Abstract
Plant pathogens including fungi and bacteria cause many of the most serious crop diseases. The plant innate immune response is triggered upon recognition of microbe-associated molecular patterns (MAMPs) such as flagellin22 and peptidoglycan. To date, very little is known of MAMP-mediated responses in roots. Root border cells are cells that originate from root caps and are released individually into the rhizosphere. Root tips of Arabidopsis (Arabidopsis thaliana) and flax (Linum usitatissimum) release cells known as "border-like cells." Whereas root border cells of pea (Pisum sativum) are clearly involved in defense against fungal pathogens, the function of border-like cells remains to be established. In this study, we have investigated the responses of root border-like cells of Arabidopsis and flax to flagellin22 and peptidoglycan. We found that both MAMPs triggered a rapid oxidative burst in root border-like cells of both species. The production of reactive oxygen species was accompanied by modifications in the cell wall distribution of extensin epitopes. Extensins are hydroxyproline-rich glycoproteins that can be cross linked by hydrogen peroxide to enhance the mechanical strength of the cell wall. In addition, both MAMPs also caused deposition of callose, a well-known marker of MAMP-elicited defense. Furthermore, flagellin22 induced the overexpression of genes involved in the plant immune response in root border-like cells of Arabidopsis. Our findings demonstrate that root border-like cells of flax and Arabidopsis are able to perceive an elicitation and activate defense responses. We also show that cell wall extensin is involved in the innate immunity response of root border-like cells.
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Claims 5
Claim · model-written summary
Both MAMPs, flagellin22 and peptidoglycan, triggered a rapid oxidative burst in root border-like cells of both Arabidopsis and flax.
- Taxon
- Arabidopsis and Flax
Arabidopsis
Linum usitatissimumt0 - Organ / stage
- root border-like cellse0
- Treatment
- both MAMPse0
- Outcome
- rapid oxidative burste0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Root Border-Like Cells of Arabidopsis and Flax”
e0“We found that both MAMPs triggered a rapid oxidative burst in root border-like cells of both species”
Claim · model-written summary
Reactive oxygen species production in the border-like cells was accompanied by modifications in the cell wall distribution of extensin epitopes.
- Taxon
- Arabidopsis and FlaxArabidopsisLinum usitatissimumt0
- Outcome
- modifications in the cell wall distribution of extensin epitopese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Root Border-Like Cells of Arabidopsis and Flax”
e0“The production of reactive oxygen species was accompanied by modifications in the cell wall distribution of extensin epitopes”
Claim · model-written summary
Both MAMPs also caused deposition of callose in the border-like cells.
- Taxon
- Arabidopsis and FlaxArabidopsisLinum usitatissimumt0
- Treatment
- both MAMPse0
- Outcome
- deposition of callosee0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Root Border-Like Cells of Arabidopsis and Flax”
e0“both MAMPs also caused deposition of callose”
Claim · model-written summary
Flagellin22 induced overexpression of genes involved in the plant immune response in root border-like cells of Arabidopsis.
- Taxon
- ArabidopsisArabidopsise0
- Organ / stage
- root border-like cellse0
- Treatment
- flagellin22e0
- Outcome
- genes involved in the plant immune responsee0
- Direction
- overexpressione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“flagellin22 induced the overexpression of genes involved in the plant immune response in root border-like cells of Arabidopsis”
Claim · model-written summary
Cell wall extensin is involved in the innate immunity response of root border-like cells.
- Taxon
- Arabidopsis and FlaxArabidopsisLinum usitatissimumt0
- Gene
- extensine0
- Outcome
- innate immunity responsee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Root Border-Like Cells of Arabidopsis and Flax”
e0“We also show that cell wall extensin is involved in the innate immunity response of root border-like cells”
The same questions in other papers
inoculation · molecular: metabolites · Linum usitatissimum (flax)Positive and negative results
1 in the opposite direction
- negative
inoculation · molecular: metabolites · ArabidopsisResults agree
6 papers in the same direction as this paper
- positive
- positive
- positive
3 papers more in this group
See all 7 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.