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ABSTRACT: MYB transcription factors drive evolutionary innovations in Arabidopsis fruit trichome patterning

PROVIDER: PRJNA646494 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR12229320_1.fastq.gz	Fastqsanger.gz
	SRR12229320_2.fastq.gz	Fastqsanger.gz
	SRR12229321_1.fastq.gz	Fastqsanger.gz
	SRR12229321_2.fastq.gz	Fastqsanger.gz
	SRR12229322_1.fastq.gz	Fastqsanger.gz

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The differentially expressed genes identified in the microarray analysis using myb5 and wild-type (Col) seeds

Project description:The MYB gene family encodes transcription factors with a diverse range of functions in Arabidopsis. This study demonstrated that MYB5, which is expressed in trichomes and seeds, plays a central role in trichome and seed development. A microarray analysis of myb5 seeds identified other members of the MYB5 regulatory network.

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Transcriptome profiling reveals roles of meristem regulators and polarity genes during multicellular fruit trichome development in cucumber (Cucumis sativus L.).

Project description:Trichomes are the hair-like structures that are widely present on the surface of aerial organs and function in plant defense against biotic and abiotic stresses. Previous studies focus on the single cell trichomes in Arabidopsis and cotton, or multicellular glandular trichomes in tomato, but the developmental process and molecular mechanisms controlling multicellular non-glandular trichome development are largely neglected. Here, we extensively characterized the fruit trichome (spine) development in wild type cucumber and in a tiny branched hair (tbh) mutant that contains a spontaneous mutation and has hairless foliage and smooth fruit surface. Our data indicated that cucumber trichome was multicellular and non-glandular, with no branches or endoreduplication. Further, the major feature of cucumber trichome development was spine base expansion. Transcriptome profiling through Digital Gene Expression indicated that meristem-related genes and transcription factors were implicated in the fruit spine development, and polarity regulators were upregulated during spine base expansion. qRT-PCR verified the reliability of our RNA-SEQ data, and in situ hybridization confirmed the enriched expression of meristem regulators CUP-SHAPED COTYLEDON3 (CUC3) and STM (SHOOT MERISTEMLESS) , as well as the abaxial identity gene KANADI (KAN) in cucumber fruit spine. Together, our results suggest a distinct regulatory pathway involving meristem genes and polarity regulators in multicellular trichome development in cucumber.

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Comparison of gene expression between wild type and gl3 egl3 trichomeless mutant green seedling tissues

Project description:The development of trichomes (leaf hairs) from pluripotent epidermal cells in Arabidopsis provides a powerful system to investigate the regulatory motifs involved in plant cell differentiation. Genetic studies have revealed that a bHLH transcription factor, GL3, activates downstream genes required for trichome initiation by interacting with a R2R3-MYB protein, GL1. We have taken advantage of several mutants in the trichome developmental pathway and gene expression analyses to identify a set of genes expressed predominantly in Arabidopsis trichomes.

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Transcriptome profiling reveals roles of meristem regulators and polarity genes during multicellular fruit trichome development in cucumber (Cucumis sativus L.).

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Comparative Transcriptomics Identifies Differentially Expressed Genes Regulating endoreplication and trichome branching

Project description:Purpose:Comparative transcriptome analyses was applied to characterize gene expression after overexpression GaTOP6B in Arabidopsis thaliana. Methods:The fresh leaves were collected from 4-week-old WT plants and transgenic Arabidopsis lines under drought treatments. The total RNA was first extracted using TRIzol Reagent (TaKaRa, Tokyo, Japan), and treated with RNase-free DNase I (TaKaRa), and then followed with mRNA purification using the Magnetic Oligo (dT) Beads (Illumina, San Diego, CA, USA) according to the manufacturer’s protocol. Results: In this study,our RNA-Seq analysis suggested overexpression of GaTOP6B could suppress the downstream signal transduction of jasmonic acid, cytokinin and brassinolide. Furthermore, the transcriptome analysis also confirmed the downregulation of B-type cyclins genes related to cell cycle, and TCP, MYB transcription factors, which subsequently regulate downstream signal cascades to modulate trichome development. Conclusions: Our results provide evidence on the crucial roles of GaTOP6B for improving trichome branch number by enhancing cell ploidy levels and suppressing the expression of related transcription factors.

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Project description:The development of trichomes (leaf hairs) from pluripotent epidermal cells in Arabidopsis provides a powerful system to investigate the regulatory motifs involved in plant cell differentiation. Genetic studies have revealed that a bHLH transcription factor, GL3, activates downstream genes required for trichome initiation by interacting with a R2R3-MYB protein, GL1. In order to investigate genome-wide regulatory functions of GL1 and GL3, we performed genome-wide expression analyses using GR inducible systems of GL1 and GL3.

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