Abstract
Abstract Cotton‐producing regions throughout the world often experience high night temperatures (HNTs), affecting flowering and yield in cotton ( Gossypium hirsutum ). The objective of this study was to quantify the effects of high nighttime temperatures on the physiological and biochemical characteristics of cotton during the floral bud and flowering stages. Growth chamber experiments were conducted in 2011–2012 and treatments included a control (day/night temperature of 32/24 °C) and two HNT treatments (32/29 °C from 8:00 pm to 12:00 am) for 3 weeks from the beginning of each phenological stage, i.e., first floral bud (B1) and first flower (F1). The results indicated that increased night temperatures (NTs) during the floral bud and flowering stages increased the rate of flower production per plant. However, no increase was observed in the final number of reproductive structures because the rate of floral abortion also increased for both treatments compared to the control. Additionally, the increase in night temperature during the floral bud stage reduced the sucrose content in the flower, resulting in decreased pollen viability and premature abortion of reproductive structures while the onset of flowering period was also delayed and lower accumulation of reproductive dry matter was observed. HNTs during the flowering stage reduced the number of seeds per locule and the number of seeds per boll. In general, higher than optimum NTs affected sucrose metabolism of the cotton flower and consequently its pollen viability. As a result the flowering period was delayed and a reduction in reproductive dry matter accumulation was observed due to premature abortion of reproductive structures. Finally, cotton is more sensitive to HNT at floral bud stage and this finding may be important to adjust cotton planting date, management and breeding.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 8
Claim · model-written summary
High night temperatures at floral bud and flowering stages increased flower production rate.
- Treatment
- increased night temperatures (NTs)e0
- Outcome
- rate of flower production per plante0
- Direction
- increasede0
- Comparator
- a control (day/night temperature of 32/24 °C)e1
Not reportedTaxon
Verbatim
e0“increased night temperatures (NTs) during the floral bud and flowering stages increased the rate of flower production per plant.”
e1“a control (day/night temperature of 32/24 °C)”
Claim · model-written summary
Final reproductive structure count did not increase because floral abortion rose under both high night temperature treatments.
- Taxon
- cotton
Gossypium hirsutumt0 - Treatment
- both treatmentse0
- Outcome
- final number of reproductive structurese0
- Direction
- no increasee0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“no increase was observed in the final number of reproductive structures because the rate of floral abortion also increased for both treatments compared to the control.”
t0“cotton”
Claim · model-written summary
High night temperature at floral bud stage reduced flower sucrose content.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- increase in night temperature during the floral bud stagee0
- Outcome
- sucrose content in the flowere0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the increase in night temperature during the floral bud stage reduced the sucrose content in the flower”
t0“cotton”
Claim · model-written summary
High night temperature at floral bud stage decreased pollen viability and caused premature abortion of reproductive structures.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- increase in night temperature during the floral bud stagee0
- Outcome
- pollen viability and premature abortion of reproductive structurese0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the increase in night temperature during the floral bud stage reduced the sucrose content in the flower, resulting in decreased pollen viability and premature abortion of reproductive structures”
t0“cotton”
Claim · model-written summary
High night temperature at floral bud stage delayed flowering onset.
- Taxon
- cottonGossypium hirsutumt0
- Outcome
- onset of flowering periode0
- Direction
- delayede0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the onset of flowering period was also delayed”
t0“cotton”
Claim · model-written summary
High night temperature at floral bud stage reduced reproductive dry matter accumulation.
- Taxon
- cottonGossypium hirsutumt0
- Outcome
- accumulation of reproductive dry mattere0
- Direction
- lowere0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“lower accumulation of reproductive dry matter was observed”
t0“cotton”
Claim · model-written summary
High night temperature during flowering reduced seeds per locule and seeds per boll.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- HNTs during the flowering stagee0
- Outcome
- number of seeds per locule and the number of seeds per bolle0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“HNTs during the flowering stage reduced the number of seeds per locule and the number of seeds per boll.”
t0“cotton”
Claim · model-written summary
Cotton was more sensitive to high night temperatures at floral bud stage.
- Taxon
- cottonGossypium hirsutume0
- Organ / stage
- floral bud stagee0
- Outcome
- sensitive to HNTe0
- Direction
- more sensitivee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“cotton is more sensitive to HNT at floral bud stage”
The same questions in other papers
stage · yield · Gossypium hirsutum (cotton)Positive and negative results
24 papers in the same direction as this paper · 38 in the opposite direction
- positive
- positive
- positive
59 papers more in this group
See all 63 papers →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.