期刊名称：Proceedings of the National Academy of Sciences
印刷版ISSN：0027-8424
电子版ISSN：1091-6490
出版年度：1998
卷号：95
期号：22
页码：12995-12999
DOI：10.1073/pnas.95.22.12995
语种：English
出版社：The National Academy of Sciences of the United States of America
摘要：Plant cell vacuoles may have either storage or degradative functions. Vegetative storage proteins (VSPs) are synthesized in response to wounding and to developmental switches that affect carbon and nitrogen sinks. Here we show that VSPs are stored in a unique type of vacuole that is derived from degradative central vacuoles coincident with insertion of a new tonoplast intrinsic protein (TIP), {delta}-TIP, into their membranes. This finding demonstrates a tight coupling between the presence of {delta}-TIP and acquisition of a specialized storage function and indicates that TIP isoforms may determine vacuole identity.
