Abstract
【Objective】The purpose of this study is to clarify the effects of nitric oxide(NO) on cotton seedlings growth and leaf physiological characteristics under NaCl stress.【Method】In a hydroponic experiment,two NaCl concentrations(50 mmol·L-1 and 100 mmol·L-1),four sodium nitroprusside(SNP) concentrations(0,50,100 and 200 μmol·L-1) for each NaCl level were designed,and at the same time a conventional culture was set.The growth and leaves physiological characteristics of cotton seedlings were measured after 10 days of treatment.【Result】The results showed that the treatment of NaCl stress inhibited the growth of cotton seedlings.The internodes of the cotton seedlings under NaCl stress were inhibited further by SNP which is an exogenous nitric oxide donor.The relative water content of cotton seedlings,especially the relative water content of the stem and root were decreased in SNP treatments under NaCl stress.The treatments of SNP added in 100 mmol·L-1 NaCl stress increased the contents of soluble protein and chlorophyll,and the ratio of chlorophyll a/b,the effects of 50 μmol·L-1 SNP was the best.Under both of the NaCl stresses,SNP improved the activities of SOD and POD significantly,while the activities of CAT decreased.【Conclusion】Under this experimental condition,exogenous nitric oxide inhibited internodes elongated,alleviated chlorophyll degradation,enhanced antioxidant capacity and improved leaves quality of cotton seedlings under NaCl stress.The SNP concentration from 50 μmol·L-1 to 100 μmol·L-1 could alleviate NaCl stress for cotton seedlings,the cotton seedlings under NaCl stress were seriously injured by high concentrations(200 μmol·L-1)of SNP.
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Claims 9
Claim · model-written summary
NaCl stress inhibited cotton seedling growth.
- Taxon
- cotton
Gossypium hirsutume0 - Treatment
- NaCl stresse0
- Outcome
- growthe0
- Direction
- inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the treatment of NaCl stress inhibited the growth of cotton seedlings”
Claim · model-written summary
SNP further inhibited internode elongation under salt stress.
- Taxon
- cottonGossypium hirsutume0
- Organ / stage
- internodese0
- Treatment
- SNPe0
- Outcome
- internodese0
- Direction
- inhibited furthere0
- Comparator
- NaCl stresse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The internodes of the cotton seedlings under NaCl stress were inhibited further by SNP which is an exogenous nitric oxide donor.”
Claim · model-written summary
SNP reduced cotton seedling relative water content under NaCl stress, especially in stems and roots.
- Taxon
- cottonGossypium hirsutume0
- Organ / stage
- stem and roote0
- Treatment
- SNP treatmentse0
- Outcome
- relative water contente0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The relative water content of cotton seedlings,especially the relative water content of the stem and root were decreased in SNP treatments under NaCl stress.”
Claim · model-written summary
SNP under 100 mmol·L-1 NaCl increased soluble protein and chlorophyll contents.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- SNP added in 100 mmol·L-1 NaCl stresse0
- Outcome
- contents of soluble protein and chlorophylle0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The treatments of SNP added in 100 mmol·L-1 NaCl stress increased the contents of soluble protein and chlorophyll”
t0“cotton”
Claim · model-written summary
SNP under 100 mmol·L-1 NaCl increased the chlorophyll a/b ratio, with 50 μmol·L-1 SNP best.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- SNP added in 100 mmol·L-1 NaCl stresse0
- Outcome
- ratio of chlorophyll a/be0
- Direction
- increasede0
- Qualifier
- 50 μmol·L-1 SNP was the beste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The treatments of SNP added in 100 mmol·L-1 NaCl stress increased the contents of soluble protein and chlorophyll,and the ratio of chlorophyll a/b,the effects of 50 μmol·L-1 SNP was the best.”
t0“cotton”
Claim · model-written summary
SNP significantly increased SOD and POD activity under both NaCl levels.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- SNPe0
- Gene
- SOD and PODe0
- Outcome
- activities of SOD and PODe0
- Direction
- improvede0
- Qualifier
- both of the NaCl stressese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under both of the NaCl stresses,SNP improved the activities of SOD and POD significantly”
t0“cotton”
Claim · model-written summary
SNP decreased CAT activity under both NaCl levels.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- SNPe0
- Gene
- CATe0
- Outcome
- activities of CATe0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under both of the NaCl stresses,SNP improved the activities of SOD and POD significantly,while the activities of CAT decreased.”
t0“cotton”
Claim · model-written summary
Authors concluded 50–100 μmol·L-1 SNP alleviated NaCl stress in cotton seedlings.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- SNP concentration from 50 μmol·L-1 to 100 μmol·L-1e0
- Outcome
- NaCl stresse0
- Direction
- alleviatee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The SNP concentration from 50 μmol·L-1 to 100 μmol·L-1 could alleviate NaCl stress for cotton seedlings”
Claim · model-written summary
At 200 μmol·L-1 SNP, salt-stressed cotton seedlings were seriously injured.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- high concentrations(200 μmol·L-1)of SNPe0
- Outcome
- cotton seedlings under NaCl stresse0
- Direction
- seriously injurede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the cotton seedlings under NaCl stress were seriously injured by high concentrations(200 μmol·L-1)of SNP”
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