Frontiers in Plant Science (Jul 2016)
ZmLEA3 enhanced low temperature stress tolerance by protecting the activity of enzyme in transgenic tobacco
Abstract
Late embryogenesis abundant (LEA) proteins are a family of small highly hydrophilic proteins that accumulate at the onset of seed desiccation and in response to adverse conditions such as drought, salinity, low temperature or water deficit. In previous studies, we demonstrated that ZmLEA3 could enhance the transgenic tobacco tolerance to osmotic and oxidative stresses. Here, we demonstrated that the transcription of ZmLEA3 in the maize stems could be significantly induced by low temperature and osmotic stresses and by treatment with ABA and H2O2. Further study indicated that ZmLEA3 is a single copy gene in the maize genome. The ZmLEA3 protein could protect LDH activity at low temperatures. The overexpression of ZmLEA3 conferred tolerance to low temperature stress to transgenic tobacco, yeast (GS115) and E.coli (BL21).
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