草莓TCP转录因子家族生物信息学鉴定及基因表达分析
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甘肃农业大学青年导师基金(GAUQDFC201905);


Bioinformatics Identification and Expression Analysis of TCP Transcription Factor Family in Strawberry
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    摘要:

    TCP转录因子家族是植物特异的一类调控逆境胁迫的重要转录因子。该研究利用生物信息学方法对草莓TCP转录因子家族成员进行鉴定,采用qRTPCR方法检测转录因子家族在非生物胁迫中的表达,并对相应转录因子家族基因的结构和功能进行了预测,为探究TCP转录因子在森林草莓非生物胁迫中的作用奠定基础。结果显示:(1)从森林草莓(Fragaria vesca)基因组和凤梨草莓(Fragaria ananassa)基因组中分别筛选了18个和58个TCP基因,并根据基因在染色体上的位置分别命名为FvTCP1~FvTCP18和FaTCP1~FaTCP58,亚细胞定位显示TCP家族基因主要位于细胞核上。(2)qRTPCR分析表明,森林草莓家族基因对逆境胁迫具有响应作用,但不同成员在不同胁迫处理下的响应程度存在差异,FvTCP14在200 mmol·L-1 NaCl、10% PEG、100 μmol·L-1 ABA、4 ℃低温、40 ℃高温和100 mmol·L-1 H2O2处理下相对表达量极显著高于对照,分别是对照的43.78倍、166.73倍、38.39倍、265.87倍、626.24倍和451.85倍,表明FvTCP14响应干旱、盐、ABA、H2O2、低温和高温胁迫;另外发现,FvTCP12在4 ℃低温、100 μmol·L-1 ABA和100 mmol·L-1 H2O2胁迫下与对照相比呈下调趋势,推测FvTCP12基因对低温、ABA和H2O2胁迫具有负调控作用。研究表明,森林草莓TCP转录因子在不同逆境胁迫中的表达存在一定的差异。

    Abstract:

    TCP genes encode a plantspecific transcription factor family, which acts as a key role in regulating stress response. In this study, the members of TCP genes family were identified in the whole genome of strawberry by bioinformatics analysis, the qRTPCR was used to detect the expression of strawberry transcription factor family in abiotic stress, while gene structure and function of its corresponding transcription factor family genes were analyzed, to provide a foundation for exploring the role of TCP transcription factor in abiotic stress of Fragaria vesca. The results showed: (1) 18 strawberry genes (FvTCP) were identified from F. vesca genome and 58 strawberry genes (FaTCP) were also identified from F. ananassa genome. According to the subcellular localization,the TCP family genes were mainly located in the nucleus. (2) qRTPCR showed that the family genes had response to adversity stress effect, but different members response under different stress level. FvTCP14 tendency in 200 mmol·L-1 NaCl, 10% PEG, 100 μmol·L-1 ABA, 4 ℃, 40 ℃ and 100 mmol·L-1 H2O2 treatments were significantly upregulated, which were 43.78, 166.73, 38.39, 265.87, 626.24 and 451.85 times of the control, respectively which indicated that FvTCP14 strongly responded to drought stress, salt stress, ABA induction, H2O2, high and low temperature stresses. In addition, FvTCP12 were significantly downregulated after 4 ℃, 100 μmol·L-1 ABA and 100 mmol·L-1 H2O2 stress treatments, suggesting that this gene had a negative regulatory effect on low temperature, ABA and H2O2 stresses. It is found that the expression of FvTCPs were different when the encountered the adversity environments.

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张志强,卢世雄,马宗桓,等.草莓TCP转录因子家族生物信息学鉴定及基因表达分析[J].西北植物学报,2020,40(12):2031-2043

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  • 在线发布日期: 2021-01-26
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