新聞資訊

高通量SAR篩選體系面世

來自北京生命科學(xué)研究所,農(nóng)業(yè)大學(xué)的研究人員介紹了一種新的高通量的SAR篩選體系,以及這種方法在正向遺傳學(xué)中的應(yīng)用。這一研究成果公布Plant Physiology雜志上。

系統(tǒng)獲得性抗性 (Systemic Acquired Resistance,SAR) 是指植物初次受到病原菌侵染后在沒有受侵害的葉片上產(chǎn)生的對(duì)病原菌的廣譜性抗性。長(zhǎng)期以來一直缺少能直接針對(duì)SAR進(jìn)行的正向遺傳學(xué)篩選方法。

張躍林實(shí)驗(yàn)室建立了一種“涂和噴”的高通量的SAR篩選體系。這種“涂和噴”的實(shí)驗(yàn)簡(jiǎn)單方便,省時(shí)省力,可以應(yīng)用在正向遺傳學(xué)中。用這個(gè)方法進(jìn)行的大規(guī)模的正向遺傳學(xué)篩選篩到了若干已知的在植物**方面的突變體。包括6個(gè)fmo1突變體,4個(gè)ald1突變體,3個(gè)sid2突變體,1個(gè)pad4突變體和1個(gè)pbs3突變體。除此以外,還得到了一個(gè)CAMTA3的gain-of-function的突變體,他們將其命名為camta3-3D。camta3-3D表現(xiàn)出明顯的SAR缺陷,以及對(duì)**病原的顯著敏感性。CAMTA3過表達(dá)的株系也表現(xiàn)出對(duì)病原菌更加敏感的表型。這些都證明CAMTA3是一個(gè)在植物**中起到重要作用的負(fù)調(diào)節(jié)因子。

除此之外,今年年初張躍林實(shí)驗(yàn)室發(fā)表了“MOS11: mRNA出核運(yùn)輸中的一個(gè)新元件”文章,篩選到了擬南芥的先天**突變體snc1修飾子mos11,并揭示了mos11在mRNA出核運(yùn)輸中的關(guān)鍵作用,從而為深入了解mRNA出核運(yùn)輸分子機(jī)制提供了新思路,并有助于推動(dòng)科研人員開發(fā)出mRNA出核異常所致**的新**策略。

原文摘要:

Brush and Spray: A high throughput systemic acquired resistance assay suitable for large-scale genetic screening

Beibei Jing,Shaohua Xu,Mo Xu,Yan Li,Shuxin Li,Jinmei Ding andYuelin Zhang

Systemic acquired resistance (SAR) is a defense mechanism induced in the distal parts of plants after primary infection. It confers long-lasting protection against a broad spectrum of microbial pathogens. Lack of high-throughput assays has hampered forward genetic analysis of SAR. Here we report the development of an easy and efficient assay for SAR and its application in a forward genetic screen for SAR-deficient mutants. Using the new assay for SAR, we identified six fmo1, four ald1, three sid2, one pad4 and one pbs3 alleles as well as a gain-of-function mutant of CAMTA3 designated camta3-3D. Like transgenic plants over-expressing CAMTA3, camta3-3D mutant plants exhibit compromised SAR and enhanced susceptibility to virulent pathogens, suggesting that CAMTA3 is a critical regulator of both basal resistance and SAR.

滬公網(wǎng)安備 31011002002624號(hào)