Abstract
Abstract As maize is a chilling‐sensitive crop, low temperatures during the early stages of development can be injurious to crop growth and development. Prime mechanism behind chilling‐induced damage is oxidative stress. This study was undertaken to improve the chilling tolerance in hybrid maize by seed priming with KCl. For priming, seeds of the maize hybrid Hycorn 8288 were soaked in 50, 100 and 150 mg l −1 aerated solution of KCl for 24 h and then re‐dried close to original weight. Primed and untreated seeds were sown at 27 °C (optimal temperature) and at 15 °C (chilling stress) under controlled conditions. Seed priming improved the performance of maize under both normal and stress conditions. It was found that the chilling tolerance in maize is well associated with the enhanced capacity of the anti‐oxidative system. Priming with KCl significantly improved the chilling tolerance mainly by the activation of antioxidants including catalase, superoxide dismutase and ascorbate peroxidase enzymes. KCl treatments also improved the germination rate and time, root and shoot length, and fresh and dry weights of seedlings compared with control. Soluble sugars and α‐amylase activity determined as general metabolic indicators of stress were also improved by seed priming with KCl. Other possible bases of chilling tolerance in maize included maintenance of high tissue water contents, reduced electrolyte leakage and carbohydrate metabolism. Seed treatment with 100 mg l −1 KCl was the best treatment to improve the performance of hybrid maize both under normal and chilling stress conditions.
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Claims 8
Claim · model-written summary
KCl seed priming improved chilling tolerance in maize.
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Priming with KCl significantly improved the chilling tolerance”
t0“Maize”
Claim · model-written summary
KCl priming activated catalase, superoxide dismutase and ascorbate peroxidase.
- Treatment
- KClt0
- Gene
- catalase, superoxide dismutase and ascorbate peroxidase enzymese0
- Outcome
- activation of antioxidantse0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“activation of antioxidants including catalase, superoxide dismutase and ascorbate peroxidase enzymes”
t0“KCl Improves the Chilling Tolerance in Hybrid Maize”
Claim · model-written summary
KCl improved maize germination rate and time versus control.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“KCl treatments also improved the germination rate and time, root and shoot length, and fresh and dry weights of seedlings compared with control”
t0“Hybrid Maize”
Claim · model-written summary
KCl improved maize root and shoot length versus control.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“KCl treatments also improved the germination rate and time, root and shoot length, and fresh and dry weights of seedlings compared with control”
t0“Hybrid Maize”
Claim · model-written summary
KCl improved maize seedling fresh and dry weights versus control.
- Treatment
- KCl treatmentse0
- Outcome
- fresh and dry weights of seedlingse0
- Direction
- improvede0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“KCl treatments also improved the germination rate and time, root and shoot length, and fresh and dry weights of seedlings compared with control”
t0“Hybrid Maize”
Claim · model-written summary
KCl seed priming improved soluble sugars.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soluble sugars and α‐amylase activity determined as general metabolic indicators of stress were also improved by seed priming with KCl”
t0“Hybrid Maize”
Claim · model-written summary
KCl seed priming improved alpha amylase activity.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soluble sugars and α‐amylase activity determined as general metabolic indicators of stress were also improved by seed priming with KCl”
t0“Hybrid Maize”
Claim · model-written summary
A 100 mg per liter KCl treatment performed best under normal and chilling conditions.
- Treatment
- Seed treatment with 100 mg l −1 KCle0
- Outcome
- performance of hybrid maizee0
- Direction
- best treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seed treatment with 100 mg l −1 KCl was the best treatment to improve the performance of hybrid maize both under normal and chilling stress conditions”
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