Abstract
The CO2 concentration in the atmosphere is rising and anticipated to be doubled by the end of the current century. Agricultural crop production is one of the key sectors that might be affected by rising atmospheric CO2 through its effect on photosynthetic rates and thus productivity. It was reported that C3 plants respond to elevated CO2 by modification of morpho-physiological traits. The crop selected for the present study was Green gram (Vigna radiate L. Wilczek). Though it is an important crop, the availability of pulses has declined. So, a study of the plant responses to high atmospheric CO2 is important since it regulates productivity and quality. Moreover information about genotypic variation of crops under elevated CO2 is lacking in legumes. The general aim of the study is test whether Green gram can adapt to such a change and to explore mechanisms underlining the adaptive response. Six genotypes of green gram used in the study were SML1827, SML832, SML1831, PM1533, Pusa M-19-31, and Pant M-5. Three different levels of CO2 concentration namely 390ppm, 600 ppm and 750ppm under open top chambers along with an ambient concentration were maintained to assess the response of growth, physiological and yield parameters. The purpose of Open Top Chamber was to study the response of plants in high CO2 environment with precise control and regulation of desired CO2, temperature and humidity. The results obtained for this experiment showed that elevated CO2 has a positive effect on crop growth and development. Results indicated that 600ppm CO2 enhanced some growth parameters viz. leaf area, number of branches per plant, number of effective root nodules and total biomass of plant which ultimately influenced the yield. Under 750 ppm CO2, An opposite trend was recorded where yield was significantly reduced. Genotypes like Pant M-5, Pusa M-19-31 could be considered as better genotypes when grown under elevated levels of CO2 as they have better N acquisition capability because of greater nodule formation in addition to biomass accumulation. Therefore, such genotypes may be utilized as future breeding materials for adaptation to the changed climatic condition.
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Claims 7
Claim · model-written summary
Elevated CO2 has a positive effect on green gram growth and development.
- Taxon
- Green gram
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Vigna radiata var. radiatae0 - Treatment
- elevated CO2e1
- Outcome
- crop growth and developmente1
- Direction
- positive effecte1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“The crop selected for the present study was Green gram (Vigna radiate L. Wilczek)”
e1“The results obtained for this experiment showed that elevated CO2 has a positive effect on crop growth and development”
Claim · model-written summary
600 ppm CO2 enhanced leaf area, number of branches per plant and number of effective root nodules of green gram compared with ambient CO2.
- Taxon
- Green gramVigna radiata var. radiatae0
- Organ / stage
- root nodulese2
- Treatment
- 600ppm CO2e2
- Outcome
- leaf area, number of branches per plant, number of effective root nodulese2
- Direction
- enhancede2
- Comparator
- ambient concentratione3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The crop selected for the present study was Green gram (Vigna radiate L. Wilczek)”
e2“Results indicated that 600ppm CO2 enhanced some growth parameters viz. leaf area, number of branches per plant, number of effective root nodules and total biomass of plant which ultimately influenced the yield”
e3“along with an ambient concentration”
Claim · model-written summary
600 ppm CO2 enhanced total biomass of green gram compared with ambient CO2.
- Taxon
- Green gramVigna radiata var. radiatae0
- Treatment
- 600ppm CO2e2
- Outcome
- total biomass of plante2
- Direction
- enhancede2
- Comparator
- ambient concentratione3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The crop selected for the present study was Green gram (Vigna radiate L. Wilczek)”
e2“Results indicated that 600ppm CO2 enhanced some growth parameters viz. leaf area, number of branches per plant, number of effective root nodules and total biomass of plant which ultimately influenced the yield”
e3“along with an ambient concentration”
Claim · model-written summary
750 ppm CO2 significantly reduced green gram yield.
- Taxon
- Green gramVigna radiata var. radiatae0
- Treatment
- 750 ppm CO2e4
- Outcome
- yielde4
- Direction
- reducede4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The crop selected for the present study was Green gram (Vigna radiate L. Wilczek)”
e4“Under 750 ppm CO2, An opposite trend was recorded where yield was significantly reduced”
Claim · model-written summary
Pant M-5 and Pusa M-19-31 have better nitrogen acquisition under elevated CO2 because of greater nodule formation.
- Taxon
- Green gramVigna radiata var. radiatae0
- Material
- Pant M-5, Pusa M-19-31e6
- Outcome
- N acquisition capabilitye5
- Qualifier
- because of greater nodule formatione5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The crop selected for the present study was Green gram (Vigna radiate L. Wilczek)”
e5“as they have better N acquisition capability because of greater nodule formation”
e6“Genotypes like Pant M-5, Pusa M-19-31 could be considered as better genotypes when grown under elevated levels of CO2”
Claim · model-written summary
Pant M-5 and Pusa M-19-31 could be considered better genotypes under elevated CO2.
- Taxon
- Green gramVigna radiata var. radiatae0
- Material
- Pant M-5, Pusa M-19-31e6
- Treatment
- elevated levels of CO2e6
- Outcome
- better genotypese6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The crop selected for the present study was Green gram (Vigna radiate L. Wilczek)”
e6“Genotypes like Pant M-5, Pusa M-19-31 could be considered as better genotypes when grown under elevated levels of CO2”
Claim · model-written summary
Such green gram genotypes may be used as future breeding materials for adaptation to elevated CO2.
- Taxon
- Green gramVigna radiata var. radiatae0
- Material
- such genotypese7
- Outcome
- future breeding materialse7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The crop selected for the present study was Green gram (Vigna radiate L. Wilczek)”
e7“such genotypes may be utilized as future breeding materials”
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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.