Uncovering hidden genetic variation in photosynthesis of field-grown maize under ozone pollution

Nicole E. Choquette, Funda Ogut, Timothy M. Wertin, Christopher M. Montes, Crystal A. Sorgini, Alison M. Morse, Patrick J. Brown, Andrew D. B. Leakey, Lauren M. Mcintyre, Elizabeth A. Ainsworth

Research output: Contribution to journalArticle

Abstract

Ozone is the most damaging air pollutant to crops, currently reducing Midwest US maize production by up to 10%, yet there has been very little effort to adapt germplasm for ozone tolerance. Ozone enters plants through stomata, reacts to form reactive oxygen species in the apoplast and ultimately decreases photosynthetic C gain. In this study, 10 diverse inbred parents were crossed in a half-diallel design to create 45 F1 hybrids, which were tested for ozone response in the field using free air concentration enrichment (FACE). Ozone stress increased the heritability of photosynthetic traits and altered genetic correlations among traits. Hybrids from parents Hp301 and NC338 showed greater sensitivity to ozone stress, and disrupted relationships among photosynthetic traits. The physiological responses underlying sensitivity to ozone differed in hybrids from the two parents, suggesting multiple mechanisms of response to oxidative stress. FACE technology was essential to this evaluation because genetic variation in photosynthesis under elevated ozone was not predictable based on performance at ambient ozone. These findings suggest that selection under elevated ozone is needed to identify deleterious alleles in the world's largest commodity crop.

Original languageEnglish (US)
Pages (from-to)4327-4338
JournalGlobal change biology
Volume25
Issue number12
DOIs
StatePublished - Oct 1 2019

Fingerprint

Photosynthesis
Ozone
genetic variation
photosynthesis
Pollution
maize
ozone
pollution
Crops
Air Pollutants
crop
Oxidative stress
stomata
germplasm
air
physiological response
heritability
Air
commodity
Reactive Oxygen Species

Keywords

  • air pollution
  • FACE
  • global climate change
  • heritability
  • maize
  • ozone (O3)
  • Photosynthesis

ASJC Scopus subject areas

  • Global and Planetary Change
  • Environmental Chemistry
  • Ecology
  • Environmental Science(all)

Cite this

Choquette, N. E., Ogut, F., Wertin, T. M., Montes, C. M., Sorgini, C. A., Morse, A. M., ... Ainsworth, E. A. (2019). Uncovering hidden genetic variation in photosynthesis of field-grown maize under ozone pollution. Global change biology, 25(12), 4327-4338. https://doi.org/10.1111/gcb.14794

Uncovering hidden genetic variation in photosynthesis of field-grown maize under ozone pollution. / Choquette, Nicole E.; Ogut, Funda; Wertin, Timothy M.; Montes, Christopher M.; Sorgini, Crystal A.; Morse, Alison M.; Brown, Patrick J.; Leakey, Andrew D. B.; Mcintyre, Lauren M.; Ainsworth, Elizabeth A.

In: Global change biology, Vol. 25, No. 12, 01.10.2019, p. 4327-4338.

Research output: Contribution to journalArticle

Choquette, NE, Ogut, F, Wertin, TM, Montes, CM, Sorgini, CA, Morse, AM, Brown, PJ, Leakey, ADB, Mcintyre, LM & Ainsworth, EA 2019, 'Uncovering hidden genetic variation in photosynthesis of field-grown maize under ozone pollution', Global change biology, vol. 25, no. 12, pp. 4327-4338. https://doi.org/10.1111/gcb.14794
Choquette NE, Ogut F, Wertin TM, Montes CM, Sorgini CA, Morse AM et al. Uncovering hidden genetic variation in photosynthesis of field-grown maize under ozone pollution. Global change biology. 2019 Oct 1;25(12):4327-4338. https://doi.org/10.1111/gcb.14794
Choquette, Nicole E. ; Ogut, Funda ; Wertin, Timothy M. ; Montes, Christopher M. ; Sorgini, Crystal A. ; Morse, Alison M. ; Brown, Patrick J. ; Leakey, Andrew D. B. ; Mcintyre, Lauren M. ; Ainsworth, Elizabeth A. / Uncovering hidden genetic variation in photosynthesis of field-grown maize under ozone pollution. In: Global change biology. 2019 ; Vol. 25, No. 12. pp. 4327-4338.
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