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The Functions of Arabinogalactan-Proteins in Angiosperms
Su-E Lin1,2, Li Huang1,2*, Jia-Shu Cao1,2
1Laboratory of Cell & Molecular Biology, Institute of Vegetable Science, Zhejiang University, Hangzhou 310029, China ;2Key Laboratory of Horticultural Plant Growth, Development and Quality Improvement,Ministry of Agriculture, Hangzho
Abstract: Arabinogalactan-proteins (AGPs) are oxyproline/hydroxyproline-rich (Hyp-rich) proteins which are highly glycosylated， present at the cell wall， plasma membrane and extracellular matrix (ECM) throughout the plant kingdom. AGPs are considered to be an important family of glycosidoproteins， implicated in diverse vegetative and reproductive processes， including somatic embryogenesis， cell expansion， programmed cell death， wound responses， root morphology， pollen tube growth， and plant hormonal signaling pathways. With the rapid development of plant structural genomics and functional genomics， we have known expression patterns and functions of AGPs at closer range. This paper first summarizes the molecular structure and classification of AGPs， then focuses on its functional research on vegetative growth， reproductive development， programmed cell death， and molecular interaction as well as signal transduction， using genomic sequence information analysis， forward and/or reverse genetic approach.
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