Project description:Catharanthus roseus produces a variety of indole alkaloids with significant biological activities. The indole alkaloids including catharanthine, vindolinine, ajmalicine and the precursor strictosidine were dramatically induced in the leaves following binary stress. To profile the modification of indole alkaloids in C. roseus seedlings under the binary stress of ultraviolet-B irradiation and dark incubation, gel-free proteomic analysis was carried out to uncover the underlying molecular mechanism.
Project description:The goal of this study is to investigate differential transcription profiles of leaf material/cells accumulating different levels of alkaloids in the anticancer plant Catharanthus roseus.
Project description:In previous work, cephalotaxine, harringtonine, homoharringtonine were shown to be accumulated differentially after various stimuli. Especially, after MeJA treatment, the concentration of 3 cephalotaxus alkaloids all showed decreasing. We speculated that the genes expressed lower after MeJA treatment might encode some enzymes responsible for the biosynthesis of cephalotaxus alkaloids. Therefore, choosing the sample treated with MeJA and the control sample for comparative iTRAQ analysis will greatly facilitate dissection of the genes involved in the biosynthesis of cephalotaxus alkaloids and even the acyl portions of cephalotaxus ester alkaloids. This approach is widely used for mining and identifying novel genes in the biosynthesis of secondary metabolites without genome data in plants.
Project description:This dataset belongs to a set of three RNA-Seq experiments that were carried out to study the regulation of monoterpenoid indole alkaloid production in the medicinal plant Catharanthus roseus. For this dataset, C. roseus flower petals were infiltrated with Agrobacterium tumefaciens C58C1 or infiltration buffer as control. For each sample, flower petals from four to five flowers, each from a different individual plant were infiltrated.
Project description:This dataset belongs to a set of three RNA-Seq experiments that were carried out to study the regulation of monoterpenoid indole alkaloid production in the medicinal plant Catharanthus roseus. For this dataset, C. roseus stems were dissected to separate the epidermis from the lower tissues. Leaves were dissected to obtain veins and veinless leaves. As controls, undissected leaves and stems were used. Three biological replicates were analyzed per sample.
Project description:This dataset belongs to a set of three RNA-Seq experiments that were carried out to study the regulation of monoterpenoid indole alkaloid production in the medicinal plant Catharanthus roseus. For this dataset, C. roseus hairy roots overexpressing the well-known MIA biosynthesis regulator ORCA3 were analyzed by RNA-Seq. As control, C. roseus hairy roots expressing GUS were used. Each analyzed sample consisted of an independent hairy root line; three hairy root lines per construct were analyzed.
Project description:Tanshinones and phenolic acids are crucial bioactive compounds biosynthesized in Salvia miltiorrhiza. Methyl jasmonate (MeJA) is an effective elicitor to enhance the production of phenolic acids and tanshinones simultaneously, while yeast extract (YE) is used as a biotic elicitor that only induce tanshinones accumulation. However, little was known about the different molecular mechanism. To identify the downstream and regulatory genes involved in tanshinone and phenolic acid biosynthesis, we conducted comparative transcriptome profiling of S. miltiorrhiza hairy roots treated with either MeJA or YE.Total 55588 unigenes were assembled from about 1.72 billion clean reads, of which 42458 unigenes (76.4%) were successfully annotated. The expression patterns of 19 selected genes in the significantly upregulated unigenes were verified by quantitative real-time PCR. The candidate downstream genes and other cytochrome P450s involved in the late steps of tanshinone and phenolic acid biosynthesis pathways were screened from the RNA-seq dataset based on co-expression pattern analysis with specific biosynthetic genes. Additionally, 375 transcription factors were identified to exhibit a significant up-regulated expression pattern in response to induction. This study can provide us a valuable gene resource for elucidating the molecular mechanism of tanshinones and phenolic acids biosynthesis in hairy roots of S.miltiorrhiza.