Abstract
Ozone pollution is a damaging air pollutant that reduces maize yields equivalently to nutrient deficiency, heat, and aridity stress. Therefore, understanding the physiological and biochemical responses of maize to ozone pollution and identifying traits predictive of ozone tolerance is important. In this study, we examined the physiological, biochemical and yield responses of six maize hybrids to elevated ozone in the field using Free Air Ozone Enrichment. Elevated ozone stress reduced photosynthetic capacity, in vivo and in vitro, decreasing Rubisco content, but not activation state. Contrary to our hypotheses, variation in maize hybrid responses to ozone was not associated with stomatal limitation or antioxidant pools in maize. Rather, tolerance to ozone stress in the hybrid B73 × Mo17 was correlated with maintenance of leaf N content. Sensitive lines showed greater ozone-induced senescence and loss of photosynthetic capacity compared to the tolerant line.
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Claims 8
Claim · model-written summary
Elevated ozone reduced maize photosynthetic capacity in vivo and in vitro.
- Treatment
- Elevated ozone stresse0
- Outcome
- photosynthetic capacity, in vivo and in vitroe0
- Direction
- reducede0
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Elevated ozone stress reduced photosynthetic capacity, in vivo and in vitro”
t0“maize hybrids”
Claim · model-written summary
Elevated ozone decreased maize Rubisco content.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Elevated ozone stress reduced photosynthetic capacity, in vivo and in vitro, decreasing Rubisco content”
t0“maize hybrids”
Claim · model-written summary
Elevated ozone did not decrease Rubisco activation state.
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“decreasing Rubisco content, but not activation state”
e1“Elevated ozone stress”
t0“maize hybrids”
Claim · model-written summary
Hybrid ozone responses were not associated with stomatal limitation.
Not reportedOrgan / stageDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“variation in maize hybrid responses to ozone was not associated with stomatal limitation”
Claim · model-written summary
Hybrid ozone responses were not associated with antioxidant pools.
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“variation in maize hybrid responses to ozone was not associated with stomatal limitation or antioxidant pools in maize”
Claim · model-written summary
Ozone tolerance in B73 × Mo17 correlated with maintenance of leaf N content.
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“tolerance to ozone stress in the hybrid B73 × Mo17 was correlated with maintenance of leaf N content”
t0“maize hybrids”
Claim · model-written summary
Sensitive maize lines showed greater ozone induced senescence than the tolerant line.
- Material
- Sensitive linese0
- Outcome
- ozone-induced senescencee0
- Direction
- greatere0
- Comparator
- the tolerant linee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sensitive lines showed greater ozone-induced senescence and loss of photosynthetic capacity compared to the tolerant line”
t0“maize hybrids”
Claim · model-written summary
Sensitive maize lines showed greater loss of photosynthetic capacity than the tolerant line.
- Material
- Sensitive linese0
- Outcome
- loss of photosynthetic capacitye0
- Direction
- greatere0
- Comparator
- the tolerant linee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sensitive lines showed greater ozone-induced senescence and loss of photosynthetic capacity compared to the tolerant line”
t0“maize hybrids”
The same questions in other papers
ozone · physiology: photosynthesis · Zea mays (maize)Positive and negative results
8 papers in the same direction as this paper · 2 in the opposite direction
- positive
- negative
- no effect
7 papers more in this group
See all 11 papers →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.