A decline in nitrogen availability affects plant responses to ozone

Douglas G. Bielenberg, Jonathan Paul Lynch, Eva J. Pell

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

The effects are presented here of a decline in nitrogen (N) availability on ozone (O3)-induced accelerated foliar senescence during the growing season in a hybrid poplar. Cuttings of Populus trichocarpa x maximowizii were grown in sand culture where N supply to the plant could be controlled on a daily basis and reduced in half of the plants when desired. All plants received charcoal-filtered air; half also received supplemental O3. Ozone and N withdrawal both reduced plant growth. Plants grown in both N treatments displayed leaf senescence and abscission in response to O3, but leaf abscission in the N-withdrawal treatment was approximately double that of the constant-N treatment. Ozone had differential effects on light-saturated net photosynthesis (Asat) and total soluble protein in the younger and older foliage depending on N treatment. A decline in N availability increased the rate of O3-induced accelerated senescence and was associated with plant size and possibly continued active growth. Compensatory responses of young leaves to O3 exposure only occured when N availability to the plant declined and O3-induced accelerated senescence was most severe.

Original languageEnglish (US)
Pages (from-to)413-425
Number of pages13
JournalNew Phytologist
Volume151
Issue number2
DOIs
StatePublished - Aug 20 2001

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Ozone
ozone
plant response
Nitrogen
nitrogen
leaves
Populus balsamifera subsp. trichocarpa
leaf abscission
Populus
abscission
charcoal
Charcoal
Photosynthesis
Growth
growing season
plant growth
photosynthesis
sand
Air
air

All Science Journal Classification (ASJC) codes

  • Physiology
  • Plant Science

Cite this

Bielenberg, Douglas G. ; Lynch, Jonathan Paul ; Pell, Eva J. / A decline in nitrogen availability affects plant responses to ozone. In: New Phytologist. 2001 ; Vol. 151, No. 2. pp. 413-425.
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A decline in nitrogen availability affects plant responses to ozone. / Bielenberg, Douglas G.; Lynch, Jonathan Paul; Pell, Eva J.

In: New Phytologist, Vol. 151, No. 2, 20.08.2001, p. 413-425.

Research output: Contribution to journalArticle

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