期刊
JOURNAL OF EXPERIMENTAL BOTANY
卷 61, 期 10, 页码 2603-2614出版社
OXFORD UNIV PRESS
DOI: 10.1093/jxb/erq091
关键词
Brefeldin A; COP II; Golgi apparatus; plastids; starch
资金
- BBSRC [BB/D001080/1]
- DFG
- BBSRC [BB/D001080/1] Funding Source: UKRI
- Biotechnology and Biological Sciences Research Council [BB/D001080/1] Funding Source: researchfish
Little is known about possible interactions between chloroplasts and the Golgi apparatus, although there is increasing evidence for a direct Golgi to chloroplast transport pathway targeting proteins to their destinations within the membranes and stroma of plastids. Here data are presented showing that a blockage of secretion results in a significant increase of starch within plastids. Golgi disassembly promoted either by the secretory inhibitor brefeldin A or through an inducible Sar1-GTP system leads to dramatic starch accumulation in plastids, thus providing evidence for a direct interaction between plastids and Golgi activity. The possibility that starch accumulation is due either to elevated levels of cytosolic sugars because of loss of secretory Golgi activity or even to a blockage of amylase transport from the Golgi to the chloroplast is discussed.
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