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Rhizosphere microbiome of Taxus yunnanensis in Tengchong and Wuxi in 2020

ABSTRACT: rhizosphere microbiome of Taxus yunnanensis in Tengchong and Wuxi in 2020 Raw sequence reads

PROVIDER: PRJNA731496 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR14620817_1.fastq.gz	Fastqsanger.gz
	SRR14620817_2.fastq.gz	Fastqsanger.gz
	SRR14620818_1.fastq.gz	Fastqsanger.gz
	SRR14620818_2.fastq.gz	Fastqsanger.gz
	SRR14620819_1.fastq.gz	Fastqsanger.gz

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Project description:Background：Taxol is an efficient anticancer drug; however, the accumulation of taxoids can vary hugely among Taxus species. The mechanism underlying differential accumulation of taxoids are largely unknown. Thus, the comparative analysis of the transcriptomes in three Taxus species, including T. media, T. mairei and T. cuspidata, was performed. Results:KEGG enrichment analysis revealed that the diterpenoid biosynthesis and cytochrome P450 pathways were significantly enriched in the differential expressed genes. Dynamic expressions of the taxol biosynthesis related genes might be a potential explanation for the interspecific differential accumulation of taxol and its derivatives. Besides, the sequences of several key enzymes were re-assembled based on independent transcriptomes from different Taxus species. Our data showed that sequence diversity may be another factor that determines the variations in taxoids. Furthermore, five jasmonic acid (JA) metabolism-related GO terms were analyzed. The differential expression of these JA-related transcription factors suggested distinct responses to exogenous MeJA applications in the three Taxus species. Conclusions:Our results revealed the comprehensive variations in the expression pattern and sequence similarity of the key genes involved in the metabolism of taxoids among different Taxus species. The data give us an opportunity to reveal the mechanism underlying the variations in the taxoid contents and to select the highest-yielding Taxus species.

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New Taxane Diterpenoids from Taxus yunnanensis.

Project description:Three hitherto unknown taxane diterpenoids, namely baccatin VIII (1), baccatin IX (2), and baccatin X (3), along with 10 known analogues were isolated from an ethanolic extract of the twigs and leaves of Taxus yunnanensis. The new structures were characterized based on extensive spectroscopic analysis. Compounds 1 and 2 were tested for their in vitro cytotoxicity against five human tumor cell lines, and 1 exhibited inhibitory effects on HL-60 and MCF-7, with IC50 values of 3.44 and 9.67 μM, respectively.

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