Biochemistry of C3–C4 Intermediates

Edwards, Gerald E.; Ku, Maurice S. B.

doi:10.1016/b978-0-12-675410-0.50011-7

Cited by 123 publications

(201 citation statements)

References 69 publications

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“…This genus is unique, because it contains C3 and C4 plants and a large number of G-C4 intermediate species [15,16]. Here we report the primary structure of the leaf-specific PPDK of the C4 plant Flaveria trinervia and its expression characteristics.…”

Section: Rntroductronmentioning

confidence: 98%

Primary structure of pyruvate, orthophosphate dikinase in the dicotyledonous C₄ plant Flaveria trinervia

Rosche

Westhoff

1990

FEBS Letters

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We have isolated and characterized cDNA clones encoding the entire precursor for the leafspecific isoform of pyruvate, orthophosphate dikinase (PPDK) from the dicotyledonous C, plant Flaveria frinervia. The deduced amino acid sequence reveals a high degree of similarity to the corresponding maize protein indicating a common evolutionary basis. However, no significant similarities are apparent upon comparison of the putative transit peptides. The implications of this divergence are discussed with respect to the evolution of PPDK genes.

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Section: Rntroductronmentioning

confidence: 98%

Primary structure of pyruvate, orthophosphate dikinase in the dicotyledonous C₄ plant Flaveria trinervia

Rosche

Westhoff

1990

FEBS Letters

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“…However, the extent to which this shortterm C4-like fixation is integrated into photosynthetic C02 assimilation of C3-C4 Flaveria species remains to be determined since long-term measurements of carbon isotope discrimination (determined using leaf dry matter) of these plants give C3-like values (Edwards and Ku, 1987;Monson eta/., 1988).…”

Section: Fla Veriamentioning

confidence: 99%

“…Towards the biochemical mechanism Early work on Mollugo vei-ficillata also suggested that limited C4 metabolism operated in this species (Sayre and Kennedy, 1977;Sayre eta/., 1979), although more recent critical assessment of the data (Edwards and Ku, 1987;Hylton eta/., 1988) suggest that this is unlikely to account for the low r of this species.…”

Section: C3-c4 Intermediate Photosynthesis 269mentioning

confidence: 99%

“…This inhibition is due in part to direct competition between O2 and C02, and in part to increasing C02 release through photorespiration as oxygenation increases. The rate at 21 YO O2 is typically 65-70% of that at 2% O2 for C3 species (Ku and Edwards, 1978) and 7 5 8 0 % of that at 2% O2 for a range of C3-C4 species (Edwards and Ku, 1987). The high concentration of C02 in the bundle sheath cells of C4 species renders them almost completely insensitive to oxygen inhibition.…”

Section: Leaf Gas Exchange In C3-c4 Intermediate Speciesmentioning

confidence: 99%

“…Numerous mitochondria, the peroxisomes and many of the chloroplasts are located centripetally in the bundle sheath cells (Edwards and Ku, 1987). The mitochondria are found along the cell wall adjacent to the vascular tissue and are overlain by the chloroplasts (Figure 1).…”

Section: Leaf Anatomy Of C3-c4 Intermediate Speciesmentioning

confidence: 99%

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C₃–C₄ intermediate photosynthesis: linking physiology to gene expression

Rawsthorne¹

1992

The Plant Journal

125

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PHOTOSYNTHETIC CHARACTERISTICS OF C₃‐C₄ INTERMEDIATE FLAVERIA FLORIDANA (ASTERACEAE) IN NATURAL HABITATS: EVIDENCE OF ADVANTAGES TO C₃‐C₄ PHOTOSYNTHESIS AT HIGH LEAF TEMPERATURES

Monson

Jaeger

1991

American J of Botany

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Measurements of leaf gas exchange were conducted in situ for the C3‐C4 intermediate plant Flaveria floridana. Leaves exhibited measurable CO2 assimilation at atmospheric CO2 concentrations as low as 20 μmol/mol. This result demonstrates that the low CO2 compensation points observed in past studies of greenhouse‐grown C3‐C4 intermediate plants also exist in plants growing in their natural habitat. Photosynthesis rates in F. floridana were near their maximum at intercellular CO2 concentrations as low as 112 μmol/mol. The existence of near‐maximum photosynthesis rates at such low intercellular CO2 concentrations is interpreted as evidence for the existence of a CO2‐concentrating mechanism in F. floridana. Such a mechanism would also explain the observed lack of response in photosynthesis rates to reductions in stomatal conductance and intercellular CO2 concentration as the leaf‐to‐air water vapor concentration gradient is increased. Photosynthetic rates were relatively high at leaf temperatures between 35 and 40 C, compared to most C3 plants. At midday during May, when leaf temperatures were between 35 and 42 C, F. floridana leaves exhibited photosynthesis rates that were four times higher than a sympatric C3 species (Eustoma exaltatum) of similar growth form and ecological habit. The high photosynthesis rates at high leaf temperatures in F. floridana were not due to higher leaf nitrogen contents, but rather to its reduced rate of photorespiration. These results confirm that C3‐C4 intermediate photosynthesis can provide plants with an advantage at high leaf temperatures, compared to C3 plants.

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Biochemistry of C3–C4 Intermediates

Cited by 123 publications

References 69 publications

Primary structure of pyruvate, orthophosphate dikinase in the dicotyledonous C₄ plant Flaveria trinervia

Primary structure of pyruvate, orthophosphate dikinase in the dicotyledonous C₄ plant Flaveria trinervia

C₃–C₄ intermediate photosynthesis: linking physiology to gene expression

PHOTOSYNTHETIC CHARACTERISTICS OF C₃‐C₄ INTERMEDIATE FLAVERIA FLORIDANA (ASTERACEAE) IN NATURAL HABITATS: EVIDENCE OF ADVANTAGES TO C₃‐C₄ PHOTOSYNTHESIS AT HIGH LEAF TEMPERATURES

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Biochemistry of C3–C4 Intermediates

Cited by 123 publications

References 69 publications

Primary structure of pyruvate, orthophosphate dikinase in the dicotyledonous C4 plant Flaveria trinervia

Primary structure of pyruvate, orthophosphate dikinase in the dicotyledonous C4 plant Flaveria trinervia

C3–C4 intermediate photosynthesis: linking physiology to gene expression

PHOTOSYNTHETIC CHARACTERISTICS OF C3‐C4 INTERMEDIATE FLAVERIA FLORIDANA (ASTERACEAE) IN NATURAL HABITATS: EVIDENCE OF ADVANTAGES TO C3‐C4 PHOTOSYNTHESIS AT HIGH LEAF TEMPERATURES

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Primary structure of pyruvate, orthophosphate dikinase in the dicotyledonous C₄ plant Flaveria trinervia

Primary structure of pyruvate, orthophosphate dikinase in the dicotyledonous C₄ plant Flaveria trinervia

C₃–C₄ intermediate photosynthesis: linking physiology to gene expression

PHOTOSYNTHETIC CHARACTERISTICS OF C₃‐C₄ INTERMEDIATE FLAVERIA FLORIDANA (ASTERACEAE) IN NATURAL HABITATS: EVIDENCE OF ADVANTAGES TO C₃‐C₄ PHOTOSYNTHESIS AT HIGH LEAF TEMPERATURES