NtMTP1基因過表達(dá)對增強(qiáng)煙草Zn脅迫耐受性的研究
發(fā)布時間:2018-11-24 09:29
【摘要】:該研究采用實(shí)時熒光定量PCR(qRT-PCR)技術(shù),對煙草金屬耐受蛋白1(MTP1)基因(NtMTP1)在煙草不同組織以及不同質(zhì)量濃度ZnSO_4處理下的表達(dá)進(jìn)行了分析;利用農(nóng)桿菌介導(dǎo)法,將NtMTP1基因植物過表達(dá)載體pBI121-35S∶∶MTP1轉(zhuǎn)化野生型煙草,篩選得到NtMTP1基因過表達(dá)的轉(zhuǎn)基因煙草植株,并進(jìn)行不同質(zhì)量濃度ZnSO_4處理,檢測NtMTP1基因過表達(dá)對煙草Zn脅迫耐受性的影響。結(jié)果表明:NtMTP1基因在煙草中呈現(xiàn)組織特異性表達(dá),主要在花與葉中表達(dá);NtMTP1基因的表達(dá)受到Zn~(2+)誘導(dǎo),在400μmol/L ZnSO_4處理后,表達(dá)量達(dá)到最高,為對照組的3.81倍;3株轉(zhuǎn)基因煙草植株中NtMTP1基因表達(dá)量分別為野生型的10.42、7.61和11.84倍,與野生型相比,過表達(dá)植株對Zn脅迫的耐受性顯著增強(qiáng)。研究結(jié)果為闡明NtMTP1基因在煙草體內(nèi)Zn~(2+)轉(zhuǎn)運(yùn)過程中的生物學(xué)功能提供了重要依據(jù)。
[Abstract]:In this study, real-time fluorescent quantitative PCR (qRT-PCR) was used to analyze the expression of MTP1 gene (NtMTP1) in different tissues and different concentration of ZnSO_4 in tobacco. By Agrobacterium tumefaciens mediated transformation of NtMTP1 gene plant overexpression vector pBI121-35S::MTP1 into wild type tobacco, transgenic tobacco plants with NtMTP1 gene overexpression were screened and treated with different concentrations of ZnSO_4. The effects of overexpression of NtMTP1 gene on the tolerance of tobacco to Zn stress were detected. The results showed that the expression of NtMTP1 gene was tissue-specific in tobacco, mainly in flowers and leaves, the expression of NtMTP1 gene was induced by Zn~ (2), and the expression of NtMTP1 gene reached the highest level after 400 渭 mol/L ZnSO_4 treatment, which was 3.81 times of the control group. The expression of NtMTP1 gene in the three transgenic tobacco plants was 10.427.61 and 11.84 times of that of the wild type, respectively. Compared with the wild type, the tolerance of the overexpression plants to Zn stress was significantly increased. The results provide important basis for elucidating the biological function of NtMTP1 gene during Zn~ (2) transport in tobacco.
【作者單位】: 西南科技大學(xué)生命科學(xué)與工程學(xué)院;西南科技大學(xué)核廢物與環(huán)境安全國防重點(diǎn)實(shí)驗(yàn)室;
【基金】:國家自然科學(xué)基金(31500205) 西南科技大學(xué)博士研究基金(14zx7153);西南科技大學(xué)校長機(jī)動費(fèi)特殊資助(14zx1104) 四川省生物質(zhì)資源利用與改性工程中心項(xiàng)目(13zxsk02)
【分類號】:Q943.2
本文編號:2353146
[Abstract]:In this study, real-time fluorescent quantitative PCR (qRT-PCR) was used to analyze the expression of MTP1 gene (NtMTP1) in different tissues and different concentration of ZnSO_4 in tobacco. By Agrobacterium tumefaciens mediated transformation of NtMTP1 gene plant overexpression vector pBI121-35S::MTP1 into wild type tobacco, transgenic tobacco plants with NtMTP1 gene overexpression were screened and treated with different concentrations of ZnSO_4. The effects of overexpression of NtMTP1 gene on the tolerance of tobacco to Zn stress were detected. The results showed that the expression of NtMTP1 gene was tissue-specific in tobacco, mainly in flowers and leaves, the expression of NtMTP1 gene was induced by Zn~ (2), and the expression of NtMTP1 gene reached the highest level after 400 渭 mol/L ZnSO_4 treatment, which was 3.81 times of the control group. The expression of NtMTP1 gene in the three transgenic tobacco plants was 10.427.61 and 11.84 times of that of the wild type, respectively. Compared with the wild type, the tolerance of the overexpression plants to Zn stress was significantly increased. The results provide important basis for elucidating the biological function of NtMTP1 gene during Zn~ (2) transport in tobacco.
【作者單位】: 西南科技大學(xué)生命科學(xué)與工程學(xué)院;西南科技大學(xué)核廢物與環(huán)境安全國防重點(diǎn)實(shí)驗(yàn)室;
【基金】:國家自然科學(xué)基金(31500205) 西南科技大學(xué)博士研究基金(14zx7153);西南科技大學(xué)校長機(jī)動費(fèi)特殊資助(14zx1104) 四川省生物質(zhì)資源利用與改性工程中心項(xiàng)目(13zxsk02)
【分類號】:Q943.2
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