Abstract
Abstract Potassium (K) deficiency is one of the main limiting factors in cotton ( Gossypium hirsutum L.) production. To study the mechanism of high K‐use efficiency of cotton, a pot experiment was conducted. The experiment consisted of two cotton genotypes differing in K‐use efficiency (H103 and L122) and two K‐application levels (K 0 : 0 g (kg soil) –1 ; K 1 : 0.40 g (kg soil) –1 ). Root‐hair density and length, partitioning of biomass and K in various organs, as well as K‐use efficiency of the two cotton genotypes were examined. The results show that there was no significant difference in K uptake between the two genotypes at both treatments, although the genotype H103 (high K‐use efficiency) exhibited markedly higher root‐hair density than genotype L122 in the K 1 treatment. Correlation analysis indicates that neither root‐hair density nor root‐hair length was correlated with plant K uptake. Furthermore, the boll biomass of genotype H103 was significantly higher than that of genotype L122 in both treatments, and the K accumulation in bolls of genotype H103 was 39%–48% higher than that of genotype L122. On the other hand, the litter index (LI) and the litter K‐partitioning index (LKPI) of genotype H103 were 14%–21% and 22%–27% lower than that of genotype L122. Lastly, the K‐use efficiency of total plant (KUE‐P) of genotype H103 was comparable with that of genotype L122 in both treatments, but the K‐use efficiency in boll yield (KUE‐B) of genotype H103 was 24% and 41% higher than that of genotype L122 in K 0 and K 1 treatments. Pearson correlation analysis indicated that KUE‐P was positively correlated with BKPI and negatively correlated with LKPI, while KUE‐B was positively correlated with BKPI and boll‐harvest index (HI B ), and negatively correlated with LKPI. It is concluded that there were no pronounced effects of root‐hair traits on plant K uptake of the two genotypes. The difference in K‐use efficiency was attributed to different patterns of biomass and K partitioning rather than difference in K uptake of the two genotypes.
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Claims 15
Claim · model-written summary
The two cotton genotypes did not differ significantly in K uptake at both K levels.
- Taxon
- Gossypium hirsutum
Gossypium hirsutumt0 - Material
- two genotypese1
- Outcome
- K uptakee1
- Direction
- no significant differencee1
- Qualifier
- at both treatmentse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cotton (Gossypium hirsutum)”
e1“there was no significant difference in K uptake between the two genotypes at both treatments”
Claim · model-written summary
Genotype H103 had markedly higher root‐hair density than genotype L122 in the K 1 treatment.
- Taxon
- Gossypium hirsutumGossypium hirsutumt0
- Material
- genotype H103e2
- Outcome
- root‐hair densitye2
- Direction
- markedly highere2
- Qualifier
- in the K 1 treatmente2
- Comparator
- genotype L122e2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cotton (Gossypium hirsutum)”
e2“genotype H103 (high K‐use efficiency) exhibited markedly higher root‐hair density than genotype L122 in the K 1 treatment”
Claim · model-written summary
Neither root-hair density nor root-hair length was correlated with plant K uptake.
- Taxon
- Gossypium hirsutumGossypium hirsutumt0
- Organ / stage
- root‐hair densitye3
- Outcome
- plant K uptakee3
- Direction
- correlatede3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cotton (Gossypium hirsutum)”
e3“neither root‐hair density nor root‐hair length was correlated with plant K uptake”
Claim · model-written summary
Boll biomass of genotype H103 was significantly higher than that of genotype L122 in both treatments.
- Taxon
- Gossypium hirsutumGossypium hirsutumt0
- Material
- genotype H103e4
- Organ / stage
- bolle4
- Outcome
- boll biomasse4
- Direction
- significantly highere4
- Comparator
- genotype L122e4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cotton (Gossypium hirsutum)”
e4“the boll biomass of genotype H103 was significantly higher than that of genotype L122 in both treatments”
Claim · model-written summary
K accumulation in bolls of genotype H103 was 39%–48% higher than in genotype L122.
- Taxon
- Gossypium hirsutumGossypium hirsutumt0
- Material
- genotype H103e5
- Outcome
- K accumulation in bollse5
- Direction
- highere5
- Value
- 39%–48%e5
- Comparator
- genotype L122e5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cotton (Gossypium hirsutum)”
e5“the K accumulation in bolls of genotype H103 was 39%–48% higher than that of genotype L122”
Claim · model-written summary
The litter index of genotype H103 was 14%–21% lower than that of genotype L122.
- Taxon
- Gossypium hirsutumGossypium hirsutumt0
- Material
- genotype H103e6
- Outcome
- litter index (LI)e6
- Direction
- lowere6
- Value
- 14%–21%e6
- Comparator
- genotype L122e6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cotton (Gossypium hirsutum)”
e6“the litter index (LI) and the litter K‐partitioning index (LKPI) of genotype H103 were 14%–21% and 22%–27% lower than that of genotype L122”
Claim · model-written summary
The litter K-partitioning index of genotype H103 was 22%–27% lower than that of genotype L122.
- Taxon
- Gossypium hirsutumGossypium hirsutumt0
- Material
- genotype H103e6
- Outcome
- litter K‐partitioning index (LKPI)e6
- Direction
- lowere6
- Value
- 22%–27%e6
- Comparator
- genotype L122e6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cotton (Gossypium hirsutum)”
e6“the litter index (LI) and the litter K‐partitioning index (LKPI) of genotype H103 were 14%–21% and 22%–27% lower than that of genotype L122”
Claim · model-written summary
K-use efficiency of the total plant of genotype H103 was comparable with that of genotype L122 in both treatments.
- Taxon
- Gossypium hirsutumGossypium hirsutumt0
- Material
- genotype H103e4
- Outcome
- K‐use efficiency of total plant (KUE‐P)e4
- Direction
- comparablee4
- Comparator
- genotype L122e4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cotton (Gossypium hirsutum)”
e4“the K‐use efficiency of total plant (KUE‐P) of genotype H103 was comparable with that of genotype L122 in both treatments”
Claim · model-written summary
K-use efficiency in boll yield of genotype H103 was 24% higher than that of genotype L122 in K 0.
- Taxon
- Gossypium hirsutumGossypium hirsutumt0
- Material
- genotype H103e0
- Outcome
- K‐use efficiency in boll yield (KUE‐B)e0
- Direction
- highere0
- Value
- 24%e0
- Qualifier
- in K 0e0
- Comparator
- genotype L122e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cotton (Gossypium hirsutum)”
e0“the K‐use efficiency in boll yield (KUE‐B) of genotype H103 was 24% and 41% higher than that of genotype L122 in K 0 and K 1 treatments”
Claim · model-written summary
K-use efficiency in boll yield of genotype H103 was 41% higher than that of genotype L122 in K 1.
- Taxon
- Gossypium hirsutumGossypium hirsutumt0
- Material
- genotype H103e0
- Outcome
- K‐use efficiency in boll yield (KUE‐B)e0
- Direction
- highere0
- Value
- 41%e0
- Qualifier
- K 1 treatmentse0
- Comparator
- genotype L122e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cotton (Gossypium hirsutum)”
e0“the K‐use efficiency in boll yield (KUE‐B) of genotype H103 was 24% and 41% higher than that of genotype L122 in K 0 and K 1 treatments”
Claim · model-written summary
K-use efficiency of the total plant was positively correlated with BKPI.
- Taxon
- Gossypium hirsutumGossypium hirsutumt0
- Outcome
- KUE‐Pe1
- Direction
- positively correlatede1
- Comparator
- BKPIe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cotton (Gossypium hirsutum)”
e1“Pearson correlation analysis indicated that KUE‐P was positively correlated with BKPI and negatively correlated with LKPI”
Claim · model-written summary
K-use efficiency of the total plant was negatively correlated with LKPI.
- Taxon
- Gossypium hirsutumGossypium hirsutumt0
- Outcome
- KUE‐Pe1
- Direction
- negatively correlatede1
- Comparator
- LKPIe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cotton (Gossypium hirsutum)”
e1“Pearson correlation analysis indicated that KUE‐P was positively correlated with BKPI and negatively correlated with LKPI”
Claim · model-written summary
K-use efficiency in boll yield was positively correlated with BKPI and boll-harvest index.
- Taxon
- Gossypium hirsutumGossypium hirsutumt0
- Outcome
- KUE‐Be2
- Direction
- positively correlatede2
- Comparator
- BKPI and boll‐harvest index (HI B)e2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cotton (Gossypium hirsutum)”
e2“KUE‐B was positively correlated with BKPI and boll‐harvest index (HI B), and negatively correlated with LKPI”
Claim · model-written summary
K-use efficiency in boll yield was negatively correlated with LKPI.
- Taxon
- Gossypium hirsutumGossypium hirsutumt0
- Outcome
- KUE‐Be2
- Direction
- negatively correlatede2
- Comparator
- LKPIe2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cotton (Gossypium hirsutum)”
e2“KUE‐B was positively correlated with BKPI and boll‐harvest index (HI B), and negatively correlated with LKPI”
Claim · model-written summary
The difference in K-use efficiency is attributed to different patterns of biomass and K partitioning rather than to K uptake.
- Taxon
- Gossypium hirsutumGossypium hirsutumt0
- Outcome
- K‐use efficiencye3
- Qualifier
- different patterns of biomass and K partitioninge3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cotton (Gossypium hirsutum)”
e3“The difference in K‐use efficiency was attributed to different patterns of biomass and K partitioning rather than difference in K uptake of the two genotypes”