Paper · 2015 · Plant Signaling & Behavior

Rice ubiquitin ligase EL5 prevents root meristematic cell death under high nitrogen conditions and interacts with a cytosolic GAPDH

Yoko Nishizawa; Susumu Mochizuki; Hanae Koiwai; et al.

7
claims
13
verbatim quotes
13
citations
3
research areas
✓
Open access

Abstract

Root formation in rice transformants overexpressing mutated EL5 (mEL5) was severely inhibited because of meristematic cell death. Cell death was caused by nitrogen sources, particularly nitrate forms, in the culture medium. Nitrite treatment increased the cytokinin contents in roots, but mEL5 contained more cytokinins than non-transformants. Transcriptome profiling showed overlaps between nitrite-responsive genes in non-transformants and genes with altered expression in untreated mEL5. These results indicate that impairment of EL5 function activates nitrogen signaling despite the absence of a nitrogen source. Physical interaction between the EL5 C-terminal region and a cytosolic glyceraldehyde-3-phosphate dehydrogenase, OsGapC2, was demonstrated in vitro and in vivo. Elucidation of the role of glyceraldehyde-3-phosphate dehydrogenase in oxidative cell death in plants is expected in future.

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Claims 7

Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Root formation in rice transformants overexpressing mEL5 was severely inhibited.

Material
transformantse1
Treatment
overexpressing mutated EL5 (mEL5)e1
Gene
EL5e1
Outcome
Root formatione1
Direction
severely inhibitede1

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Oryza sativa
Oryza sativa · Taxon · picture from its Wikimedia Commons categoryDesmanthus4food · CC BY-SA 3.0 us · Wikimedia Commons ↗

Verbatim

e1

“Root formation in rice transformants overexpressing mutated EL5 (mEL5) was severely inhibited because of meristematic cell death”

✓ located verbatim in the source · abstract, characters 0–128 · show in text ↑
Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Nitrogen sources, particularly nitrate forms, caused cell death in the culture medium in rice.

Organ / stage
meristematice1
Treatment
nitrogen sources, particularly nitrate formse2
Outcome
Cell deathe2
Setting
culture mediume2

Not reportedComparatorDirection

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Oryza sativa
Oryza sativa · Taxon · picture from its Wikimedia Commons categoryDesmanthus4food · CC BY-SA 3.0 us · Wikimedia Commons ↗

Verbatim

e1

“Root formation in rice transformants overexpressing mutated EL5 (mEL5) was severely inhibited because of meristematic cell death”

✓ located verbatim in the source · abstract, characters 0–128 · show in text ↑
e2

“Cell death was caused by nitrogen sources, particularly nitrate forms, in the culture medium”

✓ located verbatim in the source · abstract, characters 130–222 · show in text ↑
Intervention effectobservedoriginal resultmeasured

Claim · model-written summary

Nitrite treatment increased cytokinin contents in rice roots.

Organ / stage
rootse3
Treatment
Nitrite treatmente3
Compound
cytokinine3
Outcome
cytokinin contentse3
Direction
increasede3

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Oryza sativa
Oryza sativa · Taxon · picture from its Wikimedia Commons categoryDesmanthus4food · CC BY-SA 3.0 us · Wikimedia Commons ↗

Verbatim

e1

“Root formation in rice transformants overexpressing mutated EL5 (mEL5) was severely inhibited because of meristematic cell death”

✓ located verbatim in the source · abstract, characters 0–128 · show in text ↑
e3

“Nitrite treatment increased the cytokinin contents in roots”

✓ located verbatim in the source · abstract, characters 224–283 · show in text ↑
Associationobservedoriginal resultmeasured

Claim · model-written summary

mEL5 rice contained more cytokinins than non-transformants.

Material
mEL5e4
Compound
cytokininse4
Outcome
cytokininse4
Direction
moree4
Comparator
non-transformantse4

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Oryza sativa
Oryza sativa · Taxon · picture from its Wikimedia Commons categoryDesmanthus4food · CC BY-SA 3.0 us · Wikimedia Commons ↗

Verbatim

e1

“Root formation in rice transformants overexpressing mutated EL5 (mEL5) was severely inhibited because of meristematic cell death”

✓ located verbatim in the source · abstract, characters 0–128 · show in text ↑
e4

“mEL5 contained more cytokinins than non-transformants”

✓ located verbatim in the source · abstract, characters 289–342 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

Nitrite-responsive genes in non-transformants overlapped with genes with altered expression in untreated mEL5 rice.

Material
non-transformantse5
Gene
nitrite-responsive genese5
Outcome
overlaps between nitrite-responsive genese5
Comparator
untreated mEL5e5

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Oryza sativa
Oryza sativa · Taxon · picture from its Wikimedia Commons categoryDesmanthus4food · CC BY-SA 3.0 us · Wikimedia Commons ↗

Verbatim

e1

“Root formation in rice transformants overexpressing mutated EL5 (mEL5) was severely inhibited because of meristematic cell death”

✓ located verbatim in the source · abstract, characters 0–128 · show in text ↑
e5

“Transcriptome profiling showed overlaps between nitrite-responsive genes in non-transformants and genes with altered expression in untreated mEL5”

✓ located verbatim in the source · abstract, characters 344–489 · show in text ↑
Mechanismauthor interpretationoriginal resultmeasured

Claim · model-written summary

Impairment of EL5 function is interpreted to activate nitrogen signalling in rice even without a nitrogen source.

Gene
EL5e6
Outcome
nitrogen signalinge6
Qualifier
despite the absence of a nitrogen sourcee6

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Oryza sativa
Oryza sativa · Taxon · picture from its Wikimedia Commons categoryDesmanthus4food · CC BY-SA 3.0 us · Wikimedia Commons ↗

Verbatim

e1

“Root formation in rice transformants overexpressing mutated EL5 (mEL5) was severely inhibited because of meristematic cell death”

✓ located verbatim in the source · abstract, characters 0–128 · show in text ↑
e6

“These results indicate that impairment of EL5 function activates nitrogen signaling despite the absence of a nitrogen source”

✓ located verbatim in the source · abstract, characters 491–615 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

The EL5 C-terminal region physically interacts with OsGapC2 in vitro and in vivo.

Gene
OsGapC2e7
Outcome
Physical interactione7
Qualifier
in vitro and in vivoe7

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Oryza sativa
Oryza sativa · Taxon · picture from its Wikimedia Commons categoryDesmanthus4food · CC BY-SA 3.0 us · Wikimedia Commons ↗

Verbatim

e1

“Root formation in rice transformants overexpressing mutated EL5 (mEL5) was severely inhibited because of meristematic cell death”

✓ located verbatim in the source · abstract, characters 0–128 · show in text ↑
e7

“Physical interaction between the EL5 C-terminal region and a cytosolic glyceraldehyde-3-phosphate dehydrogenase, OsGapC2, was demonstrated in vitro and in vivo”

✓ located verbatim in the source · abstract, characters 617–776 · show in text ↑

nitrogen · cytology · Oryza sativa (rice)Positive and negative results

3 papers: 1 positive, 2 negative or no effect

1 paper in the same direction as this paper · 1 in the opposite direction

  1. negative
  2. positive
See all 3 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.