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Citrus limon

ABSTRACT: Transcriptome analysis and identification of genes associated with lemon floral transition and flower development during floral inductive water deficits

PROVIDER: PRJNA355134 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR5058330_1.fastq.gz	Fastqsanger.gz
	SRR5058330_2.fastq.gz	Fastqsanger.gz
	SRR5058322_1.fastq.gz	Fastqsanger.gz
	SRR5058322_2.fastq.gz	Fastqsanger.gz
	SRR5058332_1.fastq.gz	Fastqsanger.gz

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Transcriptome analysis and identification of genes associated with lemon floral transition and flower development during floral inductive water deficits

Project description:Water deficit is the key induction factors known to induce flowering in many woody plants, whereas reports on the molecular mechanisms underlying floral induction by water deficit are scarce. Here, we analyzed morphology, cytology and different hormone level of lemon buds during floral inductive water deficits. Higher levels of ABA were observed and the floral buds initiated differentiation by paraffin sections analysis. Total 1,638 differentially expressed genes (DEGs) were identified by RNA-sequencing. Some DEGs were related to flowering, while others were associated with hormone biosynthesis or metabolism.

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Transcription profiling of Arabidopsis micro-dissected apical tissue harvested 0, 3, 5, and 7 days after the shift to LD from SD

Project description:Floral transition and flower development are regulated by numerous environmental and endogenous signals, which are integrated at a relatively small number of floral integrators, such as FLOWERING LOCUS T (FT) and SUPPRESSOR OF CONSTANS OVEREXPRESSION 1 (SOC1). Of the environmental factors, photoperiod is regarded the most important one in promoting floral transition in Arabidopsis thaliana and most labstrains will flower earlier under long day (LD) conditions than under short day (SD) conditions. Arabidopsis is therefore considered a facultative LD plant. To monitor gene expression changes during floral transition and early flower development plants were grown under SD (9 hr light, 15 hr dark) for 30 days. Plants were then shifted to LD (16 hr light, 8 hr dark) conditions to induce flowering. RNA was isolated from micro-dissected apical tissue harvested 0, 3, 5, and 7 days after the shift to LD and double-stranded cDNA was synthesized. Biotinylated cRNA probes were prepared and hybridized to the Affymetrix ATH1 array in duplicate (biological replicates). To study floral transition, we not only analyzed response of wildtype Landsberg erecta (Ler) plants, but also the effect of mutants in the flowering time genes CONSTANS (CO; co-2) and FT (ft-2). Early flower development was analyzed by comparing Col-0 wildtype plants with the meristem identity mutant lfy-12 (Col-0).

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Project description:The use of Biological Control Agents (BCAs) to cope diseases has received considerable attention owing to its high efficiency and environmental safety. The aim of our study was to investigate the potential role of the Pseudomonas mediterranea pre-treatments in the response of lemon [Citrus limon (L.) Burm. f.] against mal secco, this being a devastating citrus disease caused by the fungus Plenodomus tracheiphilus. RNAseq analysis revealed that the fungus induced a marked reprogramming of the transcriptome, but P. Mediterranea pre-treatments strongly reduced lemon leaf transcriptome modifications and limited the amount of the fungus DNA inside the plant tissue. Furthermore, P. mediterranea prevented the down regulation of the genes involved in the effector triggered immunity (ETI) and the deregulation of genes involved in the main phytohormone’s biosynthesis and perception. As far as we know, this work represents the first report on the analysis of P. tracheiphilus-lemon plant-BCA interaction at molecular level.

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