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Transcriptional profiling of Arabidopsis seedlings responses to phytosulfokine (PSK)

ABSTRACT: Transcriptional profiling of Arabidopsis seedlings responses to phytosulfokine (PSK)

PROVIDER: PRJNA1072978 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR27854584_1.fastq.gz	Fastqsanger.gz
	SRR27854584_2.fastq.gz	Fastqsanger.gz
	SRR27854585_1.fastq.gz	Fastqsanger.gz
	SRR27854585_2.fastq.gz	Fastqsanger.gz
	SRR27854586_1.fastq.gz	Fastqsanger.gz

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Transcriptional profiling of Arabidopsis seedlings responses to phytosulfokine (PSK)

Project description:Phytosulfokine (PSK) is a plant peptide hormone that contributes to plant signaling and induced various of effects, including growth, senescence, stress tolerant and defense responses. PSK is a pentapeptide with two tyrosine sulfated by tyrosylprotein sulfotransferase (TPST) enzyme. The sulfated PSK can bind to its cell surface receptors, but the transcriptional readouts remain largely unknown. Here, we treated tpst mutant that are unable to produce native sulfated PSK with synthetic active PSK to capture concentration-sensitive readouts of PSK signaling.

2024-10-17 | GSE254987 | GEO

Transcriptional profiling of Arabidopsis responses to phytosulfokine (PSK)

Project description:Transcriptional profiling of Arabidopsis responses to phytosulfokine (PSK)

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Transcriptional profiling of Arabidopsis shoots and roots responses to phytosulfokine (PSK)

2024-10-17 | GSE254986 | GEO

Transcriptional profiling of Arabidopsis shoots and roots responses to phytosulfokine (PSK)

Project description:Transcriptional profiling of Arabidopsis shoots and roots responses to phytosulfokine (PSK)

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Transcriptional profiling of Arabidopsis responses to phytosulfokine (PSK)

Project description:Our study reveals that phytosulfokine (PSK) promotes plant growth by suppressing defense mechanisms, highlighting a key link between growth regulation and immune response. By demonstrating how PSK downregulates WRKY TFs and associated kinase activity, this research provides valuable insights into plant biology, offering potential strategies for improving crop yield and pathogen resistance. This SuperSeries is composed of the SubSeries listed below.

2024-10-17 | GSE254988 | GEO

Phytosulfokine peptide regulates the growth-immunity trade-off through CAMTA3-mediated transcriptional signaling in Arabidopsis

Project description:Phytosulfokine (PSK) peptide hormone promotes plant growth while suppressing endogenous immunity. However, the underlying mechanism remains poorly understood. Here we show that PSK regulates the trade-off between growth and immunity by mediating stabilization and cytosol-nucleus translocation of Calmodulin-binding Transcription Activator 3 (CAMTA3). By genetic screening of an Arabidopsis thaliana mutant library, we identified a mutant named growth retardation and autoimmunity 1 (gra1). Map-based cloning and bulk population sequencing disclosed that GRA1 encodes TYROSYLPROTEIN SULFOTRANSFERASE (TPST) for the biosynthesis of sulfated peptides. Treatment with PSK can restore the reduced callus proliferation of gra1 mutants and overexpression of PSK can promote plant growth but reduce immune responses. RNA-seq and genetic studies show that PSK regulates plant growth and immunity through salicylic acid pathway. Further, we revealed that PSK stabilizes CAMTA3 and enables its translocation from cytosol to nucleus by facilitating its binding to calmodulin 6 (CaM6) and CaM7, and CAMTA3 inhibits the expression of SYSTEMIC ACQUIRED RESISTANCE DEFICIENT 1 (SARD1) and CALMODULIN-BINDING PROTEIN 60g (CBP60g) to inhibit salicylic acid biosynthesis and plant immunity. Collectively, we disclose a signaling pathway PSK-PSKR-CaM6/7-CAMTA3-SARD1/CBP60G that regulates the trade-off between plant growth and immunity.

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Next Generation Sequencing Facilitates Quantitative Analysis of PSKγ1ox and control Transcriptomes

Project description:Phytosulfokine-α (PSK-α), a sulfated pentapeptide hormone with the sequence YIYTQ, plays important roles in many aspects of plant growth and development. In this study, we identified a pair of putative precursor genes in soybean, GmPSKγ1 and -2, encoding a PSK-like peptide: PSK-γ. Similar to PSK-α in amino acid composition, the sequence of PSK-γ is YVYTQ, and the tyrosines undergo sulfonylation. Treatment of Arabidopsis seedlings with synthetic sulfated PSK-γ significantly enhanced root elongation, indicating that PSK-γ might be a functional analog of PSK-α. Expression pattern analysis revealed that the two GmPSKγ genes, especially GmPSKγ1, are primarily expressed in developing soybean seeds. Heterologous expression of GmPSKγ1 under the control of a seed-specific promoter markedly increased seed size and weight in Arabidopsis, and this promoting effect of PSK-γ on seed growth was further confirmed in transgenic tobacco constitutively expressing GmPSKγ1. Cytological analysis of transgenic Arabidopsis seeds revealed that PSK-γ promotes seed growth by inducing embryo cell expansion. In addition, transcriptome analysis of GmPSKγ1-expressing Arabidopsis seeds suggested that PSK-γ signaling may regulate cell wall loosening to promote cell expansion. Overall, our results shed light on the mechanism by which PSK-γ promotes seed growth, paving the way for the use of this new peptide for biotechnological improvement of crop seed/grain size and yield.

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