Hiraga S, Sasaki K, Ito H, Ohashi Y, Matsui H
Department of Applied Bioscience, Graduate School of Agriculture, Hokkaido University, Sapporo, 060-8589 Japan.
Plant Cell Physiol. 2001 May;42(5):462-8. doi: 10.1093/pcp/pce061.
Class III plant peroxidase (POX), a plant-specific oxidoreductase, is one of the many types of peroxidases that are widely distributed in animals, plants and microorganisms. POXs exist as isoenzymes in individual plant species, and each isoenzyme has variable amino acid sequences and shows diverse expression profiles, suggesting their involvement in various physiological processes. Indeed, studies have provided evidence that POXs participate in lignification, suberization, auxin catabolism, wound healing and defense against pathogen infection. Little, however, is known about the signal transduction for inducing expression of the pox genes. Recent studies have provided information on the regulatory mechanisms of wound- and pathogen-induced expression of some pox genes. These studies suggest that pox genes are induced via different signal transduction pathways from those of other known defense-related genes.
Ⅲ类植物过氧化物酶（POX）是一种植物特有的氧化还原酶，是在动物、植物和微生物中广泛分布的多种过氧化物酶之一。POXs以同工酶的形式存在于单个植物物种中，每种同工酶都有可变的氨基酸序列，并表现出不同的表达谱，这表明它们参与了各种生理过程。事实上，研究已经提供了证据表明POXs参与木质化、栓质化、生长素分解代谢、伤口愈合以及对病原体感染的防御。然而，关于诱导pox基因表达的信号转导却知之甚少。最近的研究提供了一些pox基因伤口诱导和病原体诱导表达的调控机制的信息。这些研究表明，pox基因是通过与其他已知防御相关基因不同的信号转导途径被诱导的。
