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- Title
Screening of Bangladeshi winter wheat ( Triticum aestivum L.) cultivars for sensitivity to ozone.
- Authors
Saitanis, Costas; Bari, Shafiqul; Burkey, Kent; Stamatelopoulos, Dimitris; Agathokleous, Evgenios
- Abstract
The sensitivity to ozone of ten Bangladeshi wheat cultivars was tested by exposing plants to eight ozone exposure regimes (50, 60, 80, 100, 120, 135, 150, and 200 ppb for 14, 11, 8, 6, 5, 4, 3, and 1 days, respectively, for 8 h/day) in controlled environment chambers. Visible leaf injury, dry weight, chlorophyll, carotenoid content, leaf greenness (SPAD value), quantum yield of photosynthesis, and stomatal resistance were measured to evaluate response. Shoot biomass, total chlorophyll, leaf greenness, and carotenoid content were reduced in ozone-exposed plants. Based on the results of principal component analysis (PCA)-biplot analysis, the order of sensitivity to ozone was: Akbar >> Sufi ≥ Bijoy ≥ Shatabdi > Bari-26 ≥ Gourab > Bari-25 ≥ Prodip ≥ Sourav >> Kanchan. The most important parameters to discriminate cultivars with respect to ozone sensitivity were visible injury and chlorophyll b/ a ratio, whereas quantum yield of photosynthesis was less important. Differences in stomatal resistance were not a significant factor in ozone response. Regression of cultivars' PCA scores against year of release revealed no trend, suggesting that ozone tolerance was not incorporated during cultivar breeding.
- Subjects
WINTER wheat; EFFECT of ozone on plants; EFFECT of pollution on plants; GROWTH cabinets &; rooms; PHOTOSYNTHESIS
- Publication
Environmental Science & Pollution Research, 2014, Vol 21, Issue 23, p13560
- ISSN
0944-1344
- Publication type
Article
- DOI
10.1007/s11356-014-3286-9