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首页> 外文期刊>Current Science: A Fortnightly Journal of Research >Complexities of invertases controlling sucrose accumulation andTI Complexities of invertases controlling sucrose accumulation and retention in sugarcane
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Complexities of invertases controlling sucrose accumulation andTI Complexities of invertases controlling sucrose accumulation and retention in sugarcane

机译：控制蔗糖积累和蔗糖转化酶的复杂性控制蔗糖积累和保留蔗糖转化酶的复杂性

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摘要

Sugarcane is one of the most important cash crops capable of accumulating up to 25% sucrose (w/w) on fresh weight basis. Studies in sugarcane have shown that significant effects are exerted on the sucrose cycle by the enzymes, sucrose phosphate synthase (SPS), sucrose synthase (SS) and invertases, collectively responsible for the synthesis and breakdown of sucrose in the various cellular compartments. Although sucrose is synthesized in the cytosol by SPS or SS, its distribution to various degrees between the apoplast, the cytosol and the vacuole of the storage parenchyma is monitored and controlled by invertases (beta-fructofuranosidase). In storage sinks, invertase activity is important for creating a sucrose concentration gradient from the phloem to the sink tissue, and then maintaining the storage sink for promoting phloem unloading. With this perspective, precise manipulation of invertases may be adopted to siphon high accumulation of sucrose in stalks. This review highlights the emerging role of invertases in sugarcane and recent upsurge on transgenic research including RNAi approach and their impact on sucrose content in sugarcane.
机译：甘蔗是最重要的经济作物之一，能够以鲜重计积累高达25％的蔗糖（w / w）。对甘蔗的研究表明，酶，蔗糖磷酸合酶（SPS），蔗糖合酶（SS）和转化酶对蔗糖循环产生了显着影响，这些酶共同负责各种细胞室中蔗糖的合成和分解。尽管蔗糖是通过SPS或SS在细胞质中合成的，但蔗糖在质外体，细胞质和储藏薄壁组织的液泡之间的不同程度分布都通过转化酶（β-果糖呋喃糖苷酶）进行监控。在储水槽中，转化酶活性对于建立从韧皮部到水槽组织的蔗糖浓度梯度，然后维持储水槽以促进韧皮部的卸载很重要。从这个角度来看，可以采用对蔗糖酶的精确操作来虹吸秸秆中蔗糖的大量积累。这篇综述着重介绍了蔗糖中蔗糖酶的新兴作用以及最近的转基因研究（包括RNAi方法）及其对蔗糖中蔗糖含量的影响。

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