Abstract
Branched nodal roots comprise the largest portion of the root system mass in Chloris gayana Kunth and the effects of high salinity on nodal root appearance and elongation rates were analysed in cv. Boma in greenhouse experiments. Roots from salt‐treated plants (0·2 mol l –1 NaCl) were smaller than controls, and accumulated higher concentrations of soluble sugars and reserve lipids. The number of nodal roots was reduced by the saline treatment. Leaf, tiller and nodal root appearance were delayed by salinity but the correlation among these processes was maintained, indicating that the developmental pattern was not altered by this level of salinity, only its rate. Initial nodal root growth rates varied as a function of plant size and were decreased by salinity only after 2 weeks of treatment. When shoots of non‐salinized plants were cut, a drastic reduction in nodal root appearance was observed, suggesting emerging leaves were stronger sinks than roots for available reserves. However, when the shoots of salt‐treated plants were cut, the already depressed root appearance rate was not further reduced. This suggests that, under salinity, alterations in root ability to metabolize reserves could have been more significant than reserve availability for controlling elongation.
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Claims 12
Claim · model-written summary
Branched nodal roots formed the largest share of root-system mass.
- Taxon
- Chloris gayana Kunth
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Chloris gayanae0 - Organ / stage
- Branched nodal rootse0
- Outcome
- largest portion of the root system masse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
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Verbatim
e0“Branched nodal roots comprise the largest portion of the root system mass in Chloris gayana Kunth”
Claim · model-written summary
Salt-treated roots were smaller than controls.
- Taxon
- Chloris gayana KunthChloris gayanae1
- Treatment
- salt‐treated plants (0·2 mol l –1 NaCl)e0
- Outcome
- Rootse0
- Direction
- smallere0
- Comparator
- controlse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Roots from salt‐treated plants (0·2 mol l –1 NaCl) were smaller than controls”
e1“Chloris gayana Kunth”
Claim · model-written summary
Salt-treated roots accumulated higher soluble sugars than controls.
- Taxon
- Chloris gayana KunthChloris gayanae1
- Treatment
- salt‐treated plants (0·2 mol l –1 NaCl)e0
- Outcome
- concentrations of soluble sugarse0
- Direction
- highere0
- Comparator
- controlse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Roots from salt‐treated plants (0·2 mol l –1 NaCl) were smaller than controls, and accumulated higher concentrations of soluble sugars and reserve lipids”
e1“Chloris gayana Kunth”
Claim · model-written summary
Salt-treated roots accumulated higher reserve lipids than controls.
- Taxon
- Chloris gayana KunthChloris gayanae1
- Treatment
- salt‐treated plants (0·2 mol l –1 NaCl)e0
- Outcome
- reserve lipidse0
- Direction
- highere0
- Comparator
- controlse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Roots from salt‐treated plants (0·2 mol l –1 NaCl) were smaller than controls, and accumulated higher concentrations of soluble sugars and reserve lipids”
e1“Chloris gayana Kunth”
Claim · model-written summary
Salinity reduced the number of nodal roots.
- Taxon
- Chloris gayana KunthChloris gayanae1
- Treatment
- saline treatmente0
- Outcome
- number of nodal rootse0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The number of nodal roots was reduced by the saline treatment.”
e1“Chloris gayana Kunth”
Claim · model-written summary
Salinity delayed leaf, tiller and nodal root appearance.
- Taxon
- Chloris gayana KunthChloris gayanae1
- Treatment
- salinitye0
- Outcome
- Leaf, tiller and nodal root appearancee0
- Direction
- delayede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Leaf, tiller and nodal root appearance were delayed by salinity”
e1“Chloris gayana Kunth”
Claim · model-written summary
The correlation among leaf, tiller and nodal-root appearance persisted under salinity.
- Taxon
- Chloris gayana KunthChloris gayanae2
- Treatment
- salinitye1
- Outcome
- correlation among these processes was maintainede0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the correlation among these processes was maintained”
e1“Leaf, tiller and nodal root appearance were delayed by salinity”
e2“Chloris gayana Kunth”
Claim · model-written summary
Initial nodal-root growth rates varied with plant size.
- Taxon
- Chloris gayana KunthChloris gayanae1
- Organ / stage
- nodal roote0
- Outcome
- Initial nodal root growth ratese0
- Qualifier
- plant sizee0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Initial nodal root growth rates varied as a function of plant size”
e1“Chloris gayana Kunth”
Claim · model-written summary
Salinity decreased initial nodal-root growth rates only after two weeks.
- Taxon
- Chloris gayana KunthChloris gayanae2
- Treatment
- salinitye0
- Outcome
- Initial nodal root growth ratese1
- Direction
- decreasede0
- Qualifier
- only after 2 weeks of treatmente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“were decreased by salinity only after 2 weeks of treatment”
e1“Initial nodal root growth rates varied as a function of plant size”
e2“Chloris gayana Kunth”
Claim · model-written summary
Cutting shoots of nonsalinized plants sharply reduced nodal-root appearance.
- Taxon
- Chloris gayana KunthChloris gayanae1
- Treatment
- shoots of non‐salinized plants were cute0
- Outcome
- nodal root appearancee0
- Direction
- drastic reductione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When shoots of non‐salinized plants were cut, a drastic reduction in nodal root appearance was observed”
e1“Chloris gayana Kunth”
Claim · model-written summary
Cutting shoots of salt-treated plants did not further reduce nodal-root appearance.
- Taxon
- Chloris gayana KunthChloris gayanae1
- Treatment
- shoots of salt‐treated plants were cute0
- Outcome
- root appearance ratee0
- Direction
- not further reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“when the shoots of salt‐treated plants were cut, the already depressed root appearance rate was not further reduced”
e1“Chloris gayana Kunth”
Claim · model-written summary
Under salinity, impaired root reserve metabolism may matter more for elongation than reserve availability.
- Taxon
- Chloris gayana KunthChloris gayanae1
- Outcome
- elongatione0
- Qualifier
- alterations in root ability to metabolize reservese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“under salinity, alterations in root ability to metabolize reserves could have been more significant than reserve availability for controlling elongation”
e1“Chloris gayana Kunth”
The same questions in other papers
sodium chloride · growth · Chloris gayanaPositive and negative results
1 paper in the same direction as this paper · 1 in the opposite direction
- positive
- negative
salinity · yield · Chloris gayanaResults agree
3 papers in the same direction as this paper
- negative
- negative
- negative
salinity · growth · Chloris gayanaResults agree
5 papers in the same direction as this paper
- negative
- negative
- negative
2 papers more in this group
See all 6 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.