Abstract
The important plant growth regulator 5-aminolevulinic acid (ALA) could promote low-temperature stress tolerance of many plants; however, the underlying mechanisms remain to be elucidated. We investigated the effects of exogenously applied ALA on seedling morphology, antioxidant enzyme activity and photosynthetic capacity of maize (Zea mays L.) seedlings under low-temperature stress. Two cultivars, low-temperature-sensitive cv. Suiyu 13 (SY13) and low-temperature-tolerant cv. Zhengdan 958 (ZD958), were subjected to four treatments: low-temperature without ALA treatment, low-temperature after ALA treatment, normal temperature without ALA treatment, and normal temperature after ALA treatment. Plant morphological growth, proline content, antioxidant enzyme activity and photosynthetic capacity were determined. ALA treatment significantly decreased the inhibitory effects of low-temperature stress on seedling dry weight and increased proline accumulation under low temperatures in ZD958. Pre-application of ALA significantly improved superoxide dismutase and catalase activities in SY13 under low-temperature stress. Furthermore, treating maize seedlings with ALA resulted in significant enhancement of ribulose-1,5-bisphosphate (RuBP) carboxylase activity under low-temperature stress in both cultivars. Pre-treatment with ALA relieved the damage caused by low-temperature stress to maize seedlings, particularly in the low-temperature-sensitive cultivar. Therefore, ALA at appropriate concentrations may be used to prevent reductions in maize crop yield due to low-temperature stress.
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Claims 7
Claim · model-written summary
ALA decreased low-temperature inhibition of seedling dry weight in ZD958.
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“ALA treatment significantly decreased the inhibitory effects of low-temperature stress on seedling dry weight and increased proline accumulation under low temperatures in ZD958.”
t0“maize seedlings”
Claim · model-written summary
ALA increased proline accumulation under low temperature in ZD958.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“ALA treatment significantly decreased the inhibitory effects of low-temperature stress on seedling dry weight and increased proline accumulation under low temperatures in ZD958.”
t0“maize seedlings”
Claim · model-written summary
ALA improved superoxide dismutase activity in SY13 under low-temperature stress.
- Material
- SY13e0
- Treatment
- Pre-application of ALAe0
- Gene
- superoxide dismutasee0
- Outcome
- superoxide dismutasee0
- Direction
- improvede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Pre-application of ALA significantly improved superoxide dismutase and catalase activities in SY13 under low-temperature stress.”
t0“maize seedlings”
Claim · model-written summary
ALA improved catalase activity in SY13 under low-temperature stress.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Pre-application of ALA significantly improved superoxide dismutase and catalase activities in SY13 under low-temperature stress.”
t0“maize seedlings”
Claim · model-written summary
ALA enhanced RuBP carboxylase activity under low-temperature stress in both cultivars.
- Treatment
- ALAe0
- Gene
- ribulose-1,5-bisphosphate (RuBP) carboxylasee0
- Outcome
- ribulose-1,5-bisphosphate (RuBP) carboxylase activitye0
- Direction
- enhancemente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“treating maize seedlings with ALA resulted in significant enhancement of ribulose-1,5-bisphosphate (RuBP) carboxylase activity under low-temperature stress in both cultivars.”
Claim · model-written summary
ALA pretreatment relieved low-temperature damage, particularly in the sensitive cultivar.
- Treatment
- Pre-treatment with ALAe0
- Outcome
- damage caused by low-temperature stresse0
- Direction
- relievede0
- Qualifier
- particularly in the low-temperature-sensitive cultivare0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Pre-treatment with ALA relieved the damage caused by low-temperature stress to maize seedlings, particularly in the low-temperature-sensitive cultivar.”
Claim · model-written summary
Authors suggest appropriate ALA concentrations to prevent low-temperature yield reductions in maize.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“ALA at appropriate concentrations may be used to prevent reductions in maize crop yield due to low-temperature stress.”
The same questions in other papers
5-aminolevulinic acid · growth · Zea mays (maize)Positive and negative results
5 papers in the same direction as this paper · 1 in the opposite direction
- no effect
- positive
- positive
3 papers more in this group
See all 7 papers →5-aminolevulinic acid · physiology: osmolytes · Zea mays (maize)Results agree
1 paper in the same direction as this paper
- positive
5-aminolevulinic acid · physiology: enzyme activity · Zea mays (maize)Results agree
1 paper in the same direction as this paper
- positive
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.