Abstract
ABSTRACT Water deficiency has a serious effect on cotton productivity. Development of cotton bolls determines cotton fibre yield and quality and is affected by many environmental variables, including water availability. However, we know little about the effect of water stress on boll development and the final fibre yield and quality of the varieties with different boll sizes. In this study, cotton varieties with different boll sizes were used to compare the effect of water availability on boll development, characteristics of fibre yield and quality, seed components and seed vigour. The results showed that under the well‐watered (WW) and water‐deficit (WD) irrigation conditions, large boll (LB) and small boll (SB) varieties had a similar overall trend of boll volume change and accumulation of boll dry matter during boll development, but differed in the rate of dry matter accumulation and boll volume growth. Under WW treatment, the dry matter accumulation per boll of LB was significantly higher than that of SB at 42 days postanthesis (DPA), with a difference of 29.17%. WD led to a reduction in dry matter accumulation of bolls, and the dry matter accumulation in seed cotton and boll shell for LB varieties decreased by 20.45% and 3.24%, respectively, at 42 DPA. The corresponding decrease in SB varieties was, respectively, 16.76% and 2.81%, but the harvestable boll numbers per plant of SB varieties were 36.28% higher than that of LB varieties under WD irrigation. The lint yield of the SB varieties was 1042.45 kg·ha −1 and the seed cotton yield was 2459.67 kg·ha −1 , which were also comparable to those of the LB varieties. WD treatment also reduced fibre length and strength, with a more significant impact on LB varieties. In addition, WD significantly increased the relative protein content of cottonseed but decreased the relative oil content, leading to a decrease in seed vitality. Under WD irrigation, compared to seeds of LB varieties, the seeds of SB varieties have higher germination potential. Compared with LB varieties, SB varieties required less dry matter accumulation for boll maturation and produced more harvestable boll numbers, resulting in a smaller impact on yield and quality under WD irrigation. In general, SB varieties are more tolerant to WD stress and are expected to have a better performance in severe arid areas.
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Claims 18
Claim · model-written summary
Large and small boll cotton had similar boll volume and dry matter trends but different growth and accumulation rates under both irrigation conditions.
- Taxon
- Cotton
Gossypium hirsutumt0 - Material
- large boll (LB) and small boll (SB) varietiese0
- Outcome
- boll volume change and accumulation of boll dry mattere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“large boll (LB) and small boll (SB) varieties had a similar overall trend of boll volume change and accumulation of boll dry matter during boll development, but differed in the rate of dry matter accumulation and boll volume growth”
t0“Cotton”
Claim · model-written summary
Under well-watered irrigation, large boll cotton accumulated 29.17% more dry matter per boll than small boll cotton at 42 DPA.
- Taxon
- CottonGossypium hirsutumt0
- Material
- LBe0
- Treatment
- WW treatmente0
- Outcome
- dry matter accumulation per bolle0
- Direction
- highere0
- Value
- 29.17%e0
- Comparator
- SBe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under WW treatment, the dry matter accumulation per boll of LB was significantly higher than that of SB at 42 days postanthesis (DPA), with a difference of 29.17%.”
t0“Cotton”
Claim · model-written summary
Water deficit reduced cotton boll dry matter accumulation.
- Taxon
- CottonGossypium hirsutumt0
- Treatment
- WDe0
- Outcome
- dry matter accumulation of bollse0
- Direction
- reductione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“WD led to a reduction in dry matter accumulation of bolls”
t0“Cotton”
Claim · model-written summary
Water deficit decreased seed cotton dry matter accumulation in LB cotton by 20.45%.
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the dry matter accumulation in seed cotton and boll shell for LB varieties decreased by 20.45% and 3.24%, respectively, at 42 DPA”
t0“Cotton”
Claim · model-written summary
Water deficit decreased boll shell dry matter accumulation in LB cotton by 3.24%.
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the dry matter accumulation in seed cotton and boll shell for LB varieties decreased by 20.45% and 3.24%, respectively, at 42 DPA”
t0“Cotton”
Claim · model-written summary
Water deficit decreased seed cotton dry matter accumulation in SB cotton by 16.76%.
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The corresponding decrease in SB varieties was, respectively, 16.76% and 2.81%”
t0“Cotton”
e1“the dry matter accumulation in seed cotton and boll shell for LB varieties decreased by 20.45% and 3.24%, respectively, at 42 DPA”
Claim · model-written summary
Water deficit decreased boll shell dry matter accumulation in SB cotton by 2.81%.
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The corresponding decrease in SB varieties was, respectively, 16.76% and 2.81%”
t0“Cotton”
e1“the dry matter accumulation in seed cotton and boll shell for LB varieties decreased by 20.45% and 3.24%, respectively, at 42 DPA”
Claim · model-written summary
Small boll cotton had 36.28% more harvestable bolls per plant than large boll cotton under water deficit.
- Taxon
- CottonGossypium hirsutumt0
- Material
- SBe0
- Treatment
- WD irrigatione0
- Outcome
- harvestable boll numbers per plante0
- Direction
- highere0
- Value
- 36.28%e0
- Comparator
- LBe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the harvestable boll numbers per plant of SB varieties were 36.28% higher than that of LB varieties under WD irrigation”
t0“Cotton”
Claim · model-written summary
Small boll cotton lint yield was 1042.45 kg·ha −1, comparable to large boll varieties.
- Taxon
- CottonGossypium hirsutumt0
- Material
- SB varietiese0
- Outcome
- lint yielde0
- Direction
- comparablee0
- Value
- 1042.45 kg·ha −1e0
- Comparator
- LB varietiese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The lint yield of the SB varieties was 1042.45 kg·ha −1 and the seed cotton yield was 2459.67 kg·ha −1 , which were also comparable to those of the LB varieties.”
t0“Cotton”
Claim · model-written summary
Small boll cotton seed cotton yield was 2459.67 kg·ha −1, comparable to large boll varieties.
- Taxon
- CottonGossypium hirsutumt0
- Material
- SB varietiese0
- Outcome
- seed cotton yielde0
- Direction
- comparablee0
- Value
- 2459.67 kg·ha −1e0
- Comparator
- LB varietiese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The lint yield of the SB varieties was 1042.45 kg·ha −1 and the seed cotton yield was 2459.67 kg·ha −1 , which were also comparable to those of the LB varieties.”
t0“Cotton”
Claim · model-written summary
Water deficit reduced cotton fibre length and strength, with a greater effect in large boll varieties.
- Taxon
- CottonGossypium hirsutumt0
- Material
- LB varietiese0
- Treatment
- WD treatmente0
- Outcome
- fibre length and strengthe0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“WD treatment also reduced fibre length and strength, with a more significant impact on LB varieties.”
t0“Cotton”
Claim · model-written summary
Water deficit increased cottonseed relative protein content of cottonseed.
- Taxon
- CottonGossypium hirsutumt0
- Treatment
- WDe0
- Outcome
- relative protein content of cottonseede0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“WD significantly increased the relative protein content of cottonseed but decreased the relative oil content, leading to a decrease in seed vitality.”
t0“Cotton”
Claim · model-written summary
Water deficit decreased cottonseed relative oil content.
- Taxon
- CottonGossypium hirsutumt0
- Treatment
- WDe0
- Outcome
- relative oil contente0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“WD significantly increased the relative protein content of cottonseed but decreased the relative oil content, leading to a decrease in seed vitality.”
t0“Cotton”
Claim · model-written summary
Water deficit decrease cottonseed seed vitality.
- Taxon
- CottonGossypium hirsutumt0
- Treatment
- WDe0
- Outcome
- seed vitalitye0
- Direction
- decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“WD significantly increased the relative protein content of cottonseed but decreased the relative oil content, leading to a decrease in seed vitality.”
t0“Cotton”
Claim · model-written summary
Small boll cotton seeds had higher germination potential than large boll seeds under water deficit.
- Taxon
- CottonGossypium hirsutumt0
- Material
- SB varietiese0
- Treatment
- WD irrigatione0
- Outcome
- germination potentiale0
- Direction
- highere0
- Comparator
- LB varietiese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under WD irrigation, compared to seeds of LB varieties, the seeds of SB varieties have higher germination potential.”
t0“Cotton”
Claim · model-written summary
Small boll cotton required less dry matter accumulation for boll maturation than large boll cotton.
- Taxon
- CottonGossypium hirsutumt0
- Material
- SB varietiese0
- Outcome
- dry matter accumulation for boll maturatione0
- Direction
- lesse0
- Comparator
- LB varietiese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared with LB varieties, SB varieties required less dry matter accumulation for boll maturation and produced more harvestable boll numbers, resulting in a smaller impact on yield and quality under WD irrigation.”
t0“Cotton”
Claim · model-written summary
Water deficit had a smaller impact on yield and quality of small boll cotton than large boll cotton.
- Taxon
- CottonGossypium hirsutumt0
- Material
- SB varietiese0
- Treatment
- WD irrigatione0
- Outcome
- yield and qualitye0
- Direction
- smallere0
- Comparator
- LB varietiese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared with LB varieties, SB varieties required less dry matter accumulation for boll maturation and produced more harvestable boll numbers, resulting in a smaller impact on yield and quality under WD irrigation.”
t0“Cotton”
Claim · model-written summary
The authors conclude small boll cotton is more tolerant of water deficit and may perform better in severe arid areas.
- Taxon
- CottonGossypium hirsutumt0
- Material
- SB varietiese0
- Treatment
- WD stresse0
- Outcome
- better performance in severe arid arease0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“SB varieties are more tolerant to WD stress and are expected to have a better performance in severe arid areas.”
t0“Cotton”
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