Abstract
The sweet potato(Ipomoea batatas Lam.) variety ‘Xushu 22' was used in this study. The effects of different concentration of NaCl on seedling root growth, leaf antioxidant capacity, osmotic adjustment substance content, photosynthetic gas exchange parameters, fl uorescence parameters, ion content of leaves, and the alleviatory effect of different concentrations of Ca2+ on 300 mmol·L-1 NaCl stress were analyzed. The results showed that the seedling root growth, the relative conductivity and MDA content of leaves were less affected under low concentrations(50 and 100 mmol·L-1) of NaCl. With the increasing of salinity, the superoxide dismutase(SOD) activity was increased fi rstly and decreased thereafter, the proline and soluble sugar contents increased, the Pn, Tr, Gs, Fv/Fm, RC/CS0, TR0/CS0, ET0/CS0 and ΦE0 of leaves decreased, while the ΦD0 of leaves increased. The leaf Na+ content was increased, but the K+, Ca2+ and K+/Na+ decreased. Under high concentration(300 mmol·L-1) of NaCl, the sweet potato seedling motebolism was signifi cantly inhibited. Interestingly, it was found that application of appropriate exogenous Ca2+ could significantly abate the poison of NaCl stress in sweet potato seedlings, and 12 mmol·L-1 Ca2+ had the best abating effect, which signifi cantly promoted the root growth, osmoregulation ability of sweet potato seedlings, reduced the membrane lipid oxidation, and kept higher values of Fv/Fm, RC/CS0, TR0/CS0, ET0/CS0, ΦE0 but lower ΦD0 in sweet potato leaves under salt stress. In turn, photosynthesis and transpiration were improved. These observations suggested that the application of exogenous Ca2+ was an effective method to improve the salt tolerance of sweet potato.
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Claims 17
Claim · model-written summary
Low NaCl concentrations (50 and 100 mmol·L-1) left seedling root growth, relative conductivity and leaf MDA content less affected.
- Taxon
- sweet potato
_Flower.jpg?width=60)
Ipomoea batatase0 - Treatment
- low concentrations(50 and 100 mmol·L-1) of NaCle1
- Outcome
- seedling root growth, the relative conductivity and MDA content of leavese1
- Direction
- less affectede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Flower.jpg?width=500)
Verbatim
e0“The sweet potato(Ipomoea batatas Lam.) variety ‘Xushu 22' was used in this study”
e1“the seedling root growth, the relative conductivity and MDA content of leaves were less affected under low concentrations(50 and 100 mmol·L-1) of NaCl”
Claim · model-written summary
Increasing salinity raised leaf superoxide dismutase (SOD) activity first and then lowered it.
- Taxon
- sweet potatoIpomoea batatase0
- Treatment
- increasing of salinitye1
- Outcome
- superoxide dismutase(SOD) activitye2
- Direction
- increased fi rstly and decreased thereaftere2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The sweet potato(Ipomoea batatas Lam.) variety ‘Xushu 22' was used in this study”
e1“With the increasing of salinity”
e2“the superoxide dismutase(SOD) activity was increased fi rstly and decreased thereafter”
Claim · model-written summary
Increasing salinity raised leaf proline and soluble sugar contents.
- Taxon
- sweet potatoIpomoea batatase0
- Treatment
- increasing of salinitye1
- Outcome
- proline and soluble sugar contentse2
- Direction
- increasede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The sweet potato(Ipomoea batatas Lam.) variety ‘Xushu 22' was used in this study”
e1“With the increasing of salinity”
e2“the proline and soluble sugar contents increased”
Claim · model-written summary
Increasing salinity decreased leaf Pn, Tr and Gs.
- Taxon
- sweet potatoIpomoea batatase0
- Treatment
- increasing of salinitye1
- Outcome
- Pn, Tr, Gse2
- Direction
- decreasede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The sweet potato(Ipomoea batatas Lam.) variety ‘Xushu 22' was used in this study”
e1“With the increasing of salinity”
e2“the Pn, Tr, Gs, Fv/Fm, RC/CS0, TR0/CS0, ET0/CS0 and ΦE0 of leaves decreased”
Claim · model-written summary
Increasing salinity decreased leaf Fv/Fm, RC/CS0 and TR0/CS0.
- Taxon
- sweet potatoIpomoea batatase0
- Treatment
- increasing of salinitye1
- Outcome
- Fv/Fm, RC/CS0, TR0/CS0e2
- Direction
- decreasede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The sweet potato(Ipomoea batatas Lam.) variety ‘Xushu 22' was used in this study”
e1“With the increasing of salinity”
e2“the Pn, Tr, Gs, Fv/Fm, RC/CS0, TR0/CS0, ET0/CS0 and ΦE0 of leaves decreased”
Claim · model-written summary
Increasing salinity decreased leaf ET0/CS0 and ΦE0.
- Taxon
- sweet potatoIpomoea batatase0
- Treatment
- increasing of salinitye1
- Outcome
- ET0/CS0 and ΦE0e2
- Direction
- decreasede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The sweet potato(Ipomoea batatas Lam.) variety ‘Xushu 22' was used in this study”
e1“With the increasing of salinity”
e2“the Pn, Tr, Gs, Fv/Fm, RC/CS0, TR0/CS0, ET0/CS0 and ΦE0 of leaves decreased”
Claim · model-written summary
Increasing salinity increased leaf ΦD0.
- Taxon
- sweet potatoIpomoea batatase0
- Treatment
- increasing of salinitye1
- Outcome
- ΦD0 of leavese2
- Direction
- increasede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The sweet potato(Ipomoea batatas Lam.) variety ‘Xushu 22' was used in this study”
e1“With the increasing of salinity”
e2“while the ΦD0 of leaves increased”
Claim · model-written summary
Increasing salinity increased leaf Na+ content.
- Taxon
- sweet potatoIpomoea batatase0
- Treatment
- increasing of salinitye1
- Outcome
- leaf Na+ contente2
- Direction
- increasede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The sweet potato(Ipomoea batatas Lam.) variety ‘Xushu 22' was used in this study”
e1“With the increasing of salinity”
e2“The leaf Na+ content was increased”
Claim · model-written summary
Increasing salinity decreased leaf K+, Ca2+ and K+/Na+.
- Taxon
- sweet potatoIpomoea batatase0
- Treatment
- increasing of salinitye1
- Outcome
- K+, Ca2+ and K+/Na+e2
- Direction
- decreasede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The sweet potato(Ipomoea batatas Lam.) variety ‘Xushu 22' was used in this study”
e1“With the increasing of salinity”
e2“but the K+, Ca2+ and K+/Na+ decreased”
Claim · model-written summary
Under 300 mmol·L-1 NaCl, seedling metabolism of sweet potato was significantly inhibited.
- Taxon
- sweet potatoIpomoea batatase1
- Treatment
- high concentration(300 mmol·L-1) of NaCle1
- Outcome
- seedling motebolisme1
- Direction
- inhibitede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Under high concentration(300 mmol·L-1) of NaCl, the sweet potato seedling motebolism was signifi cantly inhibited”
Claim · model-written summary
Exogenous Ca2+ at 12 mmol·L-1 significantly promoted seedling root growth and osmoregulation ability under NaCl stress.
- Taxon
- sweet potatoIpomoea batatase1
- Treatment
- 12 mmol·L-1 Ca2+e1
- Outcome
- root growth, osmoregulation abilitye1
- Direction
- promotede1
- Qualifier
- 300 mmol·L-1 NaCl stresse2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“12 mmol·L-1 Ca2+ had the best abating effect, which signifi cantly promoted the root growth, osmoregulation ability of sweet potato seedlings”
e2“the alleviatory effect of different concentrations of Ca2+ on 300 mmol·L-1 NaCl stress were analyzed”
Claim · model-written summary
Exogenous Ca2+ at 12 mmol·L-1 reduced membrane lipid oxidation in salt-stressed seedlings.
- Taxon
- sweet potatoIpomoea batatase1
- Treatment
- 12 mmol·L-1 Ca2+e1
- Outcome
- membrane lipid oxidatione2
- Direction
- reducede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“12 mmol·L-1 Ca2+ had the best abating effect, which signifi cantly promoted the root growth, osmoregulation ability of sweet potato seedlings”
e2“reduced the membrane lipid oxidation”
Claim · model-written summary
Exogenous Ca2+ at 12 mmol·L-1 kept higher Fv/Fm, RC/CS0 and TR0/CS0 in salt-stressed leaves.
- Taxon
- sweet potatoIpomoea batatase2
- Treatment
- 12 mmol·L-1 Ca2+e1
- Outcome
- Fv/Fm, RC/CS0, TR0/CS0e2
- Direction
- kept higher valuese2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“12 mmol·L-1 Ca2+ had the best abating effect, which signifi cantly promoted the root growth, osmoregulation ability of sweet potato seedlings”
e2“kept higher values of Fv/Fm, RC/CS0, TR0/CS0, ET0/CS0, ΦE0 but lower ΦD0 in sweet potato leaves under salt stress”
Claim · model-written summary
Exogenous Ca2+ at 12 mmol·L-1 kept higher ET0/CS0 and ΦE0 in salt-stressed leaves.
- Taxon
- sweet potatoIpomoea batatase2
- Treatment
- 12 mmol·L-1 Ca2+e1
- Outcome
- ET0/CS0, ΦE0e2
- Direction
- kept higher valuese2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“12 mmol·L-1 Ca2+ had the best abating effect, which signifi cantly promoted the root growth, osmoregulation ability of sweet potato seedlings”
e2“kept higher values of Fv/Fm, RC/CS0, TR0/CS0, ET0/CS0, ΦE0 but lower ΦD0 in sweet potato leaves under salt stress”
Claim · model-written summary
Exogenous Ca2+ at 12 mmol·L-1 lowered ΦD0 in salt-stressed leaves.
- Taxon
- sweet potatoIpomoea batatase2
- Treatment
- 12 mmol·L-1 Ca2+e1
- Outcome
- ΦD0e2
- Direction
- lowere2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“12 mmol·L-1 Ca2+ had the best abating effect, which signifi cantly promoted the root growth, osmoregulation ability of sweet potato seedlings”
e2“kept higher values of Fv/Fm, RC/CS0, TR0/CS0, ET0/CS0, ΦE0 but lower ΦD0 in sweet potato leaves under salt stress”
Claim · model-written summary
Application of exogenous Ca2+ under NaCl stress improved photosynthesis and transpiration.
- Taxon
- sweet potatoIpomoea batatase1
- Treatment
- application of appropriate exogenous Ca2+e1
- Outcome
- photosynthesis and transpiratione2
- Direction
- improvede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“application of appropriate exogenous Ca2+ could significantly abate the poison of NaCl stress in sweet potato seedlings”
e2“In turn, photosynthesis and transpiration were improved”
Claim · model-written summary
Exogenous Ca2+ application is an effective method to improve salt tolerance of sweet potato (authors’ conclusion).
- Taxon
- sweet potatoIpomoea batatase1
- Treatment
- application of exogenous Ca2+e1
- Outcome
- salt tolerancee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“the application of exogenous Ca2+ was an effective method to improve the salt tolerance of sweet potato”
The same questions in other papers
sodium chloride · physiology: oxidative · Ipomoea batatas (sweet potato)Positive and negative results
1 in the opposite direction
- negative
salinity · physiology: osmolytes · Ipomoea batatas (sweet potato)Positive and negative results
1 in the opposite direction
- negative
salinity · physiology: ion balance · Ipomoea batatas (sweet potato)Results agree
1 paper in the same direction as this paper
- negative
salinity · physiology: photosynthesis · Ipomoea batatas (sweet potato)Results agree
2 papers in the same direction as this paper
- negative
- negative
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.