Abstract
Current research on the effect of increased UV-B radiation on crop production has been limited to exposing plants to improbable UV-B dose or growth condition. The objective of this study was to test the effects of short-term modulated increased UV-B radiation on maize (Zea mays L.) growth, grain yield, and quality under field conditions for three years. A modulated irradiance system was used to maintain UV-B radiation at 30% above the ambient level and was applied daily between the elongation and silking stages of maize. The result indicated that increased UV-B radiation adversely affected maize growth and yield, especially on plant height when UV-B was enhanced at the elongation stage and on yield when UV-B was enhanced near the silking stage. Yield reduction that induced by enhanced UV-B radiation was associated with reductions in number of kernels per row and kernel mass. Protein content of grains was increased with enhanced UV-B radiation, but oil and starch contents were not affected. This study confirmed the sensitivity of maize to increased UV-B radiation under the field condition, and contributed to understand the full negative and positive effects of increased UV-B radiation on crop production.
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Claims 6
Claim · model-written summary
Enhanced UV-B adversely affected maize growth, particularly plant height when exposure began at elongation.
- Organ / stage
- elongation stagee0
- Treatment
- increased UV-B radiatione0
- Outcome
- plant heighte0
- Direction
- adversely affectede0
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increased UV-B radiation adversely affected maize growth and yield, especially on plant height when UV-B was enhanced at the elongation stage”
Claim · model-written summary
Enhanced UV-B reduced maize yield especially when exposure occurred near silking.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increased UV-B radiation adversely affected maize growth and yield, especially on plant height when UV-B was enhanced at the elongation stage and on yield when UV-B was enhanced near the silking stage”
e1“Yield reduction that induced by enhanced UV-B radiation”
Claim · model-written summary
Enhanced UV-B reduced kernels per row, which was associated with yield reduction.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Yield reduction that induced by enhanced UV-B radiation was associated with reductions in number of kernels per row”
e1“maize (Zea mays L.)”
Claim · model-written summary
Enhanced UV-B reduced kernel mass, which was associated with yield reduction.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Yield reduction that induced by enhanced UV-B radiation was associated with reductions in number of kernels per row and kernel mass.”
e1“maize (Zea mays L.)”
Claim · model-written summary
Enhanced UV-B increased grain protein content.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Protein content of grains was increased with enhanced UV-B radiation”
e1“maize (Zea mays L.)”
Claim · model-written summary
Enhanced UV-B did not affect grain oil or starch content.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“oil and starch contents were not affected”
e1“Protein content of grains was increased with enhanced UV-B radiation, but oil and starch contents were not affected.”
e2“maize (Zea mays L.)”
The same questions in other papers
uv · yield · Zea mays (maize)Positive and negative results
9 papers in the same direction as this paper · 2 in the opposite direction
- negative
- negative
- no effect
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14 papers in the same direction as this paper · 9 in the opposite direction
- negative
- positive
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20 papers more in this group
See all 24 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.