Abstract
The possible alteration in plant growth, productivity and phosphorus (P) demand of wheat under rising atmospheric CO2 and temperature is expected to influence the partitioning of P to different plant parts of wheat. A phytotron experiment was conducted to study the effects of elevated atmospheric CO2 (650 µmol mol-1) and elevated temperature (ambient + 3 °C) on phosphorus harvest index of wheat at various levels (control, 100% and 200% of recommended P) of P fertilization. While there was a slight increase (5.6%) in P harvest index of wheat under elevated CO2, the reverse trend (12.7% decline) was observed under elevated temperature with no consistent effect at various levels of P fertilization. Interestingly, there was a moderate decline (7.7%) in P harvest index of wheat under combined elevation of CO2 and temperature as compared to their ambient combination. The results suggest that temperature could be the dominant factor as compared to the atmospheric CO2 in deciding the overall impact of projected increase in atmospheric CO2 and temperature on P harvest index of wheat. As there is logically possible relationship between P harvest index of wheat and various physical and nutritional qualities of wheat grains such as grain Zn and Fe content and their bio-availability, grain protein content, seedling vigour, etc., the decline in wheat’s P harvest index under projected levels of CO2 and temperature in our study underscores the need of undertaking elaborate experimentations to investigate the probable effects of climate change on quality parameters associated with P harvest index of wheat.
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Claims 5
Claim · model-written summary
Elevated CO2 slightly increased the P harvest index of wheat by 5.6%.
- Taxon
- wheat
Triticum aestivume1 - Treatment
- elevated CO2e1
- Outcome
- P harvest indexe1
- Direction
- increasee1
- Value
- 5.6%e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“there was a slight increase (5.6%) in P harvest index of wheat under elevated CO2”
Claim · model-written summary
Elevated temperature reduced the P harvest index of wheat by 12.7%.
- Taxon
- wheatTriticum aestivume1
- Treatment
- elevated temperaturee1
- Outcome
- P harvest indexe1
- Direction
- declinee1
- Value
- 12.7%e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“there was a slight increase (5.6%) in P harvest index of wheat under elevated CO2, the reverse trend (12.7% decline) was observed under elevated temperature”
Claim · model-written summary
The effect on wheat P harvest index was not consistent across the levels of P fertilization.
- Taxon
- wheatTriticum aestivume1
- Treatment
- P fertilizatione1
- Outcome
- P harvest indexe1
- Direction
- no consistent effecte1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“there was a slight increase (5.6%) in P harvest index of wheat under elevated CO2, the reverse trend (12.7% decline) was observed under elevated temperature with no consistent effect at various levels of P fertilization”
Claim · model-written summary
Combined elevated CO2 and temperature moderately reduced wheat P harvest index by 7.7% relative to their ambient combination.
- Taxon
- wheatTriticum aestivume1
- Treatment
- combined elevation of CO2 and temperaturee1
- Outcome
- P harvest indexe1
- Direction
- declinee1
- Value
- 7.7%e1
- Comparator
- ambient combinatione1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“there was a moderate decline (7.7%) in P harvest index of wheat under combined elevation of CO2 and temperature as compared to their ambient combination”
Claim · model-written summary
The authors suggest temperature could be the dominant factor, compared with atmospheric CO2, in determining the impact of projected CO2 and temperature increases on wheat P harvest index.
- Taxon
- wheatTriticum aestivume1
- Treatment
- temperaturee1
- Outcome
- P harvest indexe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“temperature could be the dominant factor as compared to the atmospheric CO2 in deciding the overall impact of projected increase in atmospheric CO2 and temperature on P harvest index of wheat”
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