Abstract
The post-translational conjugation of small ubiquitin-related modifiers (SUMOs) to other proteins is involved in regulation of many processes in eukaryotic development; although its role in plant development is beginning to be dissected. Previously, we demonstrated that the siz1 mutant, which is impaired in SUMO E3 ligase, showed a dwarf-like shoot phenotype with accumulation of salicylic acid (SA), and the expression of nahG, a bacterial salicylate hydroxylase that catabolizes SA, in siz1 reduced the SA level and suppressed dwarfism. Herein, we provide evidence that the SIZ1 gene controls cell division and elongation through regulation of the SA level. Mature siz1-2 and siz1-3 plants exhibited a dwarf-like shoot phenotype that is attributable to decreased leaf cell volume and number relative to the wild type. Cell division and expansion defects caused by siz1 were also suppressed by the expression of nahG. Expression of XTH8 and XTH31, encoding xyloglucan endotransglycosylase/hydrolase, which are thought to facilitate leaf cell expansion, was down-regulated in siz1 leaves. However, reduced XTH8 and XTH31 expression in siz1 plants was restored in nahG siz1-2 plants. These results indicate that SIZ1 regulates cell growth and plant development with regulation of SA accumulation. Also, XTH8 and XTH31 genes may be responsible for reduced leaf cell expansion.
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Claims 5
Claim · model-written summary
Mature siz1-2 and siz1-3 plants had decreased leaf cell volume and number relative to wild type.
- Taxon
- Arabidopsis
Arabidopsist0 - Material
- siz1-2 and siz1-3e1
- Treatment
- siz1-2 and siz1-3e1
- Outcome
- leaf cell volume and numbere1
- Direction
- decreasede1
- Comparator
- wild typee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Arabidopsis”
e1“Mature siz1-2 and siz1-3 plants exhibited a dwarf-like shoot phenotype that is attributable to decreased leaf cell volume and number relative to the wild type”
Claim · model-written summary
Cell division and expansion defects caused by siz1 were suppressed by expression of nahG.
- Taxon
- ArabidopsisArabidopsist0
- Treatment
- expression of nahGe2
- Gene
- nahGe2
- Outcome
- Cell division and expansion defectse2
- Direction
- suppressede2
- Comparator
- siz1e2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Arabidopsis”
e2“Cell division and expansion defects caused by siz1 were also suppressed by the expression of nahG”
Claim · model-written summary
Expression of XTH8 and XTH31 was down-regulated in siz1 leaves.
- Taxon
- ArabidopsisArabidopsist0
- Treatment
- siz1e3
- Gene
- XTH8 and XTH31e3
- Outcome
- Expressione3
- Direction
- down-regulatede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Arabidopsis”
e3“Expression of XTH8 and XTH31, encoding xyloglucan endotransglycosylase/hydrolase, which are thought to facilitate leaf cell expansion, was down-regulated in siz1 leaves”
Claim · model-written summary
Reduced XTH8 and XTH31 expression in siz1 plants was restored in nahG siz1-2 plants.
- Taxon
- ArabidopsisArabidopsist0
- Treatment
- nahGe4
- Gene
- XTH8 and XTH31e4
- Outcome
- XTH8 and XTH31 expressione4
- Direction
- restorede4
- Comparator
- siz1 plantse4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Arabidopsis”
e4“reduced XTH8 and XTH31 expression in siz1 plants was restored in nahG siz1-2 plants”
Claim · model-written summary
SIZ1 regulates cell growth and plant development in Arabidopsis by regulating salicylic acid accumulation.
- Taxon
- ArabidopsisArabidopsist0
- Gene
- SIZ1e5
- Compound
- SAe5
- Outcome
- cell growth and plant developmente5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Arabidopsis”
e5“These results indicate that SIZ1 regulates cell growth and plant development with regulation of SA accumulation”
The same questions in other papers
transgenic · cytology · ArabidopsisPositive and negative results
7 papers in the same direction as this paper · 6 in the opposite direction
- negative
- negative
- no effect
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See all 14 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.