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PHOTOSYNTHETIC ACCLIMATION TO SUB-AMBIENT CO2 (20 PA) IN THE C3 ANNUAL PHASEOLUS-VULGARIS L

SAGE, RF ; REID, CD

Photosynthetica, 1992, Vol.27 (4), p.605-617 [Periódico revisado por pares]

PRAGUE 6: INST EXPERIMENTAL BOTANY, ACAD SCI CZECH REPUBLIC

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  • Título:
    PHOTOSYNTHETIC ACCLIMATION TO SUB-AMBIENT CO2 (20 PA) IN THE C3 ANNUAL PHASEOLUS-VULGARIS L
  • Autor: SAGE, RF ; REID, CD
  • Assuntos: Agronomy. Soil science and plant productions ; Biological and medical sciences ; Fundamental and applied biological sciences. Psychology ; Life Sciences & Biomedicine ; Metabolism ; Photosynthesis, respiration. Anabolism, catabolism ; Plant physiology and development ; Plant Sciences ; Science & Technology
  • É parte de: Photosynthetica, 1992, Vol.27 (4), p.605-617
  • Descrição: Plants of Phaseolus vulgaris L. cv. Linden were grown at the current (35 Pa) or the sub-ambient (20 Pa) partial pressures of CO2 at 29 +/- 3-degrees-C in order to analyze the photosynthetic acclimation to low ambient CO2. No difference was observed in the CO2 response of net photosynthetic rate (P(N)) or leaf conductance (g(l)) below the CO2 partial pressure measurement of 35 Pa. Above 35 Pa, P(N) was depressed in plants grown at 20 Pa CO2 when compared to those grown at 35 Pa CO2. In both treatments, P(N) became insensitive to increasing CO2 above an intercellular partial pressure of 50 Pa, indicating that the capacity of starch and sucrose synthesis to metabolize triose phosphates limited P(N) at high measurement CO2. No differences were observed in the ribulose-1,5-bisphosphate carboxylase content, activity, or activation state in plants grown at either CO2 Partial pressure. Chlorophyll contents were also equivalent between the treatments. Hence, little modulation of enzyme or pigment level follows atmospheric CO2 depletion, with the possible exception that the capacity of starch and sucrose synthesis may be reduced in plants grown at low CO2.
  • Editor: PRAGUE 6: INST EXPERIMENTAL BOTANY, ACAD SCI CZECH REPUBLIC
  • Idioma: Inglês
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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