Abstract
Seedlings of cotton (Gossypium hirsutum L. cv. Acala SJ-2) were grown in modified Hoagland nutrient solution with various combinations of NaCl and CaCl2. Marking experiments and numerical analysis were conducted to characterize the spatial and temporal patterns of cotton root growth at varied Na/Ca ratios. At 1 mol m−3 Ca, 150 mol m−3 NaCl reduced overall root elongation rate to 60% of the control, while increasing Ca to 10 mol m−3 at the same NaCl concentration restored the elongation rate to 80% of the control. Analysis of the spatial distribution of elongation revealed that the presence of 150 mol m−3 NaCl in the medium shortened the growth zone by about 2 mm from the approximate 10 mm in the control and also reduced the relative elemental elongation rate (i.e. the longitudinal strain rate, defined as the derivatives of displacement velocity of a cellular particle with respect to position on root axis). Supply of 10 mol m−3 Ca at the high salt condition restored partially the relative elemental elongation rate, but not the length of the growth zone. Compared to the control, the growth trajectories showed that at 1 mol m−3 CaCl2 it took more time for a cellular particle to move through the growth zone at 150 mol m−3 NaCl, while at 10 mol m−3 CaCl it took less time and there was no difference between the NaCl treatments
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Claims 9
Claim · model-written summary
At 1 mol m−3 Ca, 150 mol m−3 NaCl reduced overall root elongation rate to 60% of the control.
- Taxon
- cotton
Gossypium hirsutumt0 - Treatment
- 150 mol m−3 NaCle1
- Outcome
- overall root elongation ratee1
- Direction
- reducede1
- Value
- 60%e1
- Qualifier
- At 1 mol m−3 Cae1
- Comparator
- the controle1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Primary Root of Cotton Seedlings”
e1“At 1 mol m−3 Ca, 150 mol m−3 NaCl reduced overall root elongation rate to 60% of the control”
Claim · model-written summary
Increasing Ca to 10 mol m−3 at 150 mol m−3 NaCl restored the root elongation rate to 80% of the control.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- increasing Ca to 10 mol m−3e2
- Outcome
- elongation ratee2
- Direction
- restorede2
- Value
- 80%e2
- Qualifier
- at the same NaCl concentratione2
- Comparator
- the controle2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Primary Root of Cotton Seedlings”
e2“while increasing Ca to 10 mol m−3 at the same NaCl concentration restored the elongation rate to 80% of the control”
Claim · model-written summary
150 mol m−3 NaCl shortened the root growth zone by about 2 mm compared with the control.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- 150 mol m−3 NaCl in the mediume3
- Outcome
- growth zonee3
- Direction
- shortenede3
- Value
- about 2 mme3
- Comparator
- the controle3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Primary Root of Cotton Seedlings”
e3“the presence of 150 mol m−3 NaCl in the medium shortened the growth zone by about 2 mm from the approximate 10 mm in the control”
Claim · model-written summary
150 mol m−3 NaCl reduced the relative elemental elongation rate of cotton roots compared with the control.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- 150 mol m−3 NaCle3
- Outcome
- relative elemental elongation ratee4
- Direction
- reducede4
- Comparator
- the controle3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Primary Root of Cotton Seedlings”
e3“the presence of 150 mol m−3 NaCl in the medium shortened the growth zone by about 2 mm from the approximate 10 mm in the control”
e4“also reduced the relative elemental elongation rate”
Claim · model-written summary
Supplying 10 mol m−3 Ca at the high salt condition partially restored the relative elemental elongation rate.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- 10 mol m−3 Cae5
- Outcome
- relative elemental elongation ratee5
- Direction
- restored partiallye5
- Comparator
- the high salt conditione5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Primary Root of Cotton Seedlings”
e5“Supply of 10 mol m−3 Ca at the high salt condition restored partially the relative elemental elongation rate”
Claim · model-written summary
Supplying 10 mol m−3 Ca at the high salt condition did not restore the length of the growth zone.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- 10 mol m−3 Cae5
- Outcome
- length of the growth zonee6
- Direction
- no_changeinferrede6
- Comparator
- the high salt conditione5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Primary Root of Cotton Seedlings”
e5“Supply of 10 mol m−3 Ca at the high salt condition restored partially the relative elemental elongation rate”
e6“but not the length of the growth zone”
Claim · model-written summary
At 1 mol m−3 CaCl2, 150 mol m−3 NaCl increased the time a cellular particle took to move through the growth zone compared with the control.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- 150 mol m−3 NaCle7
- Outcome
- time for a cellular particle to move through the growth zonee7
- Direction
- more timee7
- Qualifier
- at 1 mol m−3 CaCl2e7
- Comparator
- the controle7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Primary Root of Cotton Seedlings”
e7“Compared to the control, the growth trajectories showed that at 1 mol m−3 CaCl2 it took more time for a cellular particle to move through the growth zone at 150 mol m−3 NaCl”
Claim · model-written summary
At 10 mol m−3 CaCl, the time a cellular particle took to move through the growth zone was shorter than in the control.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- 10 mol m−3 CaCle1
- Outcome
- time for a cellular particle to move through the growth zonee0
- Direction
- less timee1
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Primary Root of Cotton Seedlings”
e0“Compared to the control, the growth trajectories showed that at 1 mol m−3 CaCl2 it took more time for a cellular particle to move through the growth zone at 150 mol m−3 NaCl”
e1“while at 10 mol m−3 CaCl it took less time”
Claim · model-written summary
The time a cellular particle took to move through the growth zone did not differ between NaCl treatments at 10 mol m−3 CaCl.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- NaCl treatmentse1
- Outcome
- time for a cellular particle to move through the growth zonee0
- Direction
- no_changeinferrede1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Primary Root of Cotton Seedlings”
e0“Compared to the control, the growth trajectories showed that at 1 mol m−3 CaCl2 it took more time for a cellular particle to move through the growth zone at 150 mol m−3 NaCl”
e1“there was no difference between the NaCl treatments”
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