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Transcriptional response of A. thaliana Root and Shoot tissue to light stress and presence of microbial communities

ABSTRACT: Transcriptional response of A. thaliana Root and Shoot tissue to light stress and presence of microbial communities

PROVIDER: PRJNA671859 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR12898856.fastq.gz	Fastqsanger.gz
	SRR12898857.fastq.gz	Fastqsanger.gz
	SRR12898858.fastq.gz	Fastqsanger.gz
	SRR12898859.fastq.gz	Fastqsanger.gz
	SRR12898860.fastq.gz	Fastqsanger.gz

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Transcriptional response of A. thaliana Root and Shoot tissue to light stress and presence of microbial communities

Project description:We profiled the root and shoot transcriptomes of BFO-colonized (Bacteria, Fungi, Oomycetes) and germ free A. thaliana exposed to Low PAR (photoactive radiation, LP) and normal condition (NC) in the gnotobiotic FlowPot system five weeks post inoculation.

2020-10-27 | GSE160106 | GEO

Transcriptional response of A. thaliana Root and Shoot tissue to light stress and presence of microbial communities in myc2-3 and MYC2-Flag lines

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Transcriptional response of A. thaliana Root and Shoot tissue to light stress and presence of microbial communities in myc2-3 and MYC2-Flag lines

Project description:Transcriptional response of A. thaliana Root and Shoot tissue to light stress and presence of microbial communities in myc2-3 and MYC2-Flag lines

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ELONGATED HYPOCOTYL5-mediated light signaling promotes shoot regeneration in Arabidopsis thaliana

Project description:Injured plant somatic tissues regenerate themselves by establishing the shoot or root meristems. In Arabidopsis (Arabidopsis thaliana) a two-step culture system ensures regeneration by first promoting the acquisition of pluripotency and subsequently specifying the fate of new meristems. Although previous studies have reported the importance of phytohormones auxin and cytokinin in determining the fate of new meristems, it remains elusive whether and how the environmental factors influence this process. In this study, we investigated the impact of light signals on shoot regeneration using Arabidopsis hypocotyl as explants. We found that light signals promote shoot regeneration while inhibiting root formation. ELONGATED HYPOCOTYL 5 (HY5), the pivotal transcriptional factor in light signaling, plays a central role in this process by mediating the expression of key genes controlling the fate of new meristems. Specifically, HY5 directly represses root development genes and activates shoot meristem genes, leading to the establishment of shoot progenitor from pluripotent callus. We further demonstrated that the early activation of photosynthesis is critical for shoot initiation, and this is transcriptionally regulated downstream of the HY5-dependent pathways. In conclusion, we uncovered the intricate molecular mechanisms by which light signals control the establishment of new meristem through the regulatory network governed by HY5, thus, highlighting the influence of light signals on plant developmental plasticity.

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Identification of root transcriptional responses to shoot illumination in Arabidopsis thaliana

Project description:This experiment aimed to investigate which genes are involved in the early photomorphogenic root development of dark grown roots when only the shoot was exposed to light.

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Root development and responses are alerted by light

Project description:Investigation of whole genome gene expression level changes in Arabidopsis roots by the effect of light. Plant growth is sustained by a continuous cell division in meristems followed by cell differentiation and elongation. We have found that in Arabidopsis thaliana roots, flavonols play a key role in regulating the transition from cell division to differentiation. Using an engineered device to grow roots in darkness, but shoot in light cycle, coupled with transcriptomic and metabolomics analysis, we deciphered that flavonols accumulation regulates proliferation-promoting levels of auxin-PLETHORA and superoxide anion (O2-). High flavonols levels restrict auxin transport and the PLETHORA gradient but also superoxide radical content, promoting an accelerated cell differentiation. Furthermore, cytokinin-SHY2 and H2O2-UPB1 pathways, which promote differentiation and, respectively, antagonize auxin and O2- activity, increase flavonols biosynthesis establishing mutual interactions among these pathways. Flavonols function as positional signals integrating hormonal and ROS pathways to determine final organ growth. This work analyze the effect of root illumination in gene transcription. Details of how plants and roots are grown are described in Silva et al. (submitted) A six chip study using total RNA extracted from three independent experiments of Arabidopsis roots growing in presence of light and three independent experiments of Arabidopsis roots growing without light.

2016-04-01 | E-GEOD-68093 | biostudies-arrayexpress

Transdifferentiation from root to shoot apical meristem

Project description:au10-15_cineroots - transdifferentiation - Study of the molecular mechanism during transdifferenciation from root apical meristem to shoot apical meristem - culture in middle with different hormons, permits transdifferenciation from root to shoot tissues.

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Project description:Microbiota-root-shoot axis modulation by MYC2 alleviates light 1limitation stress in Arabidopsis, Bacterial Data

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Light limitation stress Arabidopsis

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