Abstract
Generation of reactive oxygen species (ROS) and activities of antioxidant enzymes (catalase, peroxidase, ascorbate peroxidase) in pea (Pisum sativum L.) and soybean (Glycine max L.) under hypoxia (3–24 h) and high CO2 concentration in medium were studied. In sensitive to hypoxia pea seedlings, hypoxia enhanced markedly production of superoxide anion-radical, hydroperoxides, and especially hydrogen peroxide. In more tolerant soybean plants, these changes were less pronounced. During first hours of hypoxia, activity of lipoxygenase in plant cells increased. This allows a suggestion that this enzyme is involved in the processes of hydroperoxide accumulation in plant tissues under oxygen deficit. In pea and soybean plants, a correlation between tolerance to hypoxia, the rate of ROS generation, and antioxidant enzyme activities was established. During the first hours of hypoxia, the catalase activity in soybean plants increased stronger than in sensitive to hypoxia pea plants. At longer exposure to hypoxia (24 h), peroxidases started to play the higher role in cell defense against hypoxia, but only in soybean plants. The medium with the higher CO2 content induced higher changes in the processes of ROS accumulation and activities of lipoxygenase and antioxidant enzymes. This permits us to refer CO2, accumulated as a product of respiration in the cells, to low-molecular signal molecules switching on plant adaptation to hypoxic stress.
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Claims 8
Claim · model-written summary
Hypoxia markedly enhanced superoxide anion-radical, hydroperoxides, and especially hydrogen peroxide in pea seedlings.
- Taxon
- pea seedlings
Lathyrus oleraceuse0 - Treatment
- hypoxiae0
- Outcome
- production of superoxide anion-radical, hydroperoxides, and especially hydrogen peroxidee0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In sensitive to hypoxia pea seedlings, hypoxia enhanced markedly production of superoxide anion-radical, hydroperoxides, and especially hydrogen peroxide.”
Claim · model-written summary
The hypoxia-related changes were less pronounced in soybean than in pea.
- Taxon
- soybean plants
Glycine maxe0 - Outcome
- these changese0
- Direction
- less pronouncede0
- Comparator
- pea seedlingse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In more tolerant soybean plants, these changes were less pronounced.”
e1“In sensitive to hypoxia pea seedlings, hypoxia enhanced markedly production of superoxide anion-radical, hydroperoxides, and especially hydrogen peroxide.”
Claim · model-written summary
Lipoxygenase activity increased during the first hours of hypoxia.
- Taxon
- pea and soybean plantsGlycine maxLathyrus oleraceust0
- Treatment
- hypoxiae0
- Gene
- lipoxygenasee0
- Outcome
- activity of lipoxygenasee0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“During first hours of hypoxia, activity of lipoxygenase in plant cells increased.”
t0“pea and soybean plants”
Claim · model-written summary
ROS generation, antioxidant enzyme activities, and hypoxia tolerance were correlated in pea and soybean.
- Taxon
- pea and soybean plantsGlycine maxLathyrus oleraceuse0
- Treatment
- hypoxiae0
- Outcome
- tolerance to hypoxiae0
- Qualifier
- rate of ROS generation, and antioxidant enzyme activitiese0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In pea and soybean plants, a correlation between tolerance to hypoxia, the rate of ROS generation, and antioxidant enzyme activities was established.”
Claim · model-written summary
Catalase activity increased more strongly in soybean than in pea during the first hours of hypoxia.
- Taxon
- soybean plantsGlycine maxe0
- Treatment
- hypoxiae0
- Gene
- catalasee0
- Outcome
- catalase activitye0
- Direction
- increased strongere0
- Comparator
- pea plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“During the first hours of hypoxia, the catalase activity in soybean plants increased stronger than in sensitive to hypoxia pea plants.”
Claim · model-written summary
Peroxidases played a greater defensive role after 24 hours of hypoxia only in soybean.
- Taxon
- soybean plantsGlycine maxe0
- Gene
- peroxidasese0
- Outcome
- higher role in cell defense against hypoxiae0
- Direction
- highere0
- Qualifier
- 24 he0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At longer exposure to hypoxia (24 h), peroxidases started to play the higher role in cell defense against hypoxia, but only in soybean plants.”
Claim · model-written summary
Higher CO2 induced larger changes in ROS accumulation, lipoxygenase activity, and antioxidant enzyme activities.
- Taxon
- pea and soybean plantsGlycine maxLathyrus oleraceust0
- Treatment
- higher CO2 contente0
- Outcome
- ROS accumulation and activities of lipoxygenase and antioxidant enzymese0
- Direction
- higher changese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The medium with the higher CO2 content induced higher changes in the processes of ROS accumulation and activities of lipoxygenase and antioxidant enzymes.”
t0“pea and soybean plants”
Claim · model-written summary
The authors propose that accumulated CO2 signals plant adaptation to hypoxic stress.
- Taxon
- pea and soybean plantsGlycine maxLathyrus oleraceust0
- Compound
- CO2e0
- Outcome
- plant adaptation to hypoxic stresse0
- Qualifier
- low-molecular signal moleculese0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This permits us to refer CO2, accumulated as a product of respiration in the cells, to low-molecular signal molecules switching on plant adaptation to hypoxic stress.”
t0“pea and soybean plants”
The same questions in other papers
flooding · physiology: oxidative · Lathyrus oleraceus (pea)Positive and negative results
1 paper in the same direction as this paper · 1 in the opposite direction
- positive
- negative
flooding · physiology: antioxidant enzymes · Glycine max (soybean)Positive and negative results
1 paper in the same direction as this paper · 6 in the opposite direction
- negative
- negative
- negative
4 papers more in this group
See all 8 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.