Abstract
The effects of low growth temperature on the activities of photosystems (PS) 1 and 2 and antioxidant enzymes superoxide dismutase (SOD), ascorbate peroxidase (APX), glutathione reductase (GR) and catalase (CAT) in leaves of various maize inbred and hybrid genotypes (parental lines, F1 hybrids, F2 and backcross generations) were investigated. Considerable decrease of the PS 2 activity (contrary to the activity of PS 1) due to low-temperature stress was observed in the majority of genotypes/generations examined. The GR, APX and SOD activities markedly increased due to chilling, whereas the activity of CAT showed lesser changes which depended on the genotype/generation analysed. The higher susceptibility of the inbred line 2013 to low temperature was transmitted to further generations in case this line was used as the maternal parent. The intraspecific variability in photosynthetic and antioxidant parameters was caused particularly by the dominance (negative or positive), however, the level of the expression of this effect often changed after low-temperature stress and was probably the cause of the increase in the positive F1 heterosis observed in this case. Other genetic effects (e.g. the additivity, and particularly the additive or dominant maternal effects) were also found to contribute to the intraspecific variability in parameters analyzed. The dominant maternal effects possibly played an important role in maintaining positive heterosis in F2 generation.
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Claims 9
Claim · model-written summary
Low temperature decreased PS 2 activity in most maize genotypes and generations.
- Treatment
- low-temperature stresse0
- Outcome
- PS 2 activitye0
- Direction
- decreasee0
- Qualifier
- majority of genotypes/generations examinede0
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Considerable decrease of the PS 2 activity (contrary to the activity of PS 1) due to low-temperature stress was observed in the majority of genotypes/generations examined.”
t0“maize leaves”
Claim · model-written summary
PS 1 activity did not show the considerable decrease seen for PS 2.
- Outcome
- activity of PS 1e0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Considerable decrease of the PS 2 activity (contrary to the activity of PS 1) due to low-temperature stress”
t0“maize leaves”
Claim · model-written summary
Chilling markedly increased GR, APX and SOD activities.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The GR, APX and SOD activities markedly increased due to chilling”
t0“maize leaves”
Claim · model-written summary
CAT activity changed less, depending on genotype or generation.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the activity of CAT showed lesser changes which depended on the genotype/generation analysed.”
t0“maize leaves”
Claim · model-written summary
Low temperature susceptibility of inbred 2013 was transmitted when it was the maternal parent.
- Material
- inbred line 2013e0
- Outcome
- susceptibilitye0
- Direction
- highere0
- Qualifier
- this line was used as the maternal parente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The higher susceptibility of the inbred line 2013 to low temperature was transmitted to further generations in case this line was used as the maternal parent.”
t0“maize leaves”
Claim · model-written summary
Dominance was a particular cause of variability in photosynthetic and antioxidant parameters.
- Outcome
- intraspecific variability in photosynthetic and antioxidant parameterse0
- Qualifier
- dominance (negative or positive)e0
Not reportedMaterialGeneCompoundOrgan / stageInteractorTreatmentComparatorSettingDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The intraspecific variability in photosynthetic and antioxidant parameters was caused particularly by the dominance (negative or positive)”
t0“maize leaves”
Claim · model-written summary
Dominance expression changed after low temperature stress and probably increased positive F1 heterosis.
- Outcome
- positive F1 heterosise0
- Direction
- increasee0
- Qualifier
- level of the expression of this effect often changed after low-temperature stresse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the level of the expression of this effect often changed after low-temperature stress and was probably the cause of the increase in the positive F1 heterosis observed in this case.”
t0“maize leaves”
Claim · model-written summary
Additivity and maternal effects contributed to variability in measured parameters.
- Outcome
- intraspecific variability in parameters analyzede0
- Qualifier
- additivity, and particularly the additive or dominant maternal effectse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Other genetic effects (e.g. the additivity, and particularly the additive or dominant maternal effects) were also found to contribute to the intraspecific variability in parameters analyzed.”
t0“maize leaves”
Claim · model-written summary
Dominant maternal effects possibly maintained positive heterosis in F2.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The dominant maternal effects possibly played an important role in maintaining positive heterosis in F2 generation.”
t0“maize leaves”
The same questions in other papers
cold · physiology: antioxidant enzymes · Zea mays (maize)Results differ
8 papers in the same direction as this paper · 7 in the opposite direction
- no effect
- positive
- negative
12 papers more in this group
See all 16 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.