|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Transgenic expression of MYB15 confers enhanced sensitivity to abscisic acid and improved drought tolerance in Arabidopsis thaliana显示文摘Abiotic stresses cause serious crop losses. Knowledge on genes functioning in plant responses to adverse growth conditions is essential for developing stress tolerant crops. Here we report that transgenic expression of MYB15, encoding a R2R3 MYB transcription factor in Arabidopsis thaliana, conferred hypersensitivity to exogenous abscisic acid (ABA) and improved tolerance to drought and salt stresses. The promoter of MYB15 was active in not only vegetative and reproductive organs but also the guard cells of stomata. Its transcript level was substantially upregulated by ABA, drought or salt treatments. Compared with wild type (WT) control, MYB15 overexpression lines were hypersensitive to ABA in germination assays, more susceptible to ABA-elicited inhibition of root elongation, and more sensitive to ABA-induced stomatal closure. In line with the above findings, the transcript levels of ABA biosynthesis (ABA1, ABA2), signaling (ABI3), and responsive genes (AtADH1, RD22, RD29B, AtEM6) were generally higher in MYB15 overexpression seedlings than in WT controls after treatment with ABA. MYB15 overexpression lines displayed improved survival and reduced water loss rates than WT control under water deficiency conditions. These overexpression lines also displayed higher tolerance to NaCl stress. Collectively, our data suggest that overexpression of MYB15 improves drought and salt tolerance in Arabidopsis possibly by enhancing the expression levels of the genes involved in ABA biosynthesis and signaling, and those encoding the stress-protective proteins. | Zhenhua Ding Shiming Li Xueli An Xin Liu Huanju Qin Daowen Wang | 2009 | Journal of Genetics and Genomics2009,36,1: | 42 |
| 2 | 普通小麦中双脱氢抗坏血酸还原酶(TaDHAR)基因的克隆与生化特性分析显示文摘利用同源克隆技术从六倍体普通小麦中获得了两个不同的双脱氢抗坏血酸还原酶(TaDHAR)基因的cDNA克隆。器官表达模式分析表明,这两个TaDHAR基因(暂时命名为TaDHAR1和TaDHAR2)在小麦根、茎、叶、幼穗以及开花后10d、20d和30d的种子中均有表达,为组成型表达基因。原生质体表达实验表明,两个基因的产物均可能定位在细胞质中。在细菌中表达并提纯了两个基因的重组蛋白。体外生化测定表明两个重组蛋白均具有将双脱氢抗坏血酸还原成抗坏血酸的能力,其最适pH为7.5,在37oC时的活性比25oC高,但25oC条件下pH6.0和7.0时,两个DHAR蛋白的活性显著不同。本研究的结果为进一步揭示TaDHAR基因在小麦抗坏血酸代谢中的生理作用奠定了基础。 | 余春梅 杨艳萍 刘鑫燕 周蓉 华梁 魏贺 丁胜杰 王道文 | 2009 | 生物工程学报2009,25,10: | 7 |
| 3 | AtTHIC, a gene involved in thiamine biosynthesis in Arabidopsis thaliana显示文摘抗神经炎素(维生素 B (1 )) 是为有机体的必要混合物。它包含嘧啶戒指结构和噻唑戒指结构。抗神经炎素的这二一半独立地被综合然后一起联合了。这里,我们报导 AtTHIC 的分子的描述,它在 Arabidopsis 涉及抗神经炎素生合成。AtTHIC 类似于 Escherichia 关口 i ThiC,它在初核质涉及嘧啶生合成。AtTHIC 的 Heterologous 表示能机能上地补充 E 的 thiC 大美人异种。关口 i。由在它的倡导者区域的 T-DNA 插入的 AtTHIC 表示的 Downregulation 在植物导致了抗神经炎素内容的激烈的减小,击倒的变异的 thic1 在正常文化条件下面显示出白化体(白叶子) 和致命的显型。thic1 异种能被抗神经炎素的补充救,它的缺点功能能被 AtTHIC cDNA 的表示补充。短暂表示分析表明 AtTHIC 蛋白质指向质体和叶绿体。AtTHIC 强烈在叶子,花和 siliques 被表示, AtTHIC 的抄写是外来的抗神经炎素调整的 down。在结论, AtTHIC 是在 Arabidopsis 的抗神经炎素生合成小径涉及嘧啶合成的基因,并且我们的结果为阐明提供一些新线索在植物的抗神经炎素生合成的小径。 | Danyu Kong Yuxing Zhu Huilan Wu Xudong Cheng Hui Liang Hong-Qing Ling | 2008 | Cell Research2008,18,5: | 4 |
| 4 | Overexpressing HRS1 Confers Hypersensitivity to Low Phosphate-Elicited Inhibition of Primary Root Growth in Arabidopsis thaliana显示文摘Phosphate (Pi) deficiency causes dramatic root system architecture(RSA) changes in higher plants.Here we report that overexpression of HRS1 leads to enhanced sensitivity to low Pi-elicited inhibition of primary root growth in Arabidopsis thaliana seedlings.Bioinformatic investigations uncovered that HRS1 and its six homologs encode putative G2-like transcription factors in Arabidopsis.Analysis of promoter::GUS reporter lines revealed that HRS1 transcripts were present mainly in the root hair region and root hair cells under Pi-sufficient conditions.Pi deprivation increased HRS1 expression level and expanded its expression domain.Although HRS1 knockout mutant did not differ from wild type(WT) control irrespective of Pi status,its overexpression lines were significantly more susceptible to low Pi-elicited primary root shortening.In both WT and HRS1 overexpression seedlings,low Pi-induced primary root shortening was accompanied by enhanced root hair cell differentiation,but this enhancement occurred to a greater extent in the latter genotype.Collectively,our data suggest that HRS1 may be involved in the modulation of primary root and root hair growth in Pi-deprived Arabidopsis seedlings,and provide useful clues for further research into the function of HRS1 and its homologs and the mechanisms behind RSA changes under Pi-deficient conditions. | Hong Liu Huixia Yang Chongming Wu Juanjuan Feng Xin Liu Huanju Qin Daowen Wang | 2009 | Journal of Integrative Plant Biology2009,51,4: | 3 |
| 5 | 活性氧介导的植物蛋白质氧化修饰研究进展显示文摘蛋白质翻译后修饰是机体蛋白发挥各种功能的重要先行步骤。逆境胁迫下活性氧可对氧化还原敏感的蛋白质进行可逆和不可逆的氧化修饰。可逆氧化修饰对逆境下植物生物功能的正常发挥乃至适应都至关重要,目前对活性氧调节植物蛋白质的可逆氧化修饰研究取得了相应进展。综述了植物蛋白质氧化修饰的方式位点及参与蛋白的调节机理,旨在阐明蛋白质可逆氧化修饰对植物抵御逆境造成的氧化胁迫的重大意义,同时概括对蛋白质可逆氧化修饰研究的有效方法。当前可以通过特定位点的突变实验和蛋白质组学的方法确定有无可逆氧化修饰并测定氧化修饰程度;未来以期通过综合实验控制参与反应的蛋白质来解析其还原及再生机理。 | 周文菲 白娟 龚春梅 | 2017 | 生物技术通报2017,33,4: | 2 |
| 6 | 普通小麦中一氧化氮相关因子(TaNOA)编码基因的克隆和分子生物学分析显示文摘一氧化氮是动植物体内重要的信号分子。本研究利用同源克隆技术从六倍体普通小麦中获得一个一氧化氮相关因子(TaNOA)编码基因的全长基因组和cDNA克隆。该基因具有13个外显子和12个内含子,与拟南芥以及水稻中同源基因结构相似。根据cDNA推导的氨基酸序列与拟南芥AtNOA1的序列一致性达60%以上,具备P-环GTPaseG4-G5-G1-G2-G3的排列特征和保守的序列。对其中2个内含子的测序分析表明在六倍体小麦中TaNOA至少有3个成员。进一步用中国春小麦缺体-四体材料将这3个TaNOA基因成员分别定位在第六同源群的6A、6B和6D染色体上,本研究中获得的成员定位于6B染色体上,因此将其命名为TaNOA-B1。原生质体表达实验表明,TaNOA-B1可能定位在线粒体中。TaNOA基因在小麦根、叶片中表达较高,在幼穗和小花中有少量表达,茎中几乎检测不到表达。TaNOA的转录本水平还因脱落酸或盐处理而上升,表明它可能参与小麦对非生物胁迫的反应。本研究为进一步克隆六倍体小麦中TaNOA的其他成员及研究该基因在小麦中的功能奠定了基础。 | 郝丽芳 余春梅 李斌 王道文 | 2010 | 生物工程学报2010,26,1: | 1 |
| 7 | 过氧化物酶2-Cys Peroxiredoxins的研究进展显示文摘Peroxiredoxins是最近发现的一类过氧化物酶家族,其中的一个亚类2-Cys Peroxiredoxins具有Peroxiredoxins的典型特征,在生物体内分布广泛且含量较多,可占哺乳动物细胞可溶性蛋白的1%,且具有独特的催化活性;此外2-Cys Peroxiredoxins具有抗氧化(清除活性氧)、信号传导和分子伴侣的功能,对生物体正常的生命活动起重要作用. | 张悦丽 李新国 李玲 万书波 王涛 | 2010 | 生命科学研究2010,14,6: | 1 |