Abstract
As multifunctional regulators of physiological processes, phytohormones play an important role in the regulation of expression of the plastid genome and chloroplast biogenesis. Hormones can directly regulate the expression of genes localized in the chloroplast genome. However, many components of the plastid transcription apparatus are encoded by nuclear rather than plastid genes. It remains obscure whether these nuclear genes are subject to hormonal regulation. This is the first study to show that phytohormones exert differential effects on the expression of nuclear genes of the transcription machinery of the Arabidopsis thaliana plastome. RT-PCR analysis showed that the level of transcripts of the majority of studied genes was activated by trans-zeatin but decreased under the influence of ABA, methyl jasmonate, and salicylic acid, whereas ethylene had no significant effect, and the effects of brassinolide depended on the illumination conditions. The results of this study indicate that the hormonal regulation of the plastome expression can be mediated by differential regulation of the nuclear genes encoding plastid transcription machinery components.
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Claims 5
Claim · model-written summary
Trans-zeatin activated transcript levels of most studied nuclear genes of the plastid transcription machinery.
- Taxon
- Arabidopsis thaliana
Arabidopsis thalianae1 - Treatment
- trans-zeatine2
- Outcome
- level of transcriptse2
- Direction
- activatede2
- Qualifier
- majority of studied genese2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“phytohormones exert differential effects on the expression of nuclear genes of the transcription machinery of the Arabidopsis thaliana plastome”
e2“the level of transcripts of the majority of studied genes was activated by trans-zeatin”
Claim · model-written summary
ABA, methyl jasmonate and salicylic acid decreased transcript levels of most studied nuclear genes of the plastid transcription machinery.
- Taxon
- Arabidopsis thalianaArabidopsis thalianae1
- Treatment
- ABA, methyl jasmonate, and salicylic acide3
- Outcome
- level of transcriptse2
- Direction
- decreasede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“phytohormones exert differential effects on the expression of nuclear genes of the transcription machinery of the Arabidopsis thaliana plastome”
e2“the level of transcripts of the majority of studied genes was activated by trans-zeatin”
e3“but decreased under the influence of ABA, methyl jasmonate, and salicylic acid”
Claim · model-written summary
Ethylene had no significant effect on transcript levels of these nuclear genes.
- Taxon
- Arabidopsis thalianaArabidopsis thalianae1
- Treatment
- ethylenee4
- Outcome
- level of transcriptse2
- Direction
- no significant effecte4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“phytohormones exert differential effects on the expression of nuclear genes of the transcription machinery of the Arabidopsis thaliana plastome”
e2“the level of transcripts of the majority of studied genes was activated by trans-zeatin”
e4“whereas ethylene had no significant effect”
Claim · model-written summary
The effects of brassinolide on these nuclear genes depended on the illumination conditions.
- Taxon
- Arabidopsis thalianaArabidopsis thalianae1
- Treatment
- brassinolidee5
- Outcome
- effectse5
- Qualifier
- depended on the illumination conditionse5
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“phytohormones exert differential effects on the expression of nuclear genes of the transcription machinery of the Arabidopsis thaliana plastome”
e5“the effects of brassinolide depended on the illumination conditions”
Claim · model-written summary
Hormonal regulation of plastome expression may be mediated by differential regulation of nuclear genes encoding plastid transcription machinery components.
- Taxon
- Arabidopsis thalianaArabidopsis thalianae1
- Outcome
- hormonal regulation of the plastome expressione6
- Qualifier
- mediated by differential regulation of the nuclear genes encoding plastid transcription machinery componentse6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“phytohormones exert differential effects on the expression of nuclear genes of the transcription machinery of the Arabidopsis thaliana plastome”
e6“The results of this study indicate that the hormonal regulation of the plastome expression can be mediated by differential regulation of the nuclear genes encoding plastid transcription machinery components”
The same questions in other papers
ethene · molecular: expression · Arabidopsis thaliana (thale cress)Positive and negative results
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- positive
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See all 18 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.