乙烯響應(yīng)因子ERF057和ERF080調(diào)控葡萄抗寒性的機(jī)理研究
[Abstract]:Vitis Verifera L. is one of the important fruit tree crops in China, and the winter low temperature drought in the northern region, while the main varieties of the cultivation are poor, the winter needs to be buried, and the production cost and planting risk are greatly increased. The research shows that the effect of gas-hormone ethylene plays an important role in the response of plant biology and abiotic stress, and ERF (ERF) transcription factor downstream of ethylene signaling pathway can regulate the expression of stress-related genes, thus improving the stress resistance of plants. In this study, Vitis viniferae (V. amurensis) and Flos Rosae Rugosae (V. vinifera cv. The effects of low temperature stress on the biosynthesis of ethylene biosynthesis, and the effects of exogenous ethylene precursor 1-aminocyclopropane-1-carboxyllic acid (ACC) and ethylene synthesis inhibitor, aminoethylvinylglycine (AVG) on grape yield were studied. ERF transcription factor ERRF057 and ERF080 were cloned into two grapes, and the expression patterns were analyzed under different stress conditions. The function of VaERRF057 was studied by ectopic expression and the possible downstream gene was analyzed by RNA-seq. The main results obtained were as follows: 1. Under low temperature stress, the grape and Flos Rosae Rugosae Ethylene release, ACC content and ACO activity were measured. The results showed that low temperature stress could promote the synthesis of ACC and activate the activity of ACO, which resulted in an increase in the synthesis rate of endogenous ethylene in grapes. evaluation of mountain grapes by measuring the relative conductivity and calculating the semi-lethal temperature Flos Rosae Rugosae The results of ACC and AVG treatment showed that the addition of ACC could significantly improve the quality of Vitis vinifera. Flos Rosae Rugosae The addition of AVG adds to the mountain grapes and Flos Rosae Rugosae the above results show that ethylene is controlling the tolerance of grapes to low temperature stress. Flos Rosae Rugosae Two ERF transcription factors ERRF057 and ERF080 were cloned. It was found that ERF057 and ERF080 each contain 1 highly conserved AP2/ ERF domain consisting of 59 amino acids. ERRF057 and ERF080, respectively, belong to the ERF transcription factors of the class VII and the second subclasses, which may have biological functions similar to their respective homologous proteins, participate in biological and non-biological stress responses in grapes, and analyze the expression patterns of ERRF057 and ERF080 under different stress treatments using fluorescence quantitative RT-PCR. The results showed that both low temperature and exogenous ACC could induce mountain grape and Flos Rosae Rugosae The up-regulated expression of ERRF057 and ERF080, while the addition of AVG, completely inhibited the induction of low temperature on ERRF057 and ERRF080 expression. Since low temperature can induce the accelerated synthesis of endogenous ethylene in grapes, it is deduced that the upregulation of ERRF057 and ERF080 under low temperature conditions may depend on the biosynthesis of endogenous ethylene. 4. VaERR057 and VaERRF080 are transferred to Arabidopsis using Agrobacterium-mediated method. The results showed that the expression of VaERRF057 and VaERF080 significantly improved the frost resistance of Arabidopsis thaliana. The content of MDA in transgenic Arabidopsis plants was significantly lower than that of wild type and no-load, while the activity of SOD, POD and CAT was significantly higher than that of wild-type and no-load, indicating that VaERRF057 and VaERRF080 could improve the tolerance of transgenic Arabidopsis by reducing the degree of lipid peroxidation of plant membrane and enhancing its ability to remove ROS. The ability of VaERR057 to bind to GCC-box and DRE elements was demonstrated by using yeast single hybridization technique. Transcriptional group analysis indicated that the expression of VaERR057 resulted in a significant increase in the expression of 89 genes in Arabidopsis, and the expression of 51 genes was down-regulated. These genes included the key genes of low-temperature signal pathway and the downstream gene of the ethylene signaling pathway. The promoter analysis indicated that 24 genes contained GCC-box, and 54 genes had at least one DRE core sequence. It is suggested that VaERRF057 can regulate the expression of downstream gene by binding GCC-box or DRE element to participate in the response of transgenic plant to low temperature stress.
【學(xué)位授予單位】:中國科學(xué)院研究生院(武漢植物園)
【學(xué)位級(jí)別】:博士
【學(xué)位授予年份】:2016
【分類號(hào)】:S663.1
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