Abstract
Pectin is a major component of the plant cell wall and is involved in functions including growth of the plant cell, organ development, and defense against pathogens. Our lab has developed a suite of transgenic Arabidopsis thaliana plants expressing microbial‐derived cell wall‐degrading enzymes to study Cell Wall Integrity (CWI) responses. Plants expressing one such enzyme, A. nidulans Pectin Methylesterase (AnPME), exhibit dwarfism beginning with emergence of the first true leaves and affecting all specialized organs and structures throughout their lifetime. These plants also possess reduced sensitivity to salt stress; while roots of AnPME plants are much smaller than wild‐type roots under unstressed conditions, root growth was not inhibited by 100 mM NaCl treatment. Preliminary results have also shown that AnPME plants are less susceptible to infection by the cyst‐forming nematode H. schaachtii . Ongoing research aims to quantify the degree of cell wall de‐methylesterification to correlate with degree of dwarfism, and further confirm resistance of roots to nematode penetration. These results illustrate the importance of pectin methylesterification status in plant fitness and development, as well as response to both biotic and abiotic stresses, most likely through CWI response. Support or Funding Information Linder Family Undergraduate Research Fellowship, Rob Stupka Memorial Scholarship
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Claims 5
Claim · model-written summary
AnPME-expressing plants showed dwarfism from first true leaves throughout their lifetime.
- Taxon
- Arabidopsis thaliana
Arabidopsis thalianae1 - Organ / stage
- first true leavese0
- Gene
- A. nidulans Pectin Methylesterase (AnPME)e0
- Outcome
- dwarfisme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plants expressing one such enzyme, A. nidulans Pectin Methylesterase (AnPME), exhibit dwarfism beginning with emergence of the first true leaves and affecting all specialized organs and structures throughout their lifetime.”
e1“Arabidopsis thaliana plants”
Claim · model-written summary
AnPME plants had reduced sensitivity to salt stress.
- Taxon
- Arabidopsis thalianaArabidopsis thalianae1
- Treatment
- salt stresse0
- Outcome
- sensitivity to salt stresse0
- Direction
- reducede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“These plants also possess reduced sensitivity to salt stress”
e1“Arabidopsis thaliana plants”
Claim · model-written summary
AnPME roots were much smaller than wild-type roots without stress.
- Taxon
- Arabidopsis thalianaArabidopsis thalianae1
- Outcome
- rootse0
- Direction
- much smallere0
- Qualifier
- under unstressed conditionse0
- Comparator
- wild‐type rootse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“roots of AnPME plants are much smaller than wild‐type roots under unstressed conditions”
e1“Arabidopsis thaliana plants”
Claim · model-written summary
Root growth of AnPME plants was not inhibited by 100 mM NaCl.
- Taxon
- Arabidopsis thalianaArabidopsis thalianae1
- Material
- AnPME plantse2
- Treatment
- 100 mM NaCl treatmente0
- Outcome
- root growthe0
- Direction
- not inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“root growth was not inhibited by 100 mM NaCl treatment”
e1“Arabidopsis thaliana plants”
e2“roots of AnPME plants”
Claim · model-written summary
Preliminary results indicate AnPME plants were less susceptible to H. schaachtii infection.
- Taxon
- Arabidopsis thalianaArabidopsis thalianae1
- Material
- AnPME plantse0
- Interactor
- H. schaachtiie0pest
- Outcome
- susceptible to infectione0
- Direction
- lesse0
- Qualifier
- Preliminary resultse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Preliminary results have also shown that AnPME plants are less susceptible to infection by the cyst‐forming nematode H. schaachtii”
e1“Arabidopsis thaliana plants”
The same questions in other papers
sodium chloride · growth · Arabidopsis thaliana (thale cress)Results differ
1 paper in the same direction as this paper · 14 in the opposite direction
- negative
- negative
- no effect
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See all 16 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.