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Metabolic response to elevated CO

Brígida Fernández de Simón1, Estrella Cadahía1, Ismael Aranda2

  • 1Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria, O.A., M.P. (INIA), Centro de Investigación Forestal, Carretera de La Coruña Km 7.5, 28040 Madrid, Spain.

Plant Physiology and Biochemistry : PPB
|September 15, 2018
PubMed
Summary
This summary is machine-generated.

Elevated atmospheric carbon dioxide (CO2) impacts pine needle metabolism differently based on genotype and needle age. Juvenile needles show greater metabolic shifts under enriched CO2, highlighting genotype-specific adaptation strategies.

Keywords:
Elevated [CO(2)]GenotypeHeteroblastyMetabolomeNeedlePinus pinaster

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Area of Science:

  • Plant physiology and metabolomics
  • Climate change biology
  • Forest ecology

Background:

  • Global climate change is characterized by rising atmospheric CO2 levels.
  • Trees, as significant carbon sinks, are allocating more carbon to sink tissues.
  • Understanding metabolic responses to elevated CO2 is crucial for predicting forest adaptation.

Purpose of the Study:

  • To investigate genotype-dependent metabolic responses in *Pinus pinaster* needles under elevated CO2.
  • To determine if metabolic responses to elevated CO2 vary with needle ontogeny (juvenile vs. adult).
  • To elucidate the role of heteroblasty in CO2-induced metabolic plasticity.

Main Methods:

  • Metabolomics analysis of *Pinus pinaster* needles from four genotypes.
  • Exposure to two CO2 levels: ambient (400 μmol/mol) and enriched (800 μmol/mol).
  • Comparison of metabolic profiles between adult and juvenile needles.

Main Results:

  • Elevated CO2 significantly altered needle metabolomes, particularly in secondary metabolism pathways.
  • Juvenile needles exhibited more pronounced metabolic changes under elevated CO2 than adult needles.
  • Metabolic responses to elevated CO2 were both common across genotypes and genotype-specific, with flavonols being largely genotype-independent, while terpenoids and fatty acids were genotype-dependent.
  • Interdependence between adult and juvenile needle metabolomes was observed.

Conclusions:

  • Needle ontogeny and genotype significantly influence metabolic plasticity in response to elevated CO2 in *Pinus pinaster*.
  • Understanding genotype-specific responses is essential for predicting tree adaptation mechanisms to climate change.
  • The findings contribute to explaining varied effects of elevated CO2 on conifer carbon metabolism.