The response of isoprene emission rate and photosynthetic rate to photon flux and nitrogen supply in aspen and white oak trees

M. E. Litvak, F. Loreto, P. C. Harley, T. D. Sharkey, Russell Monson

Research output: Contribution to journalArticle

70 Citations (Scopus)

Abstract

Isoprene is the primary biogenic hydrocarbon emitted from temperate deciduous forest ecosystems. The effects of varying photon flux density (PFD) and nitrogen growth regimes on rates of isoprene emission and net photosynthesis in potted aspen and white oak trees are reported. In both aspen and oak trees, whether rates were expressed on a leaf area or dry mass basis, (1) growth at higher PFD resulted in significantly higher rates of isoprene emission, than growth at lower PFD, (2) there is a significant positive relationship between isoprene emission rate and leaf nitrogen concentration in both sun and shade trees, and (3) there is a significant positive correlation between isoprene emission rate and photosynthetic rate in both sun and shade trees. The greater capacity for isoprene emission in sun leaves was due to both higher leaf mass per unit area and differences in the biochemical and/or physiological properties that influence isoprene emission. Positive correlations between isoprene emission rate and leaf nitrogen concentration support the existence of mechanisms that link leaf nitrogen status to isoprene synthase activity. Positive correlations between isoprene emission rate and photosynthesis rate support previous hypotheses that isoprene emission plays a role in protecting photosynthetic mechanisms during stress.

Original languageEnglish (US)
Pages (from-to)549-559
Number of pages11
JournalPlant, Cell and Environment
Volume19
Issue number5
StatePublished - 1996
Externally publishedYes

Fingerprint

Quercus
Quercus alba
Photons
Nitrogen
nitrogen
Solar System
shade trees
Photosynthesis
leaves
Growth
isoprene
photons
photosynthesis
Hydrocarbons
temperate forests
deciduous forests
Ecosystem
forest ecosystems
hydrocarbons
leaf area

Keywords

  • Biogenic hydrocarbon emission
  • Isoprene
  • Nitrogen
  • Photon flux
  • Populus
  • Quercus

ASJC Scopus subject areas

  • Plant Science

Cite this

The response of isoprene emission rate and photosynthetic rate to photon flux and nitrogen supply in aspen and white oak trees. / Litvak, M. E.; Loreto, F.; Harley, P. C.; Sharkey, T. D.; Monson, Russell.

In: Plant, Cell and Environment, Vol. 19, No. 5, 1996, p. 549-559.

Research output: Contribution to journalArticle

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AU - Harley, P. C.

AU - Sharkey, T. D.

AU - Monson, Russell

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