Accumulated Evidence Substantiates a Role for Three Classes of Wheat Xylanase Inhibitors in Plant Defense

摘要: Since their discovery in 1997, work on proteinaceous wheat xylanase inhibitors (XIs) led to the identification and thorough biochemical structural characterization of three classes XIs, namely TAXI-type (Triticum aestivum inhibitor), XIP-type (xylanase inhibiting protein), TLXI-type (thaumatin-like inhibitor) XIs. Already early on, a role plant defense has been put forward for these proteins, mainly based observation that XIs are only active against xylanases microbial origin can not inhibit endogenous known so far. Considerable effort devoted substantiate this hypothesis. Data at genomic, transcriptomic proteomic levels increasingly provide evidence occurring as large polymorphic families, do indeed participate defense. This review summarizes current knowledge accumulated TLXI XIP be classified pathogenesis-rela...