Tocopherol biosynthesis in senescing chloroplasts - a mechanism to protect envelope membranes against oxidative stress and a prerequistite for lipid remobilization?

机译：衰老的叶绿体中的生育酚生物合成-一种保护包膜抗氧化应激的机制以及脂质固定的先决条件吗？

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Analyses of tocopherols in flag leaves of barley cultivated in a field revealed that both alpha- and gamma-tocopherol accumulate with the beginning of senescence. Correspondingly one of the genes expressed during barley leaf senescence is coding for a key enzyme of the biosynthetic pathway leading to tocopherols and plastoquinones. This enzyme, 4-hydroxyphenylpyruvate dioxygenase, catalyzes the formation of homogentisate from 4-hydroxyphenylpyruvate, a product of the shikimate pathway. It is hypothesized that tocopherols acting as lipophilic antioxidants play an important role in differential stabilization of plastid envelope membranes over thylakoid membranes which become degraded during senscence. A model emphasizing the important function of envelope membranes for senescence associated remobilization of thylakoid lipids is presented.

机译：对在田间种植的大麦旗叶中生育酚的分析表明，α-和γ-生育酚都随着衰老的开始而积累。相应地，在大麦叶片衰老过程中表达的基因之一编码导致生育酚和质体醌的生物合成途径的关键酶。这种酶4-羟苯基丙酮酸双加氧酶催化由4-草酸酯途径的产物4-羟苯基丙酮酸形成尿黑酸。假设作为亲脂性抗氧化剂的生育酚在类囊体膜上质体包膜的差异稳定中起着重要作用，类囊体膜在感觉过程中降解。提出了一个模型，该模型强调了包膜对类囊体脂质的衰老相关动员的重要作用。

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《NATO Advanced Research Workshop on The Chloroplast: From Molecular Biology to Biotechnology Kolymbari-Chania, Crete, Greece 10-15 August 1998》|1998年|p.171-176|共6页
会议地点 Kolymbari-Chania(GR)
作者
B. Chrost; J. Falk; B. Kernebeck; H. Molleken; K. Krupinska;
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原文格式 PDF
正文语种 eng
中图分类 Q9;
关键词
senscence; oxidative stress; tocopherols; 4-hydroxyphenylpyruvate dioxygenase;

机译：感觉氧化应激生育酚; 4-羟苯基丙酮酸双加氧酶;

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1. Expression of ???3?￠????tocopherol methyltransferase in chloroplasts results in massive proliferation of the inner envelope membrane and decreases susceptibility to salt and metal?￠????induced oxidative stresses by reducing reactive oxygen species [J] . Henry Daniell, Shuangxia Jin Plant Biotechnology Journal . 2014,第9期

机译：在叶绿体中表达“ 3′-生育酚甲基转移酶”导致内被膜大量增殖，并通过减少活性氧而降低了对盐和金属诱导的氧化应激的敏感性。
2. Expression of gamma-tocopherol methyltransferase in chloroplasts results in massive proliferation of the inner envelope membrane and decreases susceptibility to salt and metal-induced oxidative stresses by reducing reactive oxygen species [J] . Jin Shuangxia, Daniell Henry Plant Biotechnology Journal . 2014,第9期

机译：丙卟酚甲基转移酶在叶绿体中的表达导致内部包膜膜的大量增殖，通过还原反应性氧物质降低对盐和金属诱导的氧化胁迫的敏感性
3. Expression of γ‐tocopherol methyltransferase in chloroplasts results in massive proliferation of the inner envelope membrane and decreases susceptibility to salt and metal‐induced oxidative stresses by reducing reactive oxygen species [J] . Shuangxia Jin, Henry Daniell Plant Biotechnology Journal . 2014,第9期

机译：γ-生育酚甲基转移酶在叶绿体中的表达导致内部包络膜的大量增殖，通过还原反应性氧物种降低盐和金属诱导的氧化胁迫的敏感性
4. Tocopherol biosynthesis in senescing chloroplasts - a mechanism to protect envelope membranes against oxidative stress and a prerequistite for lipid remobilization? [C] . B. Chrost, J. Falk, B. Kernebeck, NATO advanced research workshop on the chloroplast: From molecular biology to biotechnology . 1999

机译：在脑叶绿体中的生育酚生物合成 - 一种保护包膜膜免受氧化应激的机制和脂质重新化的先决条件？
5. The interaction of antifreeze proteins with chloroplast galactolipid model membranes during lipid thermotropic phase transitions and freezing [D] . Tomczak, Melanie Marie 2000

机译：脂质热致相变和冻结过程中抗冻蛋白与叶绿体半乳糖脂膜的相互作用
6. Expression of γ-tocopherol methyltransferase in chloroplasts results in massive proliferation of the inner envelope membrane and decreases susceptibility to salt and metal-induced oxidative stress by reducing reactive oxygen species [O] . Shuangxia Jin, Henry Daniell -1

机译：γ-生育酚甲基转移酶在叶绿体中的表达导致内膜的大量增殖并通过减少活性氧来降低对盐和金属诱导的氧化应激的敏感性
7. Expression of γ-tocopherol methyltransferase in chloroplasts results in massive proliferation of the inner envelope membrane and decreases susceptibility to salt and metal-induced oxidative stresses by reducing reactive oxygen species [O] . Shuangxia Jin, Henry Daniell 2014

机译：γ-生育酚甲基转移酶在叶绿体中的表达导致内部包络膜的大量增殖，通过还原反应性氧物种降低盐和金属诱导的氧化胁迫的敏感性
8. Transport of Ions Across the Inner Envelope Membrane of Chloroplasts. Final Report [R] . McCarty, R. E. 2004

机译：叶绿体内包膜膜的离子迁移。总结报告

Tocopherol biosynthesis in senescing chloroplasts - a mechanism to protect envelope membranes against oxidative stress and a prerequistite for lipid remobilization?

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