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lncRNA lnc12 and application thereof in regulation of development of adventitious roots of poplar

A reaction and sequence technology, applied in the field of plant molecular and molecular biology, can solve the problem of less lncRNA clones, and achieve the effect of delaying the rooting time and reducing the rooting rate.

Active Publication Date: 2020-02-07
NANJING FORESTRY UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of the deficiencies in technology, the purpose of the present invention is to provide a lncRNA lnc12, and to explore its application in regulating the development of poplar adventitious roots, to solve the problem of few plant lncRNA clones in the prior art, and to provide lncRNA regulation of adventitious roots of forest trees. Formation and development provide functional verification

Method used

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  • lncRNA lnc12 and application thereof in regulation of development of adventitious roots of poplar
  • lncRNA lnc12 and application thereof in regulation of development of adventitious roots of poplar
  • lncRNA lnc12 and application thereof in regulation of development of adventitious roots of poplar

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Example 1 Using RACE technology to clone the full length of lnc12

[0031] 1. RNA extraction

[0032] RNA extraction from the stem (CKS), 1-week-old root (1WR) and 2-week-old root (2WR) of poplar tissue-cultured seedlings of ‘Nanlin 895’.

[0033] 2. Preparation of RACE-Ready cDNA

[0034] RACE-specific primers were designed according to the sequence of lnc12 obtained by high-throughput sequencing. The design principles are: the primer length is 23-28nt, the GC content is 50%-70%, and the annealing temperature T m ≥65°C (Tm≥70°C if using touch down PCR). Use Oligo 6 software to design primers, and the primers used are shown in Table 1:

[0035] Table 1 5'RACE and 3'RACE primers of lnc12

[0036]

[0037] 1) Preparation of Buffer Mix: 4.0 μL of 5×First-Strand Buffer, 0.5 μL of DTT (100 mM), 1.0 μL of dNTP (20 mM), the total volume is 5.5 μL.

[0038] 2) Master Mix preparation: Buffer Mix 5.5μL, RNase Inhibitor 0.5μL, SMART Scribe TM Reverse Transcriptase 2.0 μL...

Embodiment 2

[0072] Example 2 Coding ability prediction and verification of lnc12

[0073] 1. lnc12 coding ability and conservative prediction

[0074]The 5'RACE and 3'RACE sequences of lnc12 were spliced ​​using BioEdit software to obtain the full-length cDNA sequence of lnc12. Primers were designed for the full-length cDNA sequence of spliced ​​lnc12 and verified by sequencing (Table 2). The open reading frame was predicted by NCBI ORFfinder. The coding ability of lnc12 was predicted by CPC software, and the bioinformatics software RegRNA2.0 (http: / / regrna2.mbc.nctu.edu.tw / detection.html) was used to predict whether lnc12 had a ribosome binding site. BlastP was used to perform a similarity search on the possible encoded amino acid sequences of the small open reading frame (short ORF, sORF) of lnc12. The domain of the sORF of lnc12 was predicted using the Pfam database. Search lnc12 in the NONCODE database to predict its conservation. Use Oligo6 to design primers for the predicted sO...

Embodiment 3

[0097] Embodiment 3 poplar protoplast and transformation

[0098] 1. Isolation of poplar protoplasts

[0099] 1) Add in a 10mL centrifuge tube: 200mM MES 500μL, 0.8mol / L mannitol 3.75mL, ddH 2 O 75 μL, 0.2mol / L KCl 500 μL;

[0100] 2) 70°C water bath for 3-5 minutes;

[0101] 3) Add 100 μL cellulase and 25 μL pectinase while hot;

[0102] 4) After 10 minutes in a water bath at 55°C, place on ice and cool to room temperature;

[0103] 5) Add 1mol / L MgCl 2 50 μL, 0.005 g of bovine serum albumin, mix well and filter sterilize.

[0104] 2. Enzymatic hydrolysis of poplar leaves

[0105] 1) Select about 40 days old and well-grown 'Nanlin 895' poplar tissue culture seedling leaves for the preparation of protoplasts;

[0106] 2) Cut the blade into 0.5-1mm wide leaf strips with a blade;

[0107] 3) After the leaves are cut, they are put into the enzyme solution in a stretched state, and cultured in the dark at 28°C for 3 hours;

[0108] 4) Add precooled 5mL W5 solution (2mM M...

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Abstract

The invention discloses lncRNA lnc12 and application thereof in regulation of development of adventitious roots of poplar, and relates to the technical field of plant molecular biology. The lncRNA lnc12 is obtained through cloning by an RACE technology, a cDNA total-length sequence of the lncRNA lnc12 is shown in SEQ ID NO:1, and one small open reading frame with length of 159 bp exists. Construction of 35S::lnc12 sORF-GFP and 35S::lnc12 5'UTR+sORF-GFP vectors and transient expression verification in protoplasts of poplar find that the lnc12 has no encoding capacity. Through lnc12 overexpression vector constructon, stable inheritance conversion of poplar and positive plant screening, lnc12 overexpression transgenic poplar is obtained, the micro-cutting rooting time of the poplar is obviously delayed, the rooting rate is significantly reduced, and the number of adventitious roots and root hair thereof is smaller than that of control plants.

Description

technical field [0001] The invention relates to the technical field of plant molecular biology, in particular to an lncRNA lnc12 and its application in regulating the development of poplar adventitious roots. Background technique [0002] Long non-coding RNA (long ncRNA, lncRNA) refers to a non-coding RNA with a length greater than 200nt, no long open reading frame, and no coding ability, but some lncRNAs can encode functional polypeptides. Unlike miRNA, which has been studied thoroughly, lncRNA research started relatively late. Initially, lncRNA was not taken seriously, and was once regarded as a transcriptional "noise" without function. However, since the first lncRNA in the human body was reported by Lukiw et al. (1992), a series of recent studies have shown that lncRNA plays an important role in many life activities and developmental processes. [0003] There are more and more studies on lncRNA in mammals, but less research on lncRNA in plants, mainly focusing on a few...

Claims

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Application Information

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IPC IPC(8): C12N15/113C12N15/82C12N15/11A01H5/06A01H6/00C12N1/21
CPCC12N15/113C12N15/8218C12N15/8261C12N2310/317
Inventor 祁浩然刘思安吴玲胥猛
Owner NANJING FORESTRY UNIV
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