Trehalose and Abiotic Stress Tolerance
Trehalose and Abiotic Stress Tolerance
复制标题
DOI：
10.1007/978-1-4614-0634-1_14
复制
发表时间：
2012-01-01
期刊：
影响因子：
--
通讯作者：
Lluch, Carmen
中科院分区：
文献类型：
--
作者：
Lopez-Gomez, Miguel;Lluch, Carmen
海藻糖是一种非还原性二糖，存在于从细菌和真菌到无脊椎动物的各种生物体中，在这些生物体中，海藻糖作为能量来源以及渗透剂和/或蛋白质/膜保护剂。直到最近，海藻糖被认为是没有任何真实的意义在植物中，虽然遗传学研究已经证实了海藻糖代谢的基因在植物中的惊人丰富的存在，这导致提出海藻糖途径作为一个中心的代谢调节。多项研究已经将海藻糖与植物的非生物胁迫耐受性联系起来，不同的研究小组试图通过在重要作物如水稻、番茄和马铃薯中引入海藻糖生物合成基因来创造胁迫耐受性植物。海藻糖代谢的特殊情况是植物共生相互作用，如根瘤菌豆科共生，其中海藻糖已被描述为某些物种根瘤中的主要碳水化合物。近年来海藻糖代谢的发现表明海藻糖的生物合成在植物逆境响应中的重要性。
Trehalose is a nonreducing disaccharide present in diverse organisms ranging from bacteria and fungi to invertebrates, in which it serves as an energy source as well as an osmolyte and/or protein/membrane protectant. Until recently, trehalose was not thought to be of any real significance in plants, although genetic studies have confirmed the existence of surprising abundance of genes for trehalose metabolism in plants, which have led to propose trehalose pathway as a central metabolic regulator. Multiple studies have linked trehalose to abiotic stress tolerance in plants and different research groups have attempted to create stress tolerant plants by introducing trehalose biosynthetic genes in important crops such as rice, tomato, and potato. Particular cases of the trehalose metabolism are plant symbiotic interactions such as the rhizobia legume symbiosis, where trehalose has been described as a major carbohydrate in root nodules of some species. The discovery of trehalose metabolism in the recent years has pointed out the importance of trehalose biosynthesis in stress responses in plants.