Abstract
In this study, tomato ( Lycopersicon esculentum Mill.) plant seedlings were subjected to Na‐ or K‐salt stress and Na‐ or K‐alkali stress. The growth, photosynthesis, and concentrations of solutes and inorganic ions in dry samples of stressed seedlings were measured to identify the physiological adaptive mechanisms by which tomato plants tolerate alkali stresses. The results showed that alkali stresses (Na‐ and K‐alkali stresses) significantly inhibited growth and photosynthesis, and the inhibitory effects of K‐salt stress on photosynthesis were greater for Na‐salt stress. The ions accumulation and balance were closely related to types of salts which were applied to. Under Na‐salt stress, Na + , K + and Cl − were the main osmolytes in both the roots and leaves, whereas K‐salt stress decreased the contribution of Na + and increased the contribution of K + . In the stems, the contribution of NO 3 − increased under all stresses. Compared to salt stresses, the alkali stresses decreased the contribution of Cl − and increased the contribution of organic acids (OAs) in the stems and leaves. However, the roots revealed a different mechanism of ion accumulation and governing ionic balance. In addition to Na + , K + and OAs, the contributions of Ca 2+ and Mg 2+ should not be ignored. Although K and Na possess similar atomic characteristic, consisting with osmotic or high‐pH stress, they showed a distinct effect on plant photosynthesis and ion accumulation.
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Claims 10
Claim · model-written summary
Alkali stresses significantly inhibited growth.
- Taxon
- Tomato
Solanum lycopersicumt0 - Treatment
- alkali stresses (Na‐ and K‐alkali stresses)e0
- Outcome
- growthe0
- Direction
- inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“alkali stresses (Na‐ and K‐alkali stresses) significantly inhibited growth and photosynthesis”
t0“Tomato Plant”
Claim · model-written summary
Alkali stresses significantly inhibited photosynthesis.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- alkali stresses (Na‐ and K‐alkali stresses)e0
- Outcome
- photosynthesise0
- Direction
- inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“alkali stresses (Na‐ and K‐alkali stresses) significantly inhibited growth and photosynthesis”
t0“Tomato Plant”
Claim · model-written summary
Potassium salt inhibited photosynthesis more than sodium salt.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- K‐salt stresse0
- Outcome
- photosynthesise0
- Direction
- greatere0
- Comparator
- Na‐salt stresse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the inhibitory effects of K‐salt stress on photosynthesis were greater for Na‐salt stress.”
t0“Tomato Plant”
Claim · model-written summary
Sodium, potassium and chloride were main osmolytes in roots and leaves under sodium salt stress.
- Taxon
- TomatoSolanum lycopersicumt0
- Organ / stage
- roots and leavese0
- Treatment
- Na‐salt stresse0
- Outcome
- Na + , K + and Cl − were the main osmolytese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under Na‐salt stress, Na + , K + and Cl − were the main osmolytes in both the roots and leaves”
t0“Tomato Plant”
Claim · model-written summary
Potassium salt decreased the contribution of sodium.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- K‐salt stresse0
- Outcome
- contribution of Na +e0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“K‐salt stress decreased the contribution of Na + and increased the contribution of K +”
t0“Tomato Plant”
Claim · model-written summary
Potassium salt increased the contribution of potassium.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- K‐salt stresse0
- Outcome
- contribution of K +e0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“K‐salt stress decreased the contribution of Na + and increased the contribution of K +”
t0“Tomato Plant”
Claim · model-written summary
All stresses increased the nitrate contribution in stems.
- Taxon
- TomatoSolanum lycopersicumt0
- Organ / stage
- stemse0
- Treatment
- all stressese0
- Outcome
- contribution of NO 3 −e0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the stems, the contribution of NO 3 − increased under all stresses.”
t0“Tomato Plant”
Claim · model-written summary
Alkali stresses decreased chloride contribution relative to salt stresses.
- Taxon
- TomatoSolanum lycopersicumt0
- Organ / stage
- stems and leavese0
- Treatment
- alkali stressese0
- Outcome
- contribution of Cl −e0
- Direction
- decreasede0
- Comparator
- salt stressese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared to salt stresses, the alkali stresses decreased the contribution of Cl − and increased the contribution of organic acids (OAs) in the stems and leaves.”
t0“Tomato Plant”
Claim · model-written summary
Alkali stresses increased organic acid contribution relative to salt stresses.
- Taxon
- TomatoSolanum lycopersicumt0
- Organ / stage
- stems and leavese0
- Treatment
- alkali stressese0
- Outcome
- contribution of organic acids (OAs)e0
- Direction
- increasede0
- Comparator
- salt stressese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared to salt stresses, the alkali stresses decreased the contribution of Cl − and increased the contribution of organic acids (OAs) in the stems and leaves.”
t0“Tomato Plant”
Claim · model-written summary
Root ion balance also involved calcium and magnesium.
- Taxon
- TomatoSolanum lycopersicumt0
- Organ / stage
- rootse1
- Outcome
- contributions of Ca 2+ and Mg 2+e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In addition to Na + , K + and OAs, the contributions of Ca 2+ and Mg 2+ should not be ignored.”
t0“Tomato Plant”
e1“the roots revealed a different mechanism of ion accumulation and governing ionic balance”
The same questions in other papers
alkalinity · growth · Solanum lycopersicum (tomato)Positive and negative results
6 papers in the same direction as this paper · 5 in the opposite direction
- positive
- positive
- positive
8 papers more in this group
See all 12 papers →alkalinity · physiology: photosynthesis · Solanum lycopersicum (tomato)Results agree
1 paper in the same direction as this paper
- 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.