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2014 | 36 | 12 |

Tytuł artykułu

Photosynthetic refixing of CO2 is responsible for the apparent disparity between mitochondrial respiration in the light and in the dark

Autorzy

Warianty tytułu

Języki publikacji

EN

Abstrakty

EN
The net photosynthetic rate (PN), the sample room CO₂ concentration (CO₂S) and the intercellular CO₂ concentration (Ci) in response to PAR, of C3 (wheat and bean) and C4 (maize and three-colored amaranth) plants were measured. Results showed that photorespiration (Rp) of wheat and bean could not occur at 2 % O₂. At 2 % O₂ and 0 µmol mol-1 CO₂, PN can be used to estimate the rate of mitochondrial respiration in the light (Rd). The Rd decreased with increasing PAR, and ranged between 3.20 and 2.09 µmol CO₂ m⁻² s⁻¹ in wheat. The trend was similar for bean (between 2.95 and 1.70 µmol CO₂ m⁻² s⁻¹), maize (between 2.27 and 0.62 µmol CO₂ m⁻² s⁻¹) and three-colored amaranth (between 1.37 and 0.49 µmol CO₂ m⁻² s⁻¹). The widely observed phenomenon of Rd being lower than Rn can be attributed to refixation, rather than light inhibition. For all plants tested, CO₂ recovery rates increased with increasing light intensity from 32 to 55 % (wheat), 29 to 59 % (bean), 54 to 87 % (maize) and 72 to 90 % (three-colored amaranth) at 50 and 2,000 µmol m⁻² s⁻¹, respectively.

Słowa kluczowe

Wydawca

-

Rocznik

Tom

36

Numer

12

Opis fizyczny

p.3157-3162,fig.,ref.

Twórcy

autor
  • Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, 100101, People’s Republic of China
  • Yucheng Comprehensive Experiment Station China Academy of Science, Beijing, 100101, People’s Republic of China
  • Graduates University of Chinese Academy of Sciences, Beijing, 100101, People’s Republic of China
  • Wenzhou Vocational and Technical College, Wenzhou, 325026, People’s Republic of China
autor
  • Wenzhou Vocational and Technical College, Wenzhou, 325026, People’s Republic of China
autor
  • College of Life and Environmental Science, Wenzhou University, Wenzhou, 325035, People’s Republic of China
autor
  • Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, 100101, People’s Republic of China
  • Yucheng Comprehensive Experiment Station China Academy of Science, Beijing, 100101, People’s Republic of China
  • Graduates University of Chinese Academy of Sciences, Beijing, 100101, People’s Republic of China

Bibliografia

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Typ dokumentu

Bibliografia

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