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淀粉的生物发生和降解：I. 马铃薯块茎成熟和贮藏过程中淀粉体膜的命运。

Biogenesis and Degradation of Starch: I. The Fate of the Amyloplast Membranes during Maturation and Storage of Potato Tubers.

机构信息

Department of Biological Chemistry, The Hebrew University of Jerusalem, Jerusalem, Israel.

出版信息

Plant Physiol. 1971 Apr;47(4):465-77. doi: 10.1104/pp.47.4.465.

DOI:10.1104/pp.47.4.465
PMID:16657644
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC396710/
Abstract

Storage of mature or developing potato tubers (Solanum tuberosum "Up-to-Date" variety) at 4 C causes a reduction in the starch content and the elevation in the level of free sugars. This phenomenon is not observed when the tubers are stored at 25 C. Changes in the morphology of cells from developing or mature tubers after storage at 4 or 25 C have been followed by electron microscopy. During all stages of the tuber development the starch granules are surrounded by a membrane derived from the plastid envelope. Storage in the cold induces disintegration of this membrane. A membrane fraction isolated from starch granules of tubers stored at 4 C has a lower buoyant density, and the electrophoretic pattern of its proteins is different from that of a similar membrane fraction obtained from tubers stored at 25 C. It is suggested that the cold-induced changes in the starch and sugar content during storage of potato tubers might be correlated with damage to the membranes surrounding the starch granules and changes in their permeability to degradative enzymes and substrates.

摘要

将成熟或发育中的马铃薯块茎（Solanum tuberosum“Up-to-Date”品种）储存在 4°C 下会导致淀粉含量降低和游离糖水平升高。当块茎储存在 25°C 下时，不会观察到这种现象。通过电子显微镜观察了在 4°C 或 25°C 下储存后发育或成熟块茎细胞形态的变化。在块茎发育的所有阶段，淀粉颗粒都被来自质体包膜的膜包围。冷藏会导致这种膜的解体。从储存在 4°C 的块茎淀粉颗粒中分离出的膜部分具有较低的浮力密度，并且其蛋白质的电泳模式与从储存在 25°C 的块茎中获得的类似膜部分的电泳模式不同。有人认为，在马铃薯块茎冷藏储存过程中淀粉和糖含量的变化可能与包围淀粉颗粒的膜的损伤以及它们对降解酶和底物的通透性的变化有关。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/24a7/396710/eec8b69f2afc/plntphys00183-0024-a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/24a7/396710/6631b609ac71/plntphys00183-0015-a.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/24a7/396710/4b83da415ef3/plntphys00183-0018-a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/24a7/396710/0a7cd65d63e7/plntphys00183-0019-a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/24a7/396710/5043c315b3bf/plntphys00183-0020-a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/24a7/396710/d86df1d578f1/plntphys00183-0021-a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/24a7/396710/eec8b69f2afc/plntphys00183-0024-a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/24a7/396710/6631b609ac71/plntphys00183-0015-a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/24a7/396710/5d1f9ecd6dd9/plntphys00183-0016-a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/24a7/396710/9faff4873493/plntphys00183-0017-a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/24a7/396710/4b83da415ef3/plntphys00183-0018-a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/24a7/396710/0a7cd65d63e7/plntphys00183-0019-a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/24a7/396710/5043c315b3bf/plntphys00183-0020-a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/24a7/396710/d86df1d578f1/plntphys00183-0021-a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/24a7/396710/eec8b69f2afc/plntphys00183-0024-a.jpg

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