擬南芥lncRNA-At5NC056820過表達(dá)載體構(gòu)建及其轉(zhuǎn)基因植株的抗旱性研究
[Abstract]:The overexpression vector of Arabidopsis thaliana At5NC056820 was constructed, and infected Arabidopsis thaliana with flower dipping method. Twelve over-expressed lines were successfully identified by semi-quantitative PCR, and the physiological indexes of transgenic plants under drought stress were determined. The drought resistance of transgenic plants was analyzed in order to clarify the response of At5NC056820 to drought stress and to provide the basis for further revealing the molecular mechanism of lncRNA affecting drought resistance of plants. The results showed that: (1) the vector containing At5NC056820 was successfully constructed and 12 positive plants were obtained. (2) the positive plants were verified by RCR that At5NC056820 had been overexpressed in Arabidopsis thaliana. The transgenic Arabidopsis thaliana A-3, A-7 and A-8 had better growth than wild type under drought treatment. (3) after drought treatment for 10 days, the free proline content of transgenic Arabidopsis thaliana was 2 429.58 渭 g / g ~ (-1). It was 2.5 times higher than the wild type. The chlorophyll content of transgenic Arabidopsis thaliana was 0.82mg g-1, which decreased by 48.9% on average and 63.0% by wild-type Arabidopsis thaliana. The malondialdehyde content of transgenic Arabidopsis thaliana was 2.15 mmol L ~ (-1) g ~ (-1), which was less 1.19mmol L ~ (-1) g ~ (-1) than that of wild type. The relative water content of transgenic Arabidopsis thaliana was 53.73, which was 19.0% less than that of wild type. The results show that lncRNA-At5NC056820 can improve drought tolerance of Arabidopsis thaliana to some extent.
【作者單位】: 西北農(nóng)林科技大學(xué)生命科學(xué)學(xué)院;
【基金】:神華集團(tuán)科技創(chuàng)新項(xiàng)目(01300/K403021408)
【分類號】:Q943.2
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