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首页> 外文期刊>Trends in Plant Science >Galactoglycerolipid metabolism under stress: a time for remodeling
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Galactoglycerolipid metabolism under stress: a time for remodeling

机译:压力下的半乳糖甘油脂代谢:重塑的时代

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摘要

Galactoglycerolipids are the predominant lipid building blocks of chloroplast membranes and are essential for plant growth. Plant chloroplasts harbor a constitutive set of UDP-Gal-dependent lipid galactosyltransferases that are responsible for the bulk of galactoglycerolipid biosynthesis. A set of paralogs is induced in response to phosphate deprivation, which leads to the remodeling of extraplastidic membranes with a partial replacement of phosphoglycerolipid by digalactosyldiacylglycerol. A third type of galactoglycerolipid biosynthetic enzyme, a UDP-Gal-independent galactoglycerolipid galactosyltransferase, was recently shown to be involved in freezing tolerance. Here, we look at how understanding of the regulation of galactoglycerolipid biosynthesis in chloroplasts by these multiple enzyme sets is rapidly evolving and discuss the increasingly recognized role of lipid remodeling in response to diverse abiotic stresses.
机译:半乳糖甘油脂是叶绿体膜的主要脂质结构单元,对植物生长至关重要。植物叶绿体包含一组构成UDP-Gal的脂质半乳糖基转移酶,负责半乳糖甘油脂的生物合成。响应磷酸盐缺乏,诱导一组旁系同源物,其导致通过半乳糖基二酰基甘油甘油部分替代磷酸甘油脂而重塑膜外膜。最近显示出第三种类型的半乳糖甘油脂生物合成酶,即不依赖于UDP-Gal的半乳糖甘油脂半乳糖基转移酶,涉及冷冻耐受性。在这里,我们了解了如何通过这些多种酶集合快速理解对叶绿体中半乳糖甘油脂生物合成的调控,并讨论了脂质重塑对各种非生物胁迫的日益认可的作用。

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