Abstract
An adequate supply of boron (B) is required for the optimal growth and development of cotton (Gossypium hirsutum L.) plants, but the low phloem mobility of B limits the possibilities of correcting B deficiency. There are indications that different cotton cultivars could have different responses to B deficiency. The differences in responses of cotton cultivars to B regarding photoassimilate production and transport were studied in a greenhouse experiment with nutrient solution. Treatments consisted of three cotton cultivars (FMT 701, DP 604BG and FMX 993) and five concentrations of B (0.0, 2.5, 5.0, 10.0 and 20.0 µmol L−1). Sampling began at the phenological stage B1 (first square) and continued for four weeks. The leaf area and the number of reproductive branches and structures decreased due to B deficiency. A higher level of abortion of reproductive structures was observed under B deficiency. Boron deficiency increased the internal CO2 concentration but decreased the transpiration rate, stomatal conductance and photosynthesis. Despite the decrease in photosynthesis, nonstructural carbohydrates accumulated in the leaves due to decreased export to bolls in B-deficient plants. The response to B deficiency is similar among cotton cultivars, which shows that the variability for this trait is low even for cultivars with different genetic backgrounds.
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Claims 8
Claim · model-written summary
Boron deficiency decreased cotton leaf area.
- Taxon
- cotton
Gossypium hirsutumt0 - Treatment
- B deficiencye0
- Outcome
- leaf areae0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The leaf area and the number of reproductive branches and structures decreased due to B deficiency.”
t0“cotton”
t1“cotton”
Claim · model-written summary
Boron deficiency decreased the number of cotton reproductive branches and structures.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- B deficiencye0
- Outcome
- number of reproductive branches and structurese0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The leaf area and the number of reproductive branches and structures decreased due to B deficiency.”
t0“cotton”
t1“cotton”
Claim · model-written summary
Boron deficiency increased abortion of cotton reproductive structures.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- B deficiencye0
- Outcome
- abortion of reproductive structurese0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A higher level of abortion of reproductive structures was observed under B deficiency.”
t0“cotton”
t1“cotton”
Claim · model-written summary
Boron deficiency increased internal CO2 concentration in cotton.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- Boron deficiencye0
- Outcome
- internal CO2 concentratione0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Boron deficiency increased the internal CO2 concentration”
t0“cotton”
t1“cotton”
Claim · model-written summary
Boron deficiency decreased cotton transpiration rate, stomatal conductance and photosynthesis.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- Boron deficiencye1
- Outcome
- transpiration rate, stomatal conductance and photosynthesise0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“decreased the transpiration rate, stomatal conductance and photosynthesis.”
t0“cotton”
t1“cotton”
e1“Boron deficiency increased the internal CO2 concentration”
Claim · model-written summary
Nonstructural carbohydrates accumulated in leaves of boron-deficient cotton.
- Taxon
- cottonGossypium hirsutumt0
- Organ / stage
- leavese0
- Treatment
- B-deficiente0
- Outcome
- nonstructural carbohydratese0
- Direction
- accumulatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“nonstructural carbohydrates accumulated in the leaves due to decreased export to bolls in B-deficient plants.”
t0“cotton”
t1“cotton”
Claim · model-written summary
Reduced export to bolls explains carbohydrate accumulation in boron-deficient cotton leaves.
- Taxon
- cottonGossypium hirsutumt0
- Organ / stage
- leavese0
- Outcome
- nonstructural carbohydrates accumulatede0
- Qualifier
- decreased export to bollse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“nonstructural carbohydrates accumulated in the leaves due to decreased export to bolls in B-deficient plants.”
t0“cotton”
t1“cotton”
Claim · model-written summary
Cotton cultivars showed similar responses to boron deficiency.
- Taxon
- cottonGossypium hirsutume0
- Outcome
- response to B deficiencye0
- Direction
- similare0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The response to B deficiency is similar among cotton cultivars”
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