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Structure and function of rhizosphere and root endophyte microbial communities associated with healthy and root rot Panax notoginseng

ABSTRACT: Structure and function of rhizosphere and root endophyte microbial communities associated with healthy and root rot Panax notoginseng

PROVIDER: PRJEB46929 | ENA |

REPOSITORIES: ENA

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

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Structure and function of rhizosphere and root endophyte microbial communities associated with healthy and root rot Panax notoginseng

Project description:Structure and function of rhizosphere and root endophyte microbial communities associated with healthy and root rot Panax notoginseng

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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.

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