Abstract
Abstract BACKGROUND The unique features of nanoparticles can improve the effectiveness of seed priming with metallic ions, boosting plant growth and the defense response. The current study aimed to evaluate the effects of nanopriming of maize ( Zea mays L.) seeds with chitosan nanoparticles containing copper ions (NPCu) on the growth and photosynthetic activity of non‐stressed seedlings, as well as on the germination and antioxidant response of seeds undergoing deterioration caused by high relative humidity and temperature. RESULTS Seed priming with bulk or nanoencapsulated Cu 2+ influenced the initial development of greenhouse‐grown maize seedlings, mainly by increasing shoot growth and photosynthetic electron transport, compared to the control. Chitosan nanoparticles without Cu (NP) induced minor morphophysiological responses. In the laboratory assay with stressed seeds, NPCu stood out for strongly increasing the activity of antioxidant enzymes. In contrast, priming with NP induced oxidative stress in maize seedlings. CONCLUSION Under normal growing conditions, Cu 2+ promoted the initial growth of maize seedlings regardless of the nanoencapsulation. In the stressful condition caused by the deterioration process, NPCu combined the properties of chitosan with the essentiality of Cu 2+ , promoting the enzymatic antioxidant response. © 2021 Society of Chemical Industry (SCI).
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Claims 4
Claim · model-written summary
Seed priming with bulk or nanoencapsulated Cu2+ increased maize shoot growth and photosynthetic electron transport compared with the control.
- Treatment
- Seed priming with bulk or nanoencapsulated Cu 2+e1
- Outcome
- shoot growth and photosynthetic electron transporte2
- Direction
- increasinge2
- Comparator
- controle2
- Setting
- greenhousee1
Zea maysOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“maize (Zea mays L.) seedlings”
e1“Seed priming with bulk or nanoencapsulated Cu 2+ influenced the initial development of greenhouse”
e2“mainly by increasing shoot growth and photosynthetic electron transport, compared to the control”
Claim · model-written summary
Chitosan nanoparticles without Cu induced minor morphophysiological responses in maize seedlings.
- Treatment
- Chitosan nanoparticles without Cu (NP)e3
- Outcome
- morphophysiological responsese3
- Qualifier
- minore3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“maize (Zea mays L.) seedlings”
e3“Chitosan nanoparticles without Cu (NP) induced minor morphophysiological responses”
Claim · model-written summary
In stressed seeds, NPCu strongly increased the activity of antioxidant enzymes in maize.
- Treatment
- NPCue4
- Outcome
- activity of antioxidant enzymese4
- Direction
- strongly increasinge4
- Setting
- laboratory assaye4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“maize (Zea mays L.) seedlings”
e4“In the laboratory assay with stressed seeds, NPCu stood out for strongly increasing the activity of antioxidant enzymes”
Claim · model-written summary
Priming with NP induced oxidative stress in maize seedlings.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“maize (Zea mays L.) seedlings”
e5“In contrast, priming with NP induced oxidative stress in maize seedlings”
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