Abstract
The ozone is the primary gaseous pollutant with significant adverse effects on vegetation.Those effects include visible leaf injury, growth and yield reductions,accelerated senescence and altering sensitivity to biotic and abiotic stresses.Reductions in photosynthesis rate, stomata conductance,and root/shoot ratio,increasing in respiration,and changing in crop quality has also been observed in many crops.With fast industrial development,tropospheric ozone in the Yangtze River Delta,in Eastern China,as risen since the later of the last century.The elevated ozone has became a prominent environmental and economic issue in this region. In order to alleviate the phytotoxin of elevated level O3 to crops,the prevention of exogenous ascorbic acid(ExAsA)on growth of rice(Oryza sativa L.)was investigated.Rice was grown in open top chambers(OTCs)under field conditions and exposed to four levels of O3:NF(No-Filter)with a daily average of 20~50 nL·L-1; CF(Charcoal-Filter)with an 8 h average of 5~15 nL·L-1; OzoneⅠwith an 8 h average of 100 nL·L-1; Ozone Ⅱwith an 8 h average of 200 nL·L-1. The concentration of exogenous ascorbic acid was 0.1%(m/V). The results showed that compared to CF, the chlorophyll a content of rice leaves, the plant height of rice, leaves area, per panicle total grain and weight decreased under the treatment of high ozone concentration (200 nL· L-1), 47.9%, 17.8%, 31.6%, 45.7% and 42.9% respectively. But with exogenous ascorbic acid spraying, there was a rising trend in the chlorophyll a content of rice leaves, the plant height of rice , leaves area , per panicle total grain and weight, 11.6%,7.7%,17.4%,5.6%, 11.1% respectively. From these results, it can thought that ExAsA defers leaf senescence, increases the tolerance ability of rice under elevated O3 and improved effectively rice growth.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 11
Claim · model-written summary
High ozone (200 nL· L-1) decreased chlorophyll a content of rice leaves by 47.9% compared with CF.
- Taxon
- rice
Oryza sativae0 - Treatment
- high ozone concentration (200 nL· L-1)e0
- Outcome
- chlorophyll a content of rice leavese0
- Direction
- decreasede0
- Value
- 47.9%e0
- Comparator
- CFe0
- Setting
- field conditionse3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The results showed that compared to CF, the chlorophyll a content of rice leaves, the plant height of rice, leaves area, per panicle total grain and weight decreased under the treatment of high ozone concentration (200 nL· L-1), 47.9%, 17.8%, 31.6%, 45.7% and 42.9% respectively”
e3“Rice was grown in open top chambers(OTCs)under field conditions”
Claim · model-written summary
High ozone (200 nL· L-1) decreased plant height of rice by 17.8% compared with CF.
- Taxon
- riceOryza sativae0
- Treatment
- high ozone concentration (200 nL· L-1)e0
- Outcome
- plant height of ricee0
- Direction
- decreasede0
- Value
- 17.8%e0
- Comparator
- CFe0
- Setting
- field conditionse3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The results showed that compared to CF, the chlorophyll a content of rice leaves, the plant height of rice, leaves area, per panicle total grain and weight decreased under the treatment of high ozone concentration (200 nL· L-1), 47.9%, 17.8%, 31.6%, 45.7% and 42.9% respectively”
e3“Rice was grown in open top chambers(OTCs)under field conditions”
Claim · model-written summary
High ozone (200 nL· L-1) decreased rice leaf area by 31.6% compared with CF.
- Taxon
- riceOryza sativae0
- Treatment
- high ozone concentration (200 nL· L-1)e0
- Outcome
- leaves areae0
- Direction
- decreasede0
- Value
- 31.6%e0
- Comparator
- CFe0
- Setting
- field conditionse3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The results showed that compared to CF, the chlorophyll a content of rice leaves, the plant height of rice, leaves area, per panicle total grain and weight decreased under the treatment of high ozone concentration (200 nL· L-1), 47.9%, 17.8%, 31.6%, 45.7% and 42.9% respectively”
e3“Rice was grown in open top chambers(OTCs)under field conditions”
Claim · model-written summary
High ozone (200 nL· L-1) decreased per-panicle total grain of rice by 45.7% compared with CF.
- Taxon
- riceOryza sativae0
- Treatment
- high ozone concentration (200 nL· L-1)e0
- Outcome
- per panicle total graine0
- Direction
- decreasede0
- Value
- 45.7%e0
- Comparator
- CFe0
- Setting
- field conditionse3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The results showed that compared to CF, the chlorophyll a content of rice leaves, the plant height of rice, leaves area, per panicle total grain and weight decreased under the treatment of high ozone concentration (200 nL· L-1), 47.9%, 17.8%, 31.6%, 45.7% and 42.9% respectively”
e3“Rice was grown in open top chambers(OTCs)under field conditions”
Claim · model-written summary
High ozone (200 nL· L-1) decreased per-panicle grain weight of rice by 42.9% compared with CF.
- Taxon
- riceOryza sativae0
- Treatment
- high ozone concentration (200 nL· L-1)e0
- Outcome
- weighte0
- Direction
- decreasede0
- Value
- 42.9%e0
- Qualifier
- per panicle total grain and weighte0
- Comparator
- CFe0
- Setting
- field conditionse3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The results showed that compared to CF, the chlorophyll a content of rice leaves, the plant height of rice, leaves area, per panicle total grain and weight decreased under the treatment of high ozone concentration (200 nL· L-1), 47.9%, 17.8%, 31.6%, 45.7% and 42.9% respectively”
e3“Rice was grown in open top chambers(OTCs)under field conditions”
Claim · model-written summary
Exogenous ascorbic acid spraying raised chlorophyll a content of rice leaves by 11.6% under high ozone.
- Taxon
- riceOryza sativae0
- Treatment
- exogenous ascorbic acid sprayinge1
- Outcome
- chlorophyll a content of rice leavese1
- Direction
- rising trende1
- Value
- 11.6%e1
- Comparator
- high ozone concentration (200 nL· L-1)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The results showed that compared to CF, the chlorophyll a content of rice leaves, the plant height of rice, leaves area, per panicle total grain and weight decreased under the treatment of high ozone concentration (200 nL· L-1), 47.9%, 17.8%, 31.6%, 45.7% and 42.9% respectively”
e1“But with exogenous ascorbic acid spraying, there was a rising trend in the chlorophyll a content of rice leaves, the plant height of rice , leaves area , per panicle total grain and weight, 11.6%,7.7%,17.4%,5.6%, 11.1% respectively”
Claim · model-written summary
Exogenous ascorbic acid spraying raised plant height of rice by 7.7% under high ozone.
- Taxon
- riceOryza sativae1
- Treatment
- exogenous ascorbic acid sprayinge1
- Outcome
- plant height of ricee1
- Direction
- rising trende1
- Value
- 7.7%e1
- Comparator
- high ozone concentration (200 nL· L-1)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The results showed that compared to CF, the chlorophyll a content of rice leaves, the plant height of rice, leaves area, per panicle total grain and weight decreased under the treatment of high ozone concentration (200 nL· L-1), 47.9%, 17.8%, 31.6%, 45.7% and 42.9% respectively”
e1“But with exogenous ascorbic acid spraying, there was a rising trend in the chlorophyll a content of rice leaves, the plant height of rice , leaves area , per panicle total grain and weight, 11.6%,7.7%,17.4%,5.6%, 11.1% respectively”
Claim · model-written summary
Exogenous ascorbic acid spraying raised leaf area of rice by 17.4% under high ozone.
- Taxon
- riceOryza sativae1
- Treatment
- exogenous ascorbic acid sprayinge1
- Outcome
- leaves areae1
- Direction
- rising trende1
- Value
- 17.4%e1
- Comparator
- high ozone concentration (200 nL· L-1)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The results showed that compared to CF, the chlorophyll a content of rice leaves, the plant height of rice, leaves area, per panicle total grain and weight decreased under the treatment of high ozone concentration (200 nL· L-1), 47.9%, 17.8%, 31.6%, 45.7% and 42.9% respectively”
e1“But with exogenous ascorbic acid spraying, there was a rising trend in the chlorophyll a content of rice leaves, the plant height of rice , leaves area , per panicle total grain and weight, 11.6%,7.7%,17.4%,5.6%, 11.1% respectively”
Claim · model-written summary
Exogenous ascorbic acid spraying raised per-panicle total grain of rice by 5.6% under high ozone.
- Taxon
- riceOryza sativae1
- Treatment
- exogenous ascorbic acid sprayinge1
- Outcome
- per panicle total graine1
- Direction
- rising trende1
- Value
- 5.6%e1
- Comparator
- high ozone concentration (200 nL· L-1)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The results showed that compared to CF, the chlorophyll a content of rice leaves, the plant height of rice, leaves area, per panicle total grain and weight decreased under the treatment of high ozone concentration (200 nL· L-1), 47.9%, 17.8%, 31.6%, 45.7% and 42.9% respectively”
e1“But with exogenous ascorbic acid spraying, there was a rising trend in the chlorophyll a content of rice leaves, the plant height of rice , leaves area , per panicle total grain and weight, 11.6%,7.7%,17.4%,5.6%, 11.1% respectively”
Claim · model-written summary
Exogenous ascorbic acid spraying raised per-panicle grain weight of rice by 11.1% under high ozone.
- Taxon
- riceOryza sativae1
- Treatment
- exogenous ascorbic acid sprayinge1
- Outcome
- weighte1
- Direction
- rising trende1
- Value
- 11.1%e1
- Comparator
- high ozone concentration (200 nL· L-1)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The results showed that compared to CF, the chlorophyll a content of rice leaves, the plant height of rice, leaves area, per panicle total grain and weight decreased under the treatment of high ozone concentration (200 nL· L-1), 47.9%, 17.8%, 31.6%, 45.7% and 42.9% respectively”
e1“But with exogenous ascorbic acid spraying, there was a rising trend in the chlorophyll a content of rice leaves, the plant height of rice , leaves area , per panicle total grain and weight, 11.6%,7.7%,17.4%,5.6%, 11.1% respectively”
Claim · model-written summary
The authors interpret exogenous ascorbic acid as delaying leaf senescence and increasing rice tolerance to elevated ozone.
- Taxon
- riceOryza sativae2
- Treatment
- ExAsAe2
- Outcome
- tolerance abilitye2
- Qualifier
- defers leaf senescencee2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“ExAsA defers leaf senescence, increases the tolerance ability of rice under elevated O3 and improved effectively rice growth”
The same questions in other papers
ascorbic acid · growth · Oryza sativa (rice)Results differ
4 papers in the same direction as this paper · 2 in the opposite direction
- negative
- no effect
- positive
3 papers more in this group
See all 7 papers →ascorbic acid · physiology: pigments · Oryza sativa (rice)Results agree
1 paper in the same direction as this paper
- positive
ascorbic acid · yield · Oryza sativa (rice)Results agree
8 papers in the same direction as this paper
- positive
- positive
- positive
5 papers more in this group
See all 9 papers →ozone · growth · Oryza sativa (rice)Results differ
23 papers in the same direction as this paper · 3 in the opposite direction
- positive
- positive
- positive
23 papers more in this group
See all 27 papers →ozone · yield · Oryza sativa (rice)Results differ
31 papers in the same direction as this paper · 7 in the opposite direction
- positive
- positive
- positive
35 papers more in this group
See all 39 papers →application · physiology: pigments · Oryza sativa (rice)Positive and negative results
48 papers in the same direction as this paper · 2 in the opposite direction · 1 reporting no difference from an alternative
- negative
- no effect
- no effect
48 papers more in this group
See all 52 papers →application · growth · Oryza sativa (rice)Positive and negative results
273 papers in the same direction as this paper · 36 in the opposite direction · 3 reporting no difference from an alternative
- negative
- negative
- no effect
309 papers more in this group
See all 313 papers →application · yield · Oryza sativa (rice)Positive and negative results
644 papers in the same direction as this paper · 37 in the opposite direction · 9 reporting no difference from an alternative
- negative
- no effect
- no effect
687 papers more in this group
See all 691 papers →8 of 9 groups shown: named compounds and organisms first, then groups whose results differ (checked claim by claim), then those with positive and negative results, then the smaller groups.
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.