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Biologic Markers of Air-Pollution Stress and Damage in Forests (1989) / Chapter Skim
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Foliar Nitrate Reductase: a Marker for Assimilation of Atmospheric Nitrogen Oxides
Pages 247-250

The Chapter Skim interface presents what we've algorithmically identified as the most significant single chunk of text within every page in the chapter.
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From page 247...
... (1987) , who exposed Scots pine seedlings with 85 ppb NO2 and detected a large increase in foliar NR activity after 1 day, with maximum activity after 2-4 days of exposure.
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From page 248...
... Whether pollutant NOX gases cause a detectable increase in foliar NR at realistic concentrations and under field conditions remains a key research question. The literature on NR suggests that it is unlikely that a simple measurement of NR activity in the foliage of a tree, or even a more extensive monitoring of changes in foliar NR of a tree during the season or during a suspected pollution episode, will provide an unambiguous marker that the tree is impacted by nitrogen oxides.
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From page 249...
... In G.D. Hertell, chairman, Effects of Atmospheric Pollutants on the Spruce-Fir Forests of the Eastern United States and Federal Republic of Germany.
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From page 250...
... In G.D. Hertell, chairman, Effects of Atmospheric Pollutants on the Spruce-Fir Forests of the Eastern United States and Federal Republic of Germany.
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Key Terms

  • nitrate reductase
  • nitrogen oxides
  • spruce seedlings
  • biological marker
  • spruce trees

  • extensive monitoring
  • spruce needles
  • samples collected
  • noninduced needles
  • growing season

  • unambiguous marker
  • scots pine
  • elevation site
  • seedlings exposed
  • research question

  • gaseous nitrogen
  • smoky mountains
  • nitrite reductase
  • needles ranged
  • dropped quickly

  • indeed induced
  • detectable increase
  • federal republic
  • key research
  • winter damage

  • field conditions
  • primary roots
  • greatly exceeds
  • enzyme involved
  • interactive effects


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