Abstract
An experiment was laid out to study the impact of eCO2 (550ppm), eT (+3ºC) and their interaction (eCO2+eT) on rooting behaviour of cuttings of three grape varieties- Thompson Seedless, Bangalore Blue, and Dogridge in FATE and OTC facilities. Observations were recorded at 50 and 80 days after planting (DAP) and root growth data was recorded and analysed using WinRHIZO root scanner and its software. Analysis revealed that, among the selected grape varieties, Thompson Seedless cuttings has shown highest number of roots, root volume and dry biomass under eCO2 and eCO2+ eT conditions, while total root length and root length density were highest with Bangalore Blue. Under eT condition, Bangalore Blue showed highest number of roots, total root length and root length density, while root volume and dry biomass was highest with Thompson Seedless. The per se values of root parameters under all conditions and their response to eCO2 was lowest with Dogridge. Though eT condition reduced all the root parameters, their performance improved under eCO2+ eT indicating the presence of higher concentration of CO2 reduced the ill effects of high temperature. Overall, eCO2 and eCO2+eT conditions improved root parameters of grape varieties, while eT reduced them as compared to their performance under ambient condition and varietal variation is significant.
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Claims 9
Claim · model-written summary
Elevated CO2 and combined eCO2+eT improved root parameters of grape varieties compared with ambient condition.
Verbatim
t0“grape cuttings”
e1“in FATE and OTC facilities”
e2“Overall, eCO2 and eCO2+eT conditions improved root parameters of grape varieties, while eT reduced them as compared to their performance under ambient condition”
Claim · model-written summary
Elevated temperature reduced the root parameters of grape compared with ambient condition.
Verbatim
t0“grape cuttings”
e2“eT reduced them as compared to their performance under ambient condition”
Claim · model-written summary
Thompson Seedless had the highest number of roots, root volume and dry biomass under eCO2 and eCO2+eT.
Verbatim
t0“grape cuttings”
e3“Thompson Seedless cuttings has shown highest number of roots, root volume and dry biomass under eCO2 and eCO2+ eT conditions”
Claim · model-written summary
Bangalore Blue had the highest total root length and root length density.
Verbatim
t0“grape cuttings”
e4“while total root length and root length density were highest with Bangalore Blue”
Claim · model-written summary
Under eT, Bangalore Blue had the highest number of roots, total root length and root length density.
Verbatim
t0“grape cuttings”
e5“Under eT condition, Bangalore Blue showed highest number of roots, total root length and root length density”
Claim · model-written summary
Under eT, Thompson Seedless had the highest root volume and dry biomass.
Verbatim
t0“grape cuttings”
e5“Under eT condition, Bangalore Blue showed highest number of roots, total root length and root length density, while root volume and dry biomass was highest with Thompson Seedless”
e6“root volume and dry biomass was highest with Thompson Seedless”
Claim · model-written summary
Dogridge had the lowest root parameters under all conditions and in response to eCO2.
Verbatim
t0“grape cuttings”
e7“The per se values of root parameters under all conditions and their response to eCO2 was lowest with Dogridge”
Claim · model-written summary
Varietal variation in root response among grape varieties is significant.
Verbatim
t0“grape cuttings”
e1“varietal variation is significant”
Claim · model-written summary
Higher CO2 concentration reduced the ill effects of high temperature on grape root growth.
Verbatim
t0“grape cuttings”
e1“Though eT condition reduced all the root parameters, their performance improved under eCO2+ eT indicating the presence of higher concentration of CO2 reduced the ill effects of high temperature”