Abstract
Abstract: Changes of superoxide(O 2) and hydrogen peroxide(H2O 2), malondialdehyde(MDA) contents and activities of enzymes involving cell defense in leaves of strawberry (Fragaria×ananassa Duch) plantlets under different time of low temperature stress were studied. With the increase of stress times, the rates of O2 generation and contents of H2O 2 increased to a certain degree and then decreased. The MDA contents and the relative conductivity fluctuated were increased during the treatment. The activities of antioxidant enzymes, such as superoxide dismutase(SOD), catalase(CAT), peroxidase(POD) and ascorbate peroxidase(APX) were gradually increased to a certain degree and then decreased. The results clearly suggested that low temperature stress triggered an increase of reactive oxygen species (ROS) and the early accumulation of ROS in plants might lead to the production of antioxidant defense system. If the stress were too strong, the defense system of plants could not remove the more production of ROS effectively and result in severely damage to plants or even death.
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Claims 7
Claim · model-written summary
With longer stress, O2 generation rate and H2O2 content in strawberry leaves rose to a certain degree and then fell.
- Taxon
- Strawberry
_single2.jpg?width=60)
Fragaria ×ananassat0 - Treatment
- stress timese0
- Outcome
- the rates of O2 generation and contents of H2O 2e0
- Direction
- increased to a certain degree and then decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_single2.jpg?width=500)
Verbatim
e0“With the increase of stress times, the rates of O2 generation and contents of H2O 2 increased to a certain degree and then decreased”
t0“Strawberry”
Claim · model-written summary
MDA contents and relative conductivity increased during the low temperature treatment.
- Taxon
- StrawberryFragaria ×ananassat0
- Outcome
- MDA contents and the relative conductivitye0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The MDA contents and the relative conductivity fluctuated were increased during the treatment”
t0“Strawberry”
Claim · model-written summary
Activities of SOD and CAT gradually rose to a certain degree and then fell under low temperature stress.
- Taxon
- StrawberryFragaria ×ananassat0
- Gene
- superoxide dismutase(SOD), catalase(CAT)e0
- Outcome
- activities of antioxidant enzymese0
- Direction
- gradually increased to a certain degree and then decreasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The activities of antioxidant enzymes, such as superoxide dismutase(SOD), catalase(CAT), peroxidase(POD) and ascorbate peroxidase(APX) were gradually increased to a certain degree and then decreased”
t0“Strawberry”
Claim · model-written summary
Activities of POD and APX gradually rose to a certain degree and then fell under low temperature stress.
- Taxon
- StrawberryFragaria ×ananassat0
- Gene
- peroxidase(POD) and ascorbate peroxidase(APX)e0
- Outcome
- activities of antioxidant enzymese0
- Direction
- gradually increased to a certain degree and then decreasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The activities of antioxidant enzymes, such as superoxide dismutase(SOD), catalase(CAT), peroxidase(POD) and ascorbate peroxidase(APX) were gradually increased to a certain degree and then decreased”
t0“Strawberry”
Claim · model-written summary
Low temperature stress triggered an increase of reactive oxygen species.
- Taxon
- StrawberryFragaria ×ananassat0
- Treatment
- low temperature stresse0
- Outcome
- reactive oxygen species (ROS)e0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“low temperature stress triggered an increase of reactive oxygen species (ROS)”
t0“Strawberry”
Claim · model-written summary
Early accumulation of ROS in plants might lead to production of the antioxidant defense system.
- Taxon
- plantsViridiplantaee0
- Compound
- ROSe0
- Outcome
- production of antioxidant defense systeme0
Verbatim
e0“the early accumulation of ROS in plants might lead to the production of antioxidant defense system”
Claim · model-written summary
If the stress is too strong, the plant defense system cannot remove the excess ROS effectively, resulting in severe damage or even death.
- Taxon
- plantsViridiplantaee0
- Compound
- ROSe0
- Outcome
- severely damage to plants or even deathe0
- Qualifier
- If the stress were too stronge0
Verbatim
e0“If the stress were too strong, the defense system of plants could not remove the more production of ROS effectively and result in severely damage to plants or even death”
The same questions in other papers
cold · physiology: oxidative · Fragaria x ananassa (strawberry)Positive and negative results
3 papers in the same direction as this paper · 3 in the opposite direction
- positive
- positive
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3 papers more in this group
See all 7 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.