Journal
BIOLOGIA
Volume 65, Issue 5, Pages 755-759Publisher
VERSITA
DOI: 10.2478/s11756-010-0090-y
Keywords
antioxidation; dehydrin; environmental stresses; metal binding; radical scavenge; reactive oxygen species (ROS).
Categories
Funding
- National Natural Science Foundation of China [30670166]
- National Key Basic Research 973 Program of China [2009CB118500]
- Program for New Century Excellent Talents in University [NCET-05-0786]
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Plant antioxidation system is composed of a series of complex mechanisms, in which many antioxidants including some special proteins are involved. Dehydrins are a family of late embryogenesis abundant (LEA) proteins which usually accumulate in plants during late embryogenesis or in response to environmental stresses. They were suggested to be associated with specific protective functions in plant cells, such as preventing coagulation of macromolecules and maintaining integrity of crucial cell structures. In recent years, many studies implied that dehydrins also play an antioxidative role to alleviate oxidative damage in stressed plants. They were proposed to scavenge radicals directly and sequester metals which are sources for radical generation to avoid the production of reactive oxygen species (ROS). In this paper, we will discuss the novel putative role of dehydrins in plant antioxidation mechanisms and how dehydrins perform their antioxidative activity.
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