Abstract
The experiment was conducted under glasshouse conditions to evaluate nitrogen use efficiency and drought tolerant ability of the five different sugarcane varieties (including NiF3, Ni9, Ni17, Ni21 and Ni22) under early growth stage from 60 to 120 days after transplanting. The results showed drought stress reduced the photosynthetic rate, growth parameters including plant height, leaf area; partial and total dry weights; and nitrogen use efficiency (NUE) traits including photosynthetic NUE, nitrogen utilization efficiency and biomass NUE of measured sugarcane varieties. The significant differences were found among varieties in growth parameters, dry weights, NUE traits and drought tolerant index (DTI). The significant positive correlations among NUE traits and DTI suggested higher NUEs could support better a tolerant ability to drought stress at the early growth stage. Because of larger contributions, DTIs for aboveground and stalk dry weight could be used as the important DTIs to evaluate drought tolerant ability in sugarcane varieties.Abbreviations Amax: potential photosynthetic rate; DAT: days after transplanting; DTI: drought tolerant index; NL: specific leaf nitrogen content; NUE: nitrogen use efficiency; NUEb: biomass nitrogen use efficiency; NUEt: nitrogen utilization efficiency; PNUE: photosynthetic nitrogen use efficiency; TN: total nitrogen content; TNU: total nitrogen uptake; WW: well-watered; DS: water stress.
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Claims 8
Claim · model-written summary
Drought reduced photosynthetic rate in sugarcane varieties.
Not reportedComparator
Verbatim
e0“drought stress reduced the photosynthetic rate”
t0“sugarcane varieties”
Claim · model-written summary
Drought reduced plant height and leaf area in sugarcane varieties.
Not reportedComparator
Verbatim
e0“drought stress reduced the photosynthetic rate, growth parameters including plant height, leaf area”
t0“sugarcane varieties”
Claim · model-written summary
Drought reduced partial and total dry weights in sugarcane varieties.
Not reportedComparator
Verbatim
e0“drought stress reduced the photosynthetic rate, growth parameters including plant height, leaf area; partial and total dry weights”
t0“sugarcane varieties”
Claim · model-written summary
Drought reduced photosynthetic nitrogen use efficiency, nitrogen utilization efficiency and biomass nitrogen use efficiency.
- Taxon
- sugarcanet0
- Treatment
- drought stresse0
- Outcome
- photosynthetic NUE, nitrogen utilization efficiency and biomass NUEe0
- Direction
- reducede0
Not reportedComparator
Verbatim
e0“drought stress reduced the photosynthetic rate, growth parameters including plant height, leaf area; partial and total dry weights; and nitrogen use efficiency (NUE) traits including photosynthetic NUE, nitrogen utilization efficiency and biomass NUE”
t0“sugarcane varieties”
Claim · model-written summary
Sugarcane varieties differed significantly in growth parameters, dry weights and NUE traits.
Verbatim
e0“The significant differences were found among varieties in growth parameters, dry weights, NUE traits and drought tolerant index (DTI).”
t0“sugarcane varieties”
Claim · model-written summary
Sugarcane varieties differed significantly in drought tolerant index.
Verbatim
e0“The significant differences were found among varieties in growth parameters, dry weights, NUE traits and drought tolerant index (DTI).”
t0“sugarcane varieties”
Claim · model-written summary
NUE traits were positively correlated with drought tolerant index.
Verbatim
e0“The significant positive correlations among NUE traits and DTI suggested higher NUEs could support better a tolerant ability to drought stress at the early growth stage.”
t0“sugarcane varieties”
Claim · model-written summary
Aboveground and stalk dry-weight drought tolerant indices were proposed for evaluating drought tolerance in sugarcane varieties.
Verbatim
e0“Because of larger contributions, DTIs for aboveground and stalk dry weight could be used as the important DTIs to evaluate drought tolerant ability in sugarcane varieties.”
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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.