Molecular Identification and Characterization of TAAZI1: A Novel Wheat Ortholog of Lipid Transfer Protein ATAZI1

LTPs are induced during a wide range of biotic or abiotic stress. Very few LTPs have been shown to act through plasma membrane receptors or to be involved in the hypersensitive response (HR). AZI1, a lipid transfer protein (LTP) interacts with MPK3 to form protein complexes and thereby plays a pivotal role in resistance to abiotic stresses in planta. However, the particular functions of AZI1 orthologs in cereal species under biotic and abiotic stresses yet not been comprehensively defined. In this study, we isolate a novel wheat ortholog of the AZI1 gene, TaAZI1, from ACI gom-1 a popular wheat variety and functionally characterize. Sequence analysis indicated that TaAZI1 contains a hydrophobic protein from soybean (HPS)-like subfamily and has 61% identity with AZI1 proteins from Arabidopsis. Transcription of TaAZI1 was detected mostly in wheat stems and leaves.

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