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ABSTRACT: Transcriptome of loquat petals at different stages

PROVIDER: PRJNA1242521 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR32877565_1.fastq.gz	Fastqsanger.gz
	SRR32877565_2.fastq.gz	Fastqsanger.gz
	SRR32877566_1.fastq.gz	Fastqsanger.gz
	SRR32877566_2.fastq.gz	Fastqsanger.gz
	SRR32877567_1.fastq.gz	Fastqsanger.gz

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Project description:Gerbera petals of inflorescence developmental stages 2, 4, 6, 7, 8, and 9 were compared against a reference sample that included same amount of mRNA from stages 1-11. Alltogether six comparisons were done each including two biological replicates with 3 technical replicates resulting alltogether 36 hybridizations. At least one of each biological replicate was dyeswap hybridization. This experiment was done in order to profile transcriptional changes that occur in petals from stage where they still divide until senescence of the cells. Developmental stages have been characterized by Helariutta et al. (1995).

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Production of Red Flower Rapeseed by Ectopic Expression of OvPAP2 Identified in Brassica napus-Orychophragmus violaceus Addition Line by Comparative Transcriptome Analysis

Project description:Oilseed rape is both an important oleaginous crop and agriculture sightseeing crop whereas has relatively scanty flower color. As natural ﬂavonoids, Anthocyanin are responsible for the attractive red, purple, and blue colors of various tissues in higher plants, especially for the ornamental plants flower. One Brassica napus-Orychophragmus violaceus disomic addition line (M4) obtained previously exhibits red petals whichresult from anthocyanin biosynthesis. Transcriptome analysis of M4, B. napus (H3), natural individuals of O. violaceus with purple petals (OvP) and white petals (OvW) revealed that most of structural genes for the anthocyanin synthesis were up-regulated in both M4 and OvP, especially key gene ANS in the last step. Reads assembling and sequence alignment showed that the regulatory DEG PAP2 in M4 was from the transcript of O. violaceus. OvPAP2 was transformed into Arabidopsis thaliana and B. napus driven by the CaMV35S promoter and the rape petal-specific prompter XY355. Transgenic A. thaliana plants showed different levels of purple pigments in most of the organs, including the petals, and transgenic B. napus flowers exhibited restricted accumulation of anthocyanins in stamens when driven by CaMV35S promoter, but generated both red petals and anthers driven by the XY355 promoter. These results provided a platform for expounding the anthocyanin biosynthesis pathway in B. napus petals and give a successful case for flower color modification of the agriculture sightseeing rape.

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Project description:To identify the regulatory steps that control chlorophyll accumulation, we compared gene expression in petals and leaves of chrysanthemum cultivars with different chlorophyll levels. Microarray analyses showed that the expression levels of chlorophyll biosynthesis genes encoding glutamyl-tRNA reductase, Mg-protoporphyrin IX chelatase, Mg-protoporphyrin IX monomethylester cyclase, and protochlorophyllorophyllide oxidoreductase were well associated with chlorophyll content: their expression levels were lower in white petals than in green petals, and were highest in leaves. Among chlorophyll catabolic genes, expression of STAY-GREEN, encoding Mg-dechelatase, which is a key enzyme controlling chlorophyll degradation, was considerably higher in white and green petals than in leaves. We searched for transcription factor genes whose expression was well related to chlorophyll level in petals and leaves and found several such genes.

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