宁夏农林科学院农业生物技术研究中心,银川 750002
国家自然科学基金项目(31560053);宁夏自治区农业育种专项(2014NYYZ01);宁夏农林科学院十三五重大科研项目(YES-16-0102);宁夏自然科学基金项目(NZ16123, NZ16122, NZ17124,NZ14210);宁夏农林科学院科技创新先导资金项目(NKYJ-17-03, NKYJ-17-07, NKYJ-17-19,DWHZC-2017002)
Agricultural Bio-Technology Centre, Ningxia Academy of Agriculture and Forestry Sciences, Yinchuan, 750002
Nation Science Foundation Project(31560053), Ningxia Agriculture Breeding Special Project(2014NYYZ01), Ningxia Academy of Agriculture and Forestry's 13th Five-Year Major Scientific Research Project (YES-16-0102), Ningxia Science Foundation Project (NZ16123, NZ16122, NZ17124,NZ14210), Ningxia Academy of Agriculture and Forestry Science and Technology Innovation Pilot Fund Project (NKYJ-17-03, NKYJ-17-07, NKYJ-17-19,DWHZC-2017002)
NAC转录因子参与植物非生物胁迫反应,是改良植物抗旱耐盐性的重要基因资源。本研究利用农杆菌介导法对马铃薯栽培种“大西洋”进行遗传转化,并用PEG-6000模拟干旱处理转基因和受体植株,初步从逆境应答基因和内源激素2方面对转基因株系进行了抗旱性分析。结果表明,在3个转基因株系中转HaNAC1基因马铃薯生长素(IAA、IBA)、细胞分裂素(IP、cZ)、茉莉酸(MEJA、JA-ILE)、水杨酸(MESA)、赤霉素(GA3)含量均显著或极显著高于受体(p<0.01,p<0.05),而脱落酸(ABA)含量显著低于受体(p<0.05)。抗逆相关基因荧光定量PCR分析表明,HaNAC1基因过表达植株中与胁迫应答相关的LEA3、DREB2A、RD29a、NCED1、KIN1和ERD11基因表达量与受体存在显著差异(p<0.01,p<0.05)。现有实验数据表明,转基因马铃薯中HaNAC1可能通过调节与胁迫响应相关的一系列基因表达,调控激素表达水平变化从而提高受体的抗旱性。研究结果为深入解析HaNAC1响应干旱胁迫的分子机制提供基础理论依据。
NAC transcription factors are involved in plant abiotic stress response and play important roles for improving plant drought and salt tolerance. Taking advantage of established agrobacterium-mediated transformation platform using the potato cultivar "Atlantic", we generated the transgenic potatoes by expressing Haloxylon ammodendron HaNAC1, and conducted tests for drought resistance with PEG-6000 simulated drought treatment. By analyzing the contents of endogenous hormones, these results showed significant increased content of auxin (IAA, IBA), cytokinin (IP, cZ), jasmonic acid (MEJA, JA-ILE), salicylic acid (MESA), gibberellin (GA3) in three transgenic potato lines if compare to the receptor line (p<0.01, p<0.05). The content of abscisic acid (ABA) was significantly lower than the receptor line. By analyzing the transcriptional level using quantitative PCR analysis, several stress-tolerant genes including NCED1, ERD11, RD29A, DREB2A, LEA3 and KIN1 showed the modified expression in HaNAC1 overexpressing plants to the receptors (p<0.01, p<0.05). Taken together, our results suggested that increased drought resistance by expressing HaNAC1 is associated with the different expression of stress-related genes and hormone content, thus providing a theoretical basis for further molecular mechanism analysis of HaNAC1 response to drought stress.
杨文静,巩檑,张丽,等.马铃薯异源表达梭梭HaNAC1基因提高抗旱性的功能解析[J].植物遗传资源学报,2019,20(4):1020-1025.
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