenation is J ¼ 4ðVc þ Vo Þ (6) At light saturation, J is limited by the capacity of electron transport and is called Jmax. Using Equations (5) and (6), the rate of carbox ylation can then be expressed as Vc ¼ J=f4ð1 þ 2ÀÃ =Cc Þg (7) The CO2 limited and RuBP saturated rate of photosynthesis (Ac) can then be calculated using Equations (1), (3), and (5) as Vcmax ðCc ÀÃ Þ Ac ¼ Cc þ Km Rday (8) The RuBP limited rate of photosynthesis (Aj) can be calculated using Equations (1), (5), and (7) as Aj ¼ JðCc ÀÃ Þ 4ðCc þ 2ÀÃ Þ Rday (9) The minimum of Equations (8) and (9) describes the full CO2 response curve as shown in Fig.

Two types of measurements are commonly employed for the estimation of Cc, which is subse quently used to calculate gm.

This can occur under conditions of excessive light, severely limiting CO2 supply, or stresses that inhibit photochemistry. The primary photochemical reactions of PS II and PS I occur at a much faster rate than subsequent electron transport (Sect. 3), which in turn occurs faster than carbon reduction processes (Sect. 4). Since the three compartments of the photosynthetic apparatus operate in series, they are each tightly regulated to coordinate their activity under chan ging conditions. 3 Membrane-Bound Photosynthetic Electron Transport and Bioenergetics The excitation energy captured by the pigments is transferred to the reaction centers of PS I and PS II.

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A student's atlas of flowering plants : some dicotyledons of eastern North America by planned and prepared under the direction of Carroll E. Wood, Jr., assisted by Elizabeth A. Shaw ; with the technical help of Karen S. Velmure and Kenneth R. Robertson.


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