Photosynthetic gas exchange under emersed conditions in eulittoral and normally submersed members of the Fucales and the Laminariales: interpretation in relation to C isotope ratio and N and water use efficiency

@article{Surif1990PhotosyntheticGE,
  title={Photosynthetic gas exchange under emersed conditions in eulittoral and normally submersed members of the Fucales and the Laminariales: interpretation in relation to C isotope ratio and N and water use efficiency},
  author={Misni B. Surif and John A Raven},
  journal={Oecologia},
  year={1990},
  volume={82},
  pages={68-80}
}
Ten species of brown macroalgae (five eulittoral and one submersed species of the Fucales; four submersed species of the Laminariales) from a rocky shore at Arbroath, Scotland, were examined for characteristics of emersed photosynthesis in relation to the partial pressure of CO2 and O2. The five eulittoral species of the Fucaceae were approaching CO2 saturation for light-saturated photosynthesis at normal air levels of CO2 (35 Pa) in 21 kPa O2. The normally submersed algae are further from CO2… CONTINUE READING

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Work with added extracellular carbonic anhydrase ( CA ) , and with a relatively membrane - impermeant inhibitor of the native extracellular CA activity ( acetazolamide ) , suggests that , in emersed conditions as well as in the previously reported work on algae submersed in seawater at pH 8 , HCO inf3 sup− is the major inorganic C species entering the cell .
Ten species of brown macroalgae ( five eulittoral and one submersed species of the Fucales ; four submersed species of the Laminariales ) from a rocky shore at Arbroath , Scotland , were examined for characteristics of emersed photosynthesis in relation to the partial pressure of CO2 and O2 .
CO2 compensation partial pressures are low ( < 0.5 Pa ) for the Fucaceae and independent of O2 in the range 2–42 kPa .
The five eulittoral species of the Fucaceae were approaching CO2 saturation for light - saturated photosynthesis at normal air levels of CO2 ( 35 Pa ) in 21 kPa O2 .
For the other five algae , the CO2 compensation partial pressure are higher , and increased with O2 partial pressure in the range 2–42 kPa .
The rate of net photosynthesis in the Fucaceae is O2-independent in the range 2–21 kPa O2 over the entire range of CO2 partial pressure tested ( compensation up to 95 Pa ) .
The five eulittoral species of the Fucaceae were approaching CO2 saturation for light - saturated photosynthesis at normal air levels of CO2 ( 35 Pa ) in 21 kPa O2 .
For the other five algae tested , net photosynthesis is slightly inhibited by O2 at 21 kPa relative to 2 kPa over the entire range of CO2 partial pressures tested ( compensation up to 95 Pa ) .
For the other five algae , the CO2 compensation partial pressure are higher , and increased with O2 partial pressure in the range 2–42 kPa .
The rate of net photosynthesis in the Fucaceae is O2-independent in the range 2–21 kPa O2 over the entire range of CO2 partial pressure tested ( compensation up to 95 Pa ) .
The five eulittoral species of the Fucaceae were approaching CO2 saturation for light - saturated photosynthesis at normal air levels of CO2 ( 35 Pa ) in 21 kPa O2 .
The five eulittoral species of the Fucaceae were approaching CO2 saturation for light - saturated photosynthesis at normal air levels of CO2 ( 35 Pa ) in 21 kPa O2 .
CO2 compensation partial pressures are low ( < 0.5 Pa ) for the Fucaceae and independent of O2 in the range 2–42 kPa .
Ten species of brown macroalgae ( five eulittoral and one submersed species of the Fucales ; four submersed species of the Laminariales ) from a rocky shore at Arbroath , Scotland , were examined for characteristics of emersed photosynthesis in relation to the partial pressure of CO2 and O2 .
For the other five algae tested , net photosynthesis is slightly inhibited by O2 at 21 kPa relative to 2 kPa over the entire range of CO2 partial pressures tested ( compensation up to 95 Pa ) .
Work with added extracellular carbonic anhydrase ( CA ) , and with a relatively membrane - impermeant inhibitor of the native extracellular CA activity ( acetazolamide ) , suggests that , in emersed conditions as well as in the previously reported work on algae submersed in seawater at pH 8 , HCO inf3 sup− is the major inorganic C species entering the cell .
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