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| 1 | 植物线粒体抗氧化应激效应影响的研究进展显示文摘线粒体是细胞进行呼吸作用的主要场所,通过氧化磷酸化途径产生ATP。在植物中,线粒体结构相对复杂,除参与呼吸作用外还对光合作用有促进作用。同时线粒体也是植物体内对外界环境最敏感的细胞器之一,外界环境的改变会使线粒体功能紊乱并发生氧化应激。线粒体作为植物体内参与氧化应激的重要细胞器,其功能紊乱将导致活性氧的增多,产生脂质过氧化损伤,影响抗氧化酶系活性及关键蛋白表达量的改变等。本文首先概述了植物细胞线粒体的结构组成,重点介绍了经典电子传递链复合物的构成。其次,介绍了电子传递链复合物的功能,并对线粒体中活性氧(ROS)的产生做了重点的概述。最后详细介绍了氧化应激如何影响植物线粒体三羧酸循环、氧化磷酸化、交替氧化途径中关键酶活性、蛋白以及相关基因的表达,并阐述了植物细胞中线粒体清除ROS的主要途径,包括抗氧化酶系、转录调节因子及相关的功能性蛋白的作用。 | 曾德永 崔杰 张萌 关双红 高鑫 山珊 刘梦瑶 孙野青 卢卫红 | 2018 | 江苏农业科学2018，46，21： | 5 |
| 2 | Expression of Mitochondrial Gene Fragments within the Tapetum Induce Male Sterility by Limiting the Biogenesis of the Respiratory Machinery in Transgenic Tobacco显示文摘Plant mitochondrial genomes (mtDNAs) are large and undergo frequent recombination events. A common phenotype that emerges as a consequence of altered mtDNA structure is cytoplasmic-male sterility (CMS). The molecular basis for CMS remains unclear, but it seems logical that altered respiration activities would result in reduced pollen production. Analysis of tobacco (Nicotiana tabacum) mtDNAs indicated that CMS-associated loci often contain fragments of known organellar genes. These may assemble with organellar complexes and thereby interfere with normal respiratory functions. Here, we analyzed whether the expression of truncated fragments of mitochondrial genes (i.e. atp4, cox1 and rps3) may induce male sterility by limiting the biogenesis of the respiratory machinery. cDNA fragments corresponding to atp4f, cox1f and rps3f were cloned in-frame to a mitochondrial localization signal and a C-termini HA-tag under a tapetum-specific promoter and introduced to tobacco plants by Agrobacterium-mediated transformation. The constructs were then analyzed for their effect on mitochondrial activity and pollen fertility. Atp4f , Cox1f and Rps3f plants demonstrated male sterility phenotypes, which were tightly correlated with the expression of the recombinant fragments in the floral meristem. Fractionation of native organellar extracts showed that the recombinant ATP4f-HA, COX1f-HA and RPS3f-HA proteins are found in large membrane-associated particles. Analysis of the respiratory activities and protein profiles indicated that organellar complex I was altered in Atp4f, Cox1f and Rps3f plants. | Felix Shaya Svetlana Gaiduk Ido Keren Sofia Shevtsov Hanita Zemah Eduard Belausov Dalia Evenor Moshe Reuveni Oren Ostersetzer-Biran | 2012 | Journal of Integrative Plant Biology2012，54，2： | 4 |
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