Abstract
Tropospheric ozone is the most important atmospheric pollutant affecting agricultural crops due to its phytotoxicity. Wheat plant, as an important and dominant cereal crop has been found to be sensitive to elevated ozone levels leading to adverse effects on growth and productivity. The objective of this study is to assess the impact of the ambient air concentration and the future increase in tropospheric ozone concentration on some physiological and morphological traits of two wheat plant (Triticum durum) varieties, Semito and Creso. Open‐top chamber (OTC) field experiments were conducted during two consecutive years 2016-2017 and 2017-2018 under environmental conditions of Kurdistan region of Iraq, accumulated exposure over threshold of 40 ppb (AOT40) was tested, the treatment were i) ambient air concentration (32-37) ppb, ii) 50 ppb and iii) 60 ppb. Elevated Ozone concentration show a significant negative effect on total chlorophyll content (SPAD), relative water content, leaf area, plant height and consequently reducing above ground biomass, while in the same time induced increase in proline content in flag leaves. The present study demonstrate that the elevated tropospheric Ozone concentration significantly affect a range of important physiological and morphological characteristics of both varieties of wheat plant (T. durum).
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Claims 5
Claim · model-written summary
Elevated ozone significantly reduced chlorophyll content in both wheat varieties.
- Taxon
- WHEAT PLANT
Triticum aestivumt0 - Treatment
- Elevated Ozone concentratione0
- Outcome
- total chlorophyll content (SPAD)e0
- Direction
- negative effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Elevated Ozone concentration show a significant negative effect on total chlorophyll content (SPAD), relative water content, leaf area, plant height and consequently reducing above ground biomass”
t0“TWO WHEAT PLANT VARIETIES”
Claim · model-written summary
Elevated ozone significantly reduced relative water content.
- Taxon
- WHEAT PLANTTriticum aestivumt0
- Treatment
- Elevated Ozone concentratione0
- Outcome
- relative water contente0
- Direction
- negative effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Elevated Ozone concentration show a significant negative effect on total chlorophyll content (SPAD), relative water content, leaf area, plant height and consequently reducing above ground biomass”
t0“TWO WHEAT PLANT VARIETIES”
Claim · model-written summary
Elevated ozone significantly reduced leaf area and plant height.
- Taxon
- WHEAT PLANTTriticum aestivumt0
- Treatment
- Elevated Ozone concentratione0
- Outcome
- leaf area, plant heighte0
- Direction
- negative effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Elevated Ozone concentration show a significant negative effect on total chlorophyll content (SPAD), relative water content, leaf area, plant height and consequently reducing above ground biomass”
t0“TWO WHEAT PLANT VARIETIES”
Claim · model-written summary
Elevated ozone reduced above ground biomass.
- Taxon
- WHEAT PLANTTriticum aestivumt0
- Treatment
- Elevated Ozone concentratione0
- Outcome
- above ground biomasse0
- Direction
- reducinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Elevated Ozone concentration show a significant negative effect on total chlorophyll content (SPAD), relative water content, leaf area, plant height and consequently reducing above ground biomass”
t0“TWO WHEAT PLANT VARIETIES”
Claim · model-written summary
Elevated ozone increased proline content in flag leaves.
- Taxon
- WHEAT PLANTTriticum aestivumt0
- Organ / stage
- flag leavese0
- Outcome
- proline contente0
- Direction
- increasee0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“induced increase in proline content in flag leaves”
t0“TWO WHEAT PLANT VARIETIES”
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Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.