Abstract
This study focused on determining the phytotoxic mechanism of copper oxide nanoparticles (CuO-NPs); destroying chloroplasts, plastoglobules and starch granules in spring barley (Hordeum sativum distichum) leaves.Recently, plastoglobule emerged as an important role player in chloroplast lipid metabolism operating as a thylakoid microdomain for metabolite synthesis, repair, and disposal.In the past few decades, application of NPs in agriculture has increased drastically which imposed the threat on crops by damaging xylem vessels and photosynthetic apparatus.The study was performed on spring barley grown in a hydroponic condition, supplemented with a high concentration of CuO-NPs to observe the toxicity on the ultrastructure of chloroplasts, plastoglobules and starch granules.The ultrathin cross sections of spring barley leaves revealed that the NPs decreased the counts of plastoglobule and starch granule on chloroplast.However, the size of plastoglobule and chloroplast increased in comparison to control.In addition, swollen starch granules and scattered thylakoids were also found.This is the first detailed study of NPs toxicity on the crop plants.The results indicated that the chloroplast could be as one of the important characteristics in the evaluation of NPs toxicity on plants.
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Claims 4
Claim · model-written summary
CuO nanoparticles decreased the counts of plastoglobules and starch granules on chloroplasts.
- Taxon
- Spring Barley
.jpg?width=60)
Hordeum vulgaret0 - Organ / stage
- chloroplaste2
- Treatment
- high concentration of CuO-NPse1
- Outcome
- counts of plastoglobule and starch granulee2
- Direction
- decreasede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
t0“Spring Barley (Hordeum sativum)”
e1“supplemented with a high concentration of CuO-NPs”
e2“the NPs decreased the counts of plastoglobule and starch granule on chloroplast”
Claim · model-written summary
CuO nanoparticles increased the size of plastoglobules and chloroplasts compared to control.
- Taxon
- Spring BarleyHordeum vulgaret0
- Treatment
- high concentration of CuO-NPse1
- Outcome
- size of plastoglobule and chloroplaste3
- Direction
- increasede3
- Comparator
- controle3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Spring Barley (Hordeum sativum)”
e1“supplemented with a high concentration of CuO-NPs”
e3“the size of plastoglobule and chloroplast increased in comparison to control”
Claim · model-written summary
Swollen starch granules and scattered thylakoids were found in CuO-treated leaves.
- Taxon
- Spring BarleyHordeum vulgaret0
- Outcome
- swollen starch granules and scattered thylakoidse4
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Spring Barley (Hordeum sativum)”
e4“swollen starch granules and scattered thylakoids were also found”
Claim · model-written summary
Chloroplast characteristics could be an important indicator in the evaluation of NP toxicity on plants.
- Taxon
- Spring BarleyHordeum vulgaret0
- Outcome
- the evaluation of NPs toxicity on plantse5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Spring Barley (Hordeum sativum)”
e5“the chloroplast could be as one of the important characteristics in the evaluation of NPs toxicity on plants”
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See all 35 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.