Abstract
Cell wall-associated defence against zinc oxide nanoparticles (ZnO NPs) as well as nitro-oxidative signalling and its consequences in plants are poorly examined. Therefore, this study compares the effect of chemically synthetized ZnO NPs (~45 nm, 25 or 100 mg/L) on Brassica napus and Brassica juncea seedlings. The effects on root biomass and viability suggest that B. napus is more tolerant to ZnO NP exposure relative to B. juncea. This may be due to the lack of Zn ion accumulation in the roots, which is related to the increase in the amount of lignin, suberin, pectin and in peroxidase activity in the roots of B. napus. TEM results indicate that root cell walls of 25 mg/L ZnO NP-treated B. napus may bind Zn ions. Additionally, callose accumulation possibly contribute to root shortening in both Brassica species as the effect of 100 mg/L ZnO NPs. Further results suggest that in the roots of the relatively sensitive B. juncea the levels of superoxide radical, hydrogen peroxide, hydrogen sulfide, nitric oxide, peroxinitrite and S-nitrosoglutathione increased as the effect of high ZnO NP concentration meaning that ZnO NP intensifies nitro-oxidative signalling. In B. napus; however, reactive oxygen species signalling was intensified, but reactive nitrogen species signalling wasn't activated by ZnO NPs. Collectively, these results indicate that ZnO NPs induce cell wall remodeling which may be associated with ZnO NP tolerance. Furthermore, plant tolerance against ZnO NPs is associated rather with nitrosative signalling than oxidative modifications.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by-nc-nd. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 10
Claim · model-written summary
Root biomass and viability indicate that B. napus is more tolerant to ZnO NP exposure than B. juncea.
- Taxon
- B. napus
_Brassica_napus_-_Habit.jpg?width=60)
Brassica napuse1 - Treatment
- ZnO NP exposuree1
- Outcome
- more tolerant to ZnO NP exposuree1
- Qualifier
- root biomass and viabilitye1
- Comparator
- B. junceae1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Brassica_napus_-_Habit.jpg?width=500)
Verbatim
e1“The effects on root biomass and viability suggest that B. napus is more tolerant to ZnO NP exposure relative to B. juncea”
Claim · model-written summary
In B. napus roots, the lack of Zn ion accumulation is possibly related to increased lignin, suberin, pectin and peroxidase activity.
- Taxon
- B. napusBrassica napuse1
- Organ / stage
- rootse1
- Outcome
- amount of lignin, suberin, pectin and in peroxidase activitye1
- Direction
- increasee1
- Qualifier
- lack of Zn ion accumulation in the rootse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“This may be due to the lack of Zn ion accumulation in the roots, which is related to the increase in the amount of lignin, suberin, pectin and in peroxidase activity in the roots of B. napus”
Claim · model-written summary
TEM indicates that root cell walls of B. napus treated with 25 mg/L ZnO NPs may bind Zn ions.
- Taxon
- B. napusBrassica napuse1
- Organ / stage
- root cell wallse1
- Treatment
- 25 mg/L ZnO NPe1
- Outcome
- bind Zn ionse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“root cell walls of 25 mg/L ZnO NP-treated B. napus may bind Zn ions”
Claim · model-written summary
Callose accumulation possibly contributes to root shortening in both Brassica species under 100 mg/L ZnO NPs.
BrassicaOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“callose accumulation possibly contribute to root shortening in both Brassica species as the effect of 100 mg/L ZnO NPs”
Claim · model-written summary
In roots of B. juncea, superoxide radical, hydrogen peroxide and hydrogen sulfide levels increased under high ZnO NP concentration.
- Taxon
- B. juncea
Brassica junceae1 - Organ / stage
- rootse1
- Treatment
- high ZnO NP concentratione1
- Outcome
- levels of superoxide radical, hydrogen peroxide, hydrogen sulfidee1
- Direction
- increasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“in the roots of the relatively sensitive B. juncea the levels of superoxide radical, hydrogen peroxide, hydrogen sulfide, nitric oxide, peroxinitrite and S-nitrosoglutathione increased as the effect of high ZnO NP concentration”
Claim · model-written summary
In roots of B. juncea, nitric oxide, peroxinitrite and S-nitrosoglutathione levels increased under high ZnO NP concentration.
- Taxon
- B. junceaBrassica junceae1
- Organ / stage
- rootse1
- Treatment
- high ZnO NP concentratione1
- Outcome
- nitric oxide, peroxinitrite and S-nitrosoglutathionee1
- Direction
- increasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“in the roots of the relatively sensitive B. juncea the levels of superoxide radical, hydrogen peroxide, hydrogen sulfide, nitric oxide, peroxinitrite and S-nitrosoglutathione increased as the effect of high ZnO NP concentration”
Claim · model-written summary
In B. napus, reactive oxygen species signalling was intensified by ZnO NPs.
- Taxon
- B. napusBrassica napuse1
- Treatment
- ZnO NPse1
- Outcome
- reactive oxygen species signallinge1
- Direction
- intensifiede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“In B. napus; however, reactive oxygen species signalling was intensified, but reactive nitrogen species signalling wasn't activated by ZnO NPs”
Claim · model-written summary
In B. napus, reactive nitrogen species signalling was not activated by ZnO NPs.
- Taxon
- B. napusBrassica napuse1
- Treatment
- ZnO NPse1
- Outcome
- reactive nitrogen species signallinge1
- Direction
- wasn't activatede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“In B. napus; however, reactive oxygen species signalling was intensified, but reactive nitrogen species signalling wasn't activated by ZnO NPs”
Claim · model-written summary
ZnO nanoparticles induce cell wall remodeling in Brassica seedlings.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“ZnO nanoparticles induce cell wall remodeling”
e2“Brassica seedlings”
Claim · model-written summary
Plant tolerance against ZnO NPs is associated with nitrosative signalling rather than with oxidative modifications.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“plant tolerance against ZnO NPs is associated rather with nitrosative signalling than oxidative modifications”
e2“Brassica seedlings”
The same questions in other papers
nanoparticle · molecular: metabolites · Brassica napus (oilseed rape)Positive and negative results
8 in the opposite direction
- positive
- positive
- positive
5 papers more in this group
See all 9 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.