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Systemic induction of phospholipid-based signaling in leaves of arbuscular mycorrhizal rice plants

ABSTRACT: Systemic induction of phospholipid-based signaling in leaves of arbuscular mycorrhizal rice plants

PROVIDER: PRJNA625053 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR11540639_1.fastq.gz	Fastqsanger.gz
	SRR11540639_2.fastq.gz	Fastqsanger.gz
	SRR11540640_1.fastq.gz	Fastqsanger.gz
	SRR11540640_2.fastq.gz	Fastqsanger.gz
	SRR11540641_1.fastq.gz	Fastqsanger.gz

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Systemic induction of phospholipid-based signaling in leaves of arbuscular mycorrhizal rice plants

Project description:Most land plants form beneficial associations with arbuscular mycorrhizal (AM) fungi which improves mineral nutrition, mainly phosphorus and nitrogen in the host plant in exchange for photosynthetically fixed carbon. Most of our knowledge on the AM symbiosis derives from dicotyledonous species. We show that inoculation with the AM fungus Funneliformis mossease stimulates growth and increases Pi content in leaves of the rice cultivar Loto (O. sativa ssp japonica). Although rice is a host for AM fungi, the molecular mechanism underlying the AM symbiosis, in particular the systemic transcriptional responses of shoots to AM inoculation, remain largely elusive. Transcript profiling of the shoots indicated the systemic induction of genes involved in the biosynthesis of phospholipids (phosphoinositides, inositol polyphosphates) and down-regulation of non-phosphorus lipids (galactolipids, sulfolipids) in leaves of mycorrhizal rice. Regulation of phospholipid biosynthesis genes appears to be coordinated with a reduced expression of genes involved in jasmonic acid and ethylene biosynthesis and signaling. Genes involved in phosphate starvation responses and remobilization of Pi were also found to be down-regulated in leaves of mycorrhizal rice. These results demonstrated that the AM symbiosis is accompanied by complex alterations in gene expression in shoots which are potentially important to maintain a stable symbiotic relationship in rice plants.

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Gene expression data from arbuscular mycorrhizal and phosphate-treated Medicago truncatula roots.

Project description:Arbuscular mycorrhiza (AM) interactions between plants and Glomeromycota fungi primarily support phosphate aquisition of most terrestrial plant species. To unravel gene expression in Medicago truncatula root colonization by AM fungi, we used genome-wide transcriptome profiling based on whole mycorrhizal roots. We used GeneChips to detail the global programme of gene expression in response to colonization by arbuscular mycorrhizal fungi and in response to a treatment with phosphate and identified genes differentially expressed during this process. Medicago truncatula roots were harvested at 28 days post inoculation with the two different arbuscular mycorrhizal fungi Glomus intraradices (Gi-Myc) and Glomus mosseae (Gm-Myc) under low phosphate conditions (20 µM phosphate) or after a 28 days treatment with 2 mM phosphate in the absence of arbuscular mycorrhizal fungi (2mM-P). As a control, uninfected roots grown under low phosphate conditions (20 µM phosphate) were used (20miM-P). Three biological replicates consisting of pools of five roots were used for RNA extraction and hybridization on Affymetrix GeneChips.

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Effects of arbuscular mycorrhizal symibiosis on gene expression in the foxtail millet roots

Project description:To investigate the involvement of arbuscular mycorrhizal symbiosis in the moleular regulation in foxtail millet roots and the effects of genetic variation on AMS-mediated molecular regulation, we isolated total RNA from the roots of 3 different landraces for comprehensive transcriptomic analysis. We then performed gene expression profiling analysis using data obtained from RNA-seq of 3 different landraces (Hanevalval, TT8, ICE36) after 6-week mock or arbuscular mycorrhizal fungi treatments.

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Gene expression data from arbuscular mycorrhizal and phosphate-treated Medicago truncatula roots.

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Gene expression during early stages of arbuscular mycorrhizal root formation in Medicago truncatula.

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Arbuscular mycorrhizal fungi

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Analysis of gene expression in leaves of Medicago truncatula plants inoculated with arbuscular mycorrhizal fungi and plants fertilized with phosphate

Project description:Arbuscular mycorrhizas (AM) are the most common symbiotic associations between plant’s root compartment and fungi. They can provide both nutritional benefit (mostly inorganic phosphate) leading to improved growth and non-nutritional benefits including defense responses to environmental cues throughout the host plant, which in return delivers carbohydrates to the symbiont. However how transcriptional changes occurring in AM leaves differ from those induced by phosphate fertilization is poorly understood. We investigated systemic changes in the leaves of mycorrhized Medicago truncatula compared to non-mycorrhized control plants, and in phosphate fertilized plants compared to control plants.

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