Paper · 2020 · International Journal of Molecular Sciences

Impaired Expression of Chloroplast HSP90C Chaperone Activates Plant Defense Responses with a Possible Link to a Disease-Symptom-Like Phenotype

Shaikhul Islam; Sachin Ashok Bhor; Keisuke Tanaka; et al.

8
claims
18
verbatim quotes
12
citations
3
research areas
✓
Open access · cc-by

Abstract

RNA-seq analysis of a transgenic tobacco plant, i-hpHSP90C, in which chloroplast HSP90C genes can be silenced in an artificially inducible manner resulting in the development of chlorosis, revealed the up- and downregulation of 2746 and 3490 genes, respectively. Gene ontology analysis of these differentially expressed genes indicated the upregulation of ROS-responsive genes; the activation of the innate immunity and cell death pathways; and the downregulation of genes involved in photosynthesis, plastid organization, and cell cycle. Cell death was confirmed by trypan blue staining and electrolyte leakage assay, and the H2O2 production was confirmed by diaminobenzidine staining. The results collectively suggest that the reduced levels of HSP90C chaperone lead the plant to develop chlorosis primarily through the global downregulation of chloroplast- and photosynthesis-related genes and additionally through the light-dependent production of ROS, followed by the activation of immune responses, including cell death.

Abstract from the paper’s OpenAlex record; open copy licensed cc-by. 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 8

Intervention effectobservedoriginal resultmeasured

Claim · model-written summary

Silencing chloroplast HSP90C in tobacco upregulated 2746 genes.

Treatment
silenced in an artificially inducible mannere0
Outcome
differentially expressed genese2
Direction
increaseinferrede1
Value
2746e1

Not reportedComparator

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

Nicotiana tabacum
Nicotiana tabacum · TaxonJom / Joachim Müllerchen · CC BY 2.5 · Wikimedia Commons ↗

Verbatim

e0

“RNA-seq analysis of a transgenic tobacco plant, i-hpHSP90C, in which chloroplast HSP90C genes can be silenced in an artificially inducible manner”

✓ located verbatim in the source · abstract, characters 0–145 · show in text ↑
e1

“revealed the up- and downregulation of 2746 and 3490 genes, respectively”

✓ located verbatim in the source · abstract, characters 189–261 · show in text ↑
e2

“Gene ontology analysis of these differentially expressed genes indicated the upregulation of ROS-responsive genes”

✓ located verbatim in the source · abstract, characters 263–376 · show in text ↑
Intervention effectobservedoriginal resultmeasured

Claim · model-written summary

Silencing chloroplast HSP90C in tobacco downregulated 3490 genes.

Treatment
silenced in an artificially inducible mannere0
Outcome
differentially expressed genese2
Direction
decreaseinferrede1
Value
3490e1

Not reportedComparator

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

Nicotiana tabacum
Nicotiana tabacum · TaxonJom / Joachim Müllerchen · CC BY 2.5 · Wikimedia Commons ↗

Verbatim

e0

“RNA-seq analysis of a transgenic tobacco plant, i-hpHSP90C, in which chloroplast HSP90C genes can be silenced in an artificially inducible manner”

✓ located verbatim in the source · abstract, characters 0–145 · show in text ↑
e1

“revealed the up- and downregulation of 2746 and 3490 genes, respectively”

✓ located verbatim in the source · abstract, characters 189–261 · show in text ↑
e2

“Gene ontology analysis of these differentially expressed genes indicated the upregulation of ROS-responsive genes”

✓ located verbatim in the source · abstract, characters 263–376 · show in text ↑
Intervention effectobservedoriginal resultmeasured

Claim · model-written summary

Silencing chloroplast HSP90C upregulated ROS-responsive genes in tobacco.

Treatment
silenced in an artificially inducible mannere0
Outcome
ROS-responsive genese2
Direction
upregulatione2

Not reportedComparator

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

Nicotiana tabacum
Nicotiana tabacum · TaxonJom / Joachim Müllerchen · CC BY 2.5 · Wikimedia Commons ↗

Verbatim

e0

“RNA-seq analysis of a transgenic tobacco plant, i-hpHSP90C, in which chloroplast HSP90C genes can be silenced in an artificially inducible manner”

✓ located verbatim in the source · abstract, characters 0–145 · show in text ↑
e2

“Gene ontology analysis of these differentially expressed genes indicated the upregulation of ROS-responsive genes”

✓ located verbatim in the source · abstract, characters 263–376 · show in text ↑
Intervention effectobservedoriginal resultmeasured

Claim · model-written summary

Silencing chloroplast HSP90C activated innate immunity and cell death pathways in tobacco.

Treatment
silenced in an artificially inducible mannere0
Outcome
innate immunity and cell death pathwayse3
Direction
activatione3

Not reportedComparator

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

Nicotiana tabacum
Nicotiana tabacum · TaxonJom / Joachim Müllerchen · CC BY 2.5 · Wikimedia Commons ↗

Verbatim

e0

“RNA-seq analysis of a transgenic tobacco plant, i-hpHSP90C, in which chloroplast HSP90C genes can be silenced in an artificially inducible manner”

✓ located verbatim in the source · abstract, characters 0–145 · show in text ↑
e3

“the activation of the innate immunity and cell death pathways”

✓ located verbatim in the source · abstract, characters 378–439 · show in text ↑
Intervention effectobservedoriginal resultmeasured

Claim · model-written summary

Silencing chloroplast HSP90C downregulated genes involved in photosynthesis, plastid organization and cell cycle in tobacco.

Treatment
silenced in an artificially inducible mannere0
Outcome
genes involved in photosynthesis, plastid organization, and cell cyclee4
Direction
downregulatione4

Not reportedComparator

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

Nicotiana tabacum
Nicotiana tabacum · TaxonJom / Joachim Müllerchen · CC BY 2.5 · Wikimedia Commons ↗

Verbatim

e0

“RNA-seq analysis of a transgenic tobacco plant, i-hpHSP90C, in which chloroplast HSP90C genes can be silenced in an artificially inducible manner”

✓ located verbatim in the source · abstract, characters 0–145 · show in text ↑
e4

“the downregulation of genes involved in photosynthesis, plastid organization, and cell cycle”

✓ located verbatim in the source · abstract, characters 445–537 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

Cell death was confirmed in the silenced tobacco plants by trypan blue staining and electrolyte leakage.

Outcome
Cell deathe5
Qualifier
trypan blue staining and electrolyte leakage assaye5

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

Nicotiana tabacum
Nicotiana tabacum · TaxonJom / Joachim Müllerchen · CC BY 2.5 · Wikimedia Commons ↗

Verbatim

e0

“RNA-seq analysis of a transgenic tobacco plant, i-hpHSP90C, in which chloroplast HSP90C genes can be silenced in an artificially inducible manner”

✓ located verbatim in the source · abstract, characters 0–145 · show in text ↑
e5

“Cell death was confirmed by trypan blue staining and electrolyte leakage assay”

✓ located verbatim in the source · abstract, characters 539–617 · show in text ↑

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Observationobservedoriginal resultmeasured

Claim · model-written summary

H2O2 production was confirmed in the silenced tobacco plants by diaminobenzidine staining.

Outcome
H2O2 productione6
Qualifier
diaminobenzidine staininge6

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

Nicotiana tabacum
Nicotiana tabacum · TaxonJom / Joachim Müllerchen · CC BY 2.5 · Wikimedia Commons ↗

Verbatim

e0

“RNA-seq analysis of a transgenic tobacco plant, i-hpHSP90C, in which chloroplast HSP90C genes can be silenced in an artificially inducible manner”

✓ located verbatim in the source · abstract, characters 0–145 · show in text ↑
e6

“the H2O2 production was confirmed by diaminobenzidine staining”

✓ located verbatim in the source · abstract, characters 623–685 · show in text ↑
Mechanismauthor interpretationoriginal resultnegativemeasured

Claim · model-written summary

Reduced HSP90C chaperone levels lead tobacco to develop chlorosis mainly through down-regulation of chloroplast- and photosynthesis-related genes, and additionally through light-dependent ROS production and immune activation.

Gene
HSP90Ce7
Outcome
chlorosise7
Qualifier
the global downregulation of chloroplast- and photosynthesis-related genese7

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

Nicotiana tabacum
Nicotiana tabacum · TaxonJom / Joachim Müllerchen · CC BY 2.5 · Wikimedia Commons ↗

Verbatim

e0

“RNA-seq analysis of a transgenic tobacco plant, i-hpHSP90C, in which chloroplast HSP90C genes can be silenced in an artificially inducible manner”

✓ located verbatim in the source · abstract, characters 0–145 · show in text ↑
e7

“The results collectively suggest that the reduced levels of HSP90C chaperone lead the plant to develop chlorosis primarily through the global downregulation of chloroplast- and photosynthesis-related genes”

✓ located verbatim in the source · abstract, characters 687–892 · show in text ↑