Abstract
It has great significance to research salt tolerance mechanism for salt resistance breeding of sunflower.This paper studied the effect of different salt stress levels on seedlings′growth and physiological characteristics such as germination rate,leaf area,overground and underground biomass yield,malondialdehyde content,producing rate of oxygen free radicals,SOD activity,POD activity and CAT activity to five cytoplasmic male sterile lines by using pot experiment simulating 0.35% and 0.50% soil salinity.The result indicated that low salt stress had acceleration effect on seedling germination.Under moderate stress,seedling germination and growth were both suppressed and leaf relative conductivity increased.But at the same time SOD,POD and CAT activity increased significantly while O-·2 producing rate and MDA content showed no significant difference to control group.Strong reactive oxygen scavenging capacity is one of sunflower′s physiological mechanisms of salt-tolerance characteristics.Five self-selection sterile lines vary in salt tolerance from each other.
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Claims 10
Claim · model-written summary
Low salt stress accelerated seedling germination.
- Taxon
- sunflower
Helianthus annuust0 - Treatment
- low salt stresse0
- Outcome
- seedling germinatione0
- Direction
- acceleratione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“low salt stress had acceleration effect on seedling germination.”
t0“Sunflower Seedlings”
Claim · model-written summary
Moderate salt stress suppressed seedling germination and growth.
- Taxon
- sunflowerHelianthus annuust0
- Treatment
- moderate stresse0
- Outcome
- seedling germination and growthe0
- Direction
- suppressede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under moderate stress,seedling germination and growth were both suppressed”
t0“Sunflower Seedlings”
Claim · model-written summary
Moderate stress increased leaf relative conductivity.
- Taxon
- sunflowerHelianthus annuust0
- Treatment
- moderate stresse0
- Outcome
- leaf relative conductivitye0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under moderate stress,seedling germination and growth were both suppressed and leaf relative conductivity increased.”
t0“Sunflower Seedlings”
Claim · model-written summary
SOD activity increased significantly under moderate stress.
- Taxon
- sunflowerHelianthus annuust0
- Treatment
- moderate stresse0
- Gene
- SODe0
- Outcome
- SODe0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under moderate stress,seedling germination and growth were both suppressed and leaf relative conductivity increased.But at the same time SOD,POD and CAT activity increased significantly”
t0“Sunflower Seedlings”
Claim · model-written summary
POD activity increased significantly under moderate stress.
- Taxon
- sunflowerHelianthus annuust0
- Treatment
- moderate stresse0
- Gene
- PODe0
- Outcome
- PODe0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under moderate stress,seedling germination and growth were both suppressed and leaf relative conductivity increased.But at the same time SOD,POD and CAT activity increased significantly”
t0“Sunflower Seedlings”
Claim · model-written summary
CAT activity increased significantly under moderate stress.
- Taxon
- sunflowerHelianthus annuust0
- Treatment
- moderate stresse0
- Gene
- CATe0
- Outcome
- CAT activitye0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under moderate stress,seedling germination and growth were both suppressed and leaf relative conductivity increased.But at the same time SOD,POD and CAT activity increased significantly”
t0“Sunflower Seedlings”
Claim · model-written summary
Oxygen radical production did not differ significantly from control.
- Taxon
- sunflowerHelianthus annuust0
- Treatment
- moderate stresse0
- Outcome
- O-·2 producing ratee0
- Direction
- no significant differencee0
- Comparator
- control groupe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under moderate stress,seedling germination and growth were both suppressed and leaf relative conductivity increased.But at the same time SOD,POD and CAT activity increased significantly while O-·2 producing rate and MDA content showed no significant difference to control group.”
t0“Sunflower Seedlings”
Claim · model-written summary
MDA content did not differ significantly from control.
- Taxon
- sunflowerHelianthus annuust0
- Treatment
- moderate stresse0
- Outcome
- MDA contente0
- Direction
- no significant differencee0
- Comparator
- control groupe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under moderate stress,seedling germination and growth were both suppressed and leaf relative conductivity increased.But at the same time SOD,POD and CAT activity increased significantly while O-·2 producing rate and MDA content showed no significant difference to control group.”
t0“Sunflower Seedlings”
Claim · model-written summary
Reactive oxygen scavenging was interpreted as a salt tolerance mechanism.
- Taxon
- sunflowerHelianthus annuuse0
- Outcome
- salt-tolerance characteristicse0
- Qualifier
- Strong reactive oxygen scavenging capacitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Strong reactive oxygen scavenging capacity is one of sunflower′s physiological mechanisms of salt-tolerance characteristics.”
Claim · model-written summary
Five sterile lines varied in salt tolerance.
- Taxon
- sunflowerHelianthus annuust0
- Material
- Five self-selection sterile linese0
- Outcome
- salt tolerancee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Five self-selection sterile lines vary in salt tolerance from each other.”
t0“Sunflower Seedlings”
The same questions in other papers
salinity · growth · Helianthus annuus (common sunflower)Results differ
5 papers in the same direction as this paper · 47 in the opposite direction
- negative
- negative
- negative
49 papers more in this group
See all 53 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.