Affordable Access

Publisher Website

Enhanced sensitivity to higher ozone in a pathogen-resistant tobacco cultivar

Journal of Experimental Botany
Oxford University Press
Publication Date
DOI: 10.1093/jxb/err361
  • Research Papers
  • Biology


Investigations of the effects of elevated ozone (O3) on the virus–plant system were conducted to inform virus pathogen management strategies better. One susceptible cultivar of tobacco (Nicotiana tabacum L. cv. Yongding) and a resistant cultivar (Nicotiana tabacum L. cv. Vam) to Potato virus Y petiole necrosis strain (PVYN) infection were grown in open-top chambers under ambient and elevated O3 concentrations. Above-ground biomass, foliage chlorophyll, nitrogen and total non-structural carbohydrate (TNCs), soluble protein, total amino acid (TAA) and nicotine content, and peroxidase (POD) activity were measured to estimate the effects of elevated O3 on the impact of PVYN in the two cultivars. Results showed that under ambient O3, the resistant cultivar possessed greater biomass and a lower C/N ratio after infection than the susceptible cultivar; however, under elevated O3, the resistant cultivar lost its biomass advantage but maintained a lower C/N ratio. Variation of foliar POD activity could be explained as a resistance cost which was significantly correlated with biomass and C/N ratio of the tobacco cultivar. Chlorophyll content remained steady in the resistant cultivar but decreased significantly in the susceptible cultivar when stressors were applied. Foliar soluble protein and free amino acid content, which were related to resistance cost changes, are also discussed. This study indicated that a virus-resistant tobacco cultivar showed increased sensitivity to elevated O3 compared to a virus-sensitive cultivar.

There are no comments yet on this publication. Be the first to share your thoughts.


Seen <100 times

More articles like this

Differences in morpho-anatomical structure of ozon...

on Acta biologica Hungarica March 2010

Ozone uptake and its effect on photosynthetic para...

on Plant Physiology and Biochemis... Jan 01, 2002

Physiological characteristics of tobacco cultivars...

on Environmental and Experimental... Jan 01, 1997

Petunia cultivar sensitivity to ozone and sulphur...

on Scientia Horticulturae Jan 01, 1979
More articles like this..