Abstract
Current rise in concentration of tropospheric ozone (O3) has deleterious effect on growth and yield of crops. Wheat is one of the most O3 sensitive crops. Application of Chemical antioxidants may be beneficial to lessen the harmful effects of O3 on crops. A two year study growing wheat (variety PBW550) was carried at the farms of Indian Agricultural Research Institute, New Delhi in 2010–11 and 2011–12 to evaluate the efficacy of some natural and environment friendly antioxidant chemicals in ameliorating the negative impacts of elevated ozone on growth and productivity of wheat. The treatments were i) charcoal filtered air (CF) ii) 1% ascorbic acid (AA), iii) 100 ppm quercetin (Q), iv) 10% marigold leaves extract (Tagetes patula var pusa arpita) (T) and v) elevated O3 control (C). Additional 25–35 ppb of O3 over the ambient levels was maintained in all open top chambers except the CF treatment. The seasonal daily average O3 concentration in ambient air was 38 ppb in 2010–11 and 29 ppb in 2011–12 during the crop growth period. The exogenous application of antioxidants increased the levels of endogenous leaf ascorbic acid. The activity of antioxidant enzymes (superoxide dismutase, catalase and peroxidase) was lowered by 5 to 34% in antioxidants sprayed plants as compared to elevated O3 control (C). The application of antioxidants increased the yield of wheat by 23–26% in AA, 13–15% in Q and 8–10% in T as compared to C. The micronutrient (Cu, Fe, Zn and Mn) content of wheat grains on application of exogenous ascorbic acid was higher. The application of antioxidant chemicals was effective in alleviating the negative impacts of elevated O3 on enzyme activity and nutritional quality of wheat which increased the growth and yield of the crop
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Claims 7
Claim · model-written summary
Exogenous antioxidant application increased the levels of endogenous leaf ascorbic acid in wheat.
- Taxon
- Wheat
Triticum aestivume0 - Organ / stage
- leafe2
- Treatment
- exogenous application of antioxidantse2
- Outcome
- levels of endogenous leaf ascorbic acide2
- Direction
- increasede2
- Setting
- farms of Indian Agricultural Research Institute, New Delhie1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Wheat is one of the most O3 sensitive crops”
e1“at the farms of Indian Agricultural Research Institute, New Delhi”
e2“The exogenous application of antioxidants increased the levels of endogenous leaf ascorbic acid”
Claim · model-written summary
Antioxidant-sprayed wheat plants showed 5 to 34% lower antioxidant enzyme activity than elevated ozone controls.
- Taxon
- WheatTriticum aestivume0
- Treatment
- antioxidants sprayede2
- Gene
- superoxide dismutase, catalase and peroxidasee2
- Outcome
- activity of antioxidant enzymese2
- Direction
- lowerede2
- Value
- 5 to 34%e2
- Comparator
- elevated O3 controle2
- Setting
- farms of Indian Agricultural Research Institute, New Delhie1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Wheat is one of the most O3 sensitive crops”
e1“at the farms of Indian Agricultural Research Institute, New Delhi”
e2“The activity of antioxidant enzymes (superoxide dismutase, catalase and peroxidase) was lowered by 5 to 34% in antioxidants sprayed plants as compared to elevated O3 control (C)”
Claim · model-written summary
Ascorbic acid application increased wheat yield by 23–26% over elevated ozone control.
- Taxon
- wheatTriticum aestivume4
- Treatment
- 1% ascorbic acide2
- Outcome
- yield of wheate4
- Direction
- increasede4
- Value
- 23–26%e4
- Comparator
- elevated O3 controle3
- Setting
- farms of Indian Agricultural Research Institute, New Delhie1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Wheat is one of the most O3 sensitive crops”
e1“at the farms of Indian Agricultural Research Institute, New Delhi”
e2“1% ascorbic acid (AA)”
e3“v) elevated O3 control (C)”
e4“The application of antioxidants increased the yield of wheat by 23–26% in AA, 13–15% in Q and 8–10% in T as compared to C”
Claim · model-written summary
Quercetin application increased wheat yield by 13–15% over elevated ozone control.
- Taxon
- wheatTriticum aestivume4
- Treatment
- 100 ppm quercetine2
- Outcome
- yield of wheate4
- Direction
- increasede4
- Value
- 13–15%e4
- Comparator
- elevated O3 controle3
- Setting
- farms of Indian Agricultural Research Institute, New Delhie1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Wheat is one of the most O3 sensitive crops”
e1“at the farms of Indian Agricultural Research Institute, New Delhi”
e2“100 ppm quercetin (Q)”
e3“v) elevated O3 control (C)”
e4“The application of antioxidants increased the yield of wheat by 23–26% in AA, 13–15% in Q and 8–10% in T as compared to C”
Claim · model-written summary
Marigold leaf extract application increased wheat yield by 8–10% over elevated ozone control.
- Taxon
- wheatTriticum aestivume4
- Treatment
- 10% marigold leaves extracte2
- Outcome
- yield of wheate4
- Direction
- increasede4
- Value
- 8–10%e4
- Comparator
- elevated O3 controle3
- Setting
- farms of Indian Agricultural Research Institute, New Delhie1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Wheat is one of the most O3 sensitive crops”
e1“at the farms of Indian Agricultural Research Institute, New Delhi”
e2“10% marigold leaves extract (Tagetes patula var pusa arpita) (T)”
e3“v) elevated O3 control (C)”
e4“The application of antioxidants increased the yield of wheat by 23–26% in AA, 13–15% in Q and 8–10% in T as compared to C”
Claim · model-written summary
Exogenous ascorbic acid increased the micronutrient (Cu, Fe, Zn and Mn) content of wheat grains.
- Taxon
- wheatTriticum aestivume0
- Organ / stage
- grainse0
- Treatment
- exogenous ascorbic acide0
- Outcome
- micronutrient (Cu, Fe, Zn and Mn) contente0
- Direction
- highere0
- Setting
- farms of Indian Agricultural Research Institute, New Delhie1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The micronutrient (Cu, Fe, Zn and Mn) content of wheat grains on application of exogenous ascorbic acid was higher”
e1“at the farms of Indian Agricultural Research Institute, New Delhi”
Claim · model-written summary
Antioxidant application increased the growth and yield of wheat under elevated ozone.
- Taxon
- wheatTriticum aestivume0
- Treatment
- application of antioxidant chemicalse0
- Outcome
- growth and yield of the crope0
- Direction
- increasede0
- Qualifier
- alleviating the negative impacts of elevated O3e0
- Setting
- farms of Indian Agricultural Research Institute, New Delhie1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The application of antioxidant chemicals was effective in alleviating the negative impacts of elevated O3 on enzyme activity and nutritional quality of wheat which increased the growth and yield of the crop”
e1“at the farms of Indian Agricultural Research Institute, New Delhi”
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