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Nitrate fertilizer alleviates ammonium toxicity by enhancing ACLA-3 in Panax notoginseng roots

ABSTRACT: Nitrate fertilizer alleviates ammonium toxicity by enhancing ACLA-3 in Panax notoginseng roots

PROVIDER: PRJNA446030 | ENA |

REPOSITORIES: ENA

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Nitrate fertilizer alleviates ammonium toxicity by enhancing ACLA-3 in Panax notoginseng roots

Project description:Nitrogen is one of the essential elements for plant growth. NH4+ and NO3- are two major forms of absorbing element N for higher plants. In this study we found that the growth of Panax notoginseng is inhibited when only adding ammonium nitrogen fertilizer, and adding nitrate fertilizer can alleviate the toxicity caused by ammonium. We use RNA-seq to identify genes that are related to the alleviated phenotypes after introducing NO3- to Panax notoginseng roots under NH4+ stresses. Twelve RNA-seq profiles in four sample groups, i.e., control, samples treated with NH4+, samples treated with NO3- only, and treated with both NH4+ and NO3- were obtained and analyzed to identify deregulated genes in samples with different treatments. ACLA-3 gene is downregulated in NH4+ treated samples, but is upregulated in samples treated with NO3- and with both NH4+ and NO3-, which is further validated in another set of samples using qRT-PCR. Our results suggest that unbalanced metabolism of nitrogen and nitrogen is the main cause of ammonium poisoning in roots of Panax notoginseng, and NO3- may significantly upregulate the activity of ACLA-3 which subsequently enhances the citrate cycle and many other metabolic pathways in Panax notoginseng root. These potentially increase the integrity of the Panax notoginseng roots. Our results suggest that introducing NO3- fertilizer is an effective means to prevent the occurrence of toxic ammonium in Panax notoginseng root.

2019-12-31 | GSE112437 | GEO

Effect of Panax Notoginseng on gene expression in rats with cerebral ischemia-reperfusion injury

Project description:Methods: Panax notoginseng was used to treat MCAO model rats, and the differentially expressed genes between Panax notoginseng group and model group were identified by RNA SEQ, and the possible mechanism of Panax notoginseng in regulating ischemic stroke was analyzed

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Phased secondary small interfering RNAs in Panax notoginseng

Project description:Recent results demonstrated that either non-coding or coding genes generate phased secondary small interfering RNAs (phasiRNAs) guided by specific miRNAs. Till now, there is no studies for phasiRNAs in Panax notoginseng (Burk.) F.H. Chen (P. notoginseng), an important traditional Chinese herbal medicinal plant species. Here we performed a genome-wide discovery of phasiRNAs and its host PHAS loci in P. notoginseng by analyzing small RNA sequencing profiles. Degradome sequencing profile was used to identify the trigger miRNAs of these phasiRNAs and potential targets of phasiRNAs. We also used RLM 5'-RACE to validate some of the identified phasiRNA targets. After analyzing 24 small RNA sequencing profiles of P. notoginseng, 204 and 90 PHAS loci that encoded 21 and 24 nucleotide (nt) phasiRNAs were identified. Furthermore, we found that phasiRNAs produced from some pentatricopeptide repeat-contain (PPR) genes target another layer of PPR genes as validated by both the degradome sequencing profile and RLM 5'-RACE analysis. We also find that miR171 with 21 nt triggers the 21 nt phasiRNAs from its conserved targets. We validated that some phasiRNAs generated from PPRs are functional by targeting other PPRs in trans. These results provide the first set of PHAS loci and phasiRNAs in P. notoginseng, and enhance our understanding of PHAS in plants.

2018-02-14 | GSE98118 | GEO

RNA illumina sequencing of Panax notoginseng under CK and Cd stress treatment

Project description:The total RNA were extracted from tissues of roots from several plants of Panax notoginseng under CK and Cd stress treatment by using TRIzol reagent (Invitrogen) according to the manufacturer's instructions. The purified PCR product was sequenced using Illumina Genome Analyzer II. The qualified reads were used to study of Panax notoginseng transcriptome under CK and Cd stress treatment.

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Early transcriptional responses of Arabidopsis thaliana to ammonium and nitrate deprivation

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Early transcriptional responses of Arabidopsis thaliana to ammonium and nitrate deprivation

Project description:Identification of the earliest transcriptional responses of adult Arabidopsis plant roots towards N-deprivation. Hydroponically grown Plants (35 days old) were 5 days adapted to nitrate or ammonium,respectively, as sole N-source to detect N-form specific transcripts. 24 Samples: 2 Pre-Treatments (5 Day adaptation to 3mM Ammonium/Nitrate) x 3 sampling time-points (0min, 15 min, 180 min) x 3 independent replications per time-point + 6 additional controls (2 x 15min, 1x 180min per Pre-Treatment)

2016-05-31 | E-GEOD-73903 | biostudies-arrayexpress

The signal transduction protein PII controls ammonium, nitrate and urea uptake in cyanobacteria

Project description:PII signal transduction proteins are widely spread among all domains of life where they regulate a multitude of carbon and nitrogen metabolism related processes. Non-diazotrophic cyanobacteria can utilize a high variety of organic and inorganic nitrogen sources. In recent years, several physiological studies indicated an involvement of the cyanobacterial PII protein in regulation of ammonium, nitrate/nitrite and cyanate uptake. However, direct interaction of PII has not been demonstrated so far. In this study, we used biochemical, molecular genetic and physiological approaches to demonstrate that PII regulates all relevant nitrogen uptake systems in Synechocystis sp. strain PCC 6803: PII controls ammonium uptake by interacting with the Amt1 ammonium permease, probably similar to the known regulation of E. coli ammonium permease AmtB by the PII homologue GlnK. We could further clarify that PII mediates the ammonium- and dark-induced inhibition of nitrate uptake by interacting with the NrtC and NrtD subunits of the nitrate/nitrite transporter NrtABCD. We further identified the ABC-type urea transporter UrtABCDE as novel PII target. PII interacts with the UrtE subunit without involving the standard interaction surface of PII interactions. The deregulation of urea uptake in a PII deletion mutant causes ammonium excretion when urea is provided as nitrogen source. Furthermore, the urea hydrolyzing urease enzyme complex appears to be coupled to urea uptake. Overall, this study underlines the great importance of the PII signal transduction protein in the regulation of nitrogen utilization in cyanobacteria.

2019-07-10 | PXD013411 | Pride

Measuring transcriptional differences between Caulobacter crescentus cultured in nitrate versus ammonium as the sole nitrogen source

Project description:This study is measuring the steady-state levels of mRNA in wild-type Caulobacter crescentus grown in M2 defined medium containing either ammonium or nitrate as the sole nitrogen source.

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Comparative transcriptomics for growth of engineered Pseudomonas putida strains when grown using ammonium or nitrate nitrogen sources

Project description:We report the transcriptomic profiles of 2 different Pseudomonas putida derivatives when they are grown in MME medium supplemented with either ammonium or nitrate as the sole nitrogen source. Expression of both heterologous and native genes are examined.

2021-01-12 | GSE147420 | GEO

Panax notoginseng

Project description:Panax notoginseng Transcriptome

| PRJNA228978 | ENA