黃瓜LRR型抗病相關(guān)蛋白基因的表達分析與載體構(gòu)建
[Abstract]:The cucumber is widely cultivated in the world, and its yield and quality are of great importance. Fusarium oxysporum f. sp. The cucumber fusarium wilt is difficult to control, and the yield and quality of the cucumber are severely restricted, so the research on the disease resistance mechanism of the cucumber is particularly important. In the early-stage experiment, when the root system of cucumber was resistant to Fusarium oxysporum under the stress of Fusarium oxysporum, a protein related to the resistance of cucumber fusarium wilt was identified (CsA UNM029170.1), and the protein was expressed as a member of the LRR-type protein family, and it was designated as CsLRR-pf1, and its CDS was 1317bp (GenBank accession number: Gi | 449450244). The promoter sequence of CsLRR-pfl was cloned and analyzed, and the expression of CsLRR-pfl was analyzed by using the technique. The prokaryotic expression vector and the GFP expression vector of CsLRR-pfl were constructed. In order to study the role and mechanism of the LRR-type disease-related protein in the defense of cucumber. The coding region and the promoter sequence of the CsLRR-pfl gene were cloned and the region sequence analysis of the CsLRR-pfl promoter was carried out using the PlantCARE on-line software. The results showed that the following regulatory elements were predicted in the antisense strand of the promoter upstream of the initiation codon ATG of the CsLRR-pfl gene:1 high-level expression-related element 5UTR Py-rich strecch;1 enhancement xylem and expression in the petal to inhibit the expression of the phloem-related elements AC-II; 4 anaerobic-induced cis-acting elements ARE;1 ATBP-1 binding related AT-rich element;1 TGAGTCA motif-related cis-acting element ATGCAAAT motif;1 auxin response-related cis-acting element AuxRR-core;1 fungal elicitor-related cis-acting element Box-W1; light response element G-box 2, GA-motif2, GATA-motif1, GT1-motif 1, MNF11, Spl2;2 thermal stress-related cis-acting element HSE;2 photoresponse-related MYB binding site MRE;37 CAAT-box;88 TATA-box;4 defense and stress response elements TC-rich repeats;1 injury and pathogen response element W box;1 endosperm expression required element Skn-1-motif; One biorhythm control related element, circle,1 gibberellin response element, P-box, and MeJA response-related cis-acting element CGTCA-motiv and two TGACG-motif. These regulatory elements are substantially uniformly distributed over the promoter sequence. The expression pattern of CsLRR-pfl gene under the stress of GA3, MeJA, SA, ETH and ABA was quantitatively analyzed. The expression of CsLRR-pf1 gene was analyzed based on the results of the prediction and the selection of five exogenous hormones and the infection of cucumber seedlings by Fusarium oxysporum. The expression of CsLRR-pf1 gene of F9 (high resistance to fusarium wilt) and 995 (high-sense fusarium wilt) was induced by Fusarium oxysporum. The expression of CsLRR-pf1 gene in 995 (high-sense fusarium wilt) was induced and the expression of CsLRR-pf1 gene in F9 was earlier than 995. At the same time, CsLRR-pf1 may be involved in the response of cucumber to Fusarium oxysporum. After treatment with GA3, MeA and SA, the CsLRR-pfl gene in F9 is induced to be expressed and the variation trend is the same, probably because the signal paths of SA, GA3 and MeJA cross with each other in the course of inducing plant defense response. However, after the ABA and ETH treatment, the expression patterns of the CsLRR-pfl genes in F9 and 995 were similar to those of the different treatments. The prokaryotic expression vector of the cucumber CsLRR-pfl was constructed and the expression vector of the prokaryotic expression vector was determined by Nde I/ HindIII double-enzyme digestion. At the same time, this gene and the GFP fusion expression vector were constructed, and the construction of the fusion expression vector was determined by the colony PCR and XbaI/ BamH I double-enzyme digestion and identification, and the basis for further study of the role of the LRR-type disease-related protein in the stress response was established.
【學(xué)位授予單位】:沈陽農(nóng)業(yè)大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2016
【分類號】:S436.421
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