过氧化物酶（Prx）是几乎在所有王国中发现的硫醇依赖性过氧化物酶家族。在植物中，已知五种主要的Prx。已知它们可催化过氧化物的分解，并且由于它们缺乏辅基，因此催化循环会导致生成非活性形式的Prx。为了重新获得活性形式，Prx依赖于外部电子供体，例如硫氧还蛋白，戊二醛，亲环蛋白，NADPH依赖性硫氧还蛋白还原酶C（NTRC）等。据报道，Prx在抗氧化防御中的作用已得到公认。在生长发育，休眠种子的耐干旱性，保护光合作用，防御病原体和氧化还原信号方面发挥重要作用。众所周知，Prx可为H的排毒建立替代的水-水循环2 O 2，与抗坏血酸依赖性H 2 O 2排毒平行。但是由于实验的局限性，目前还不清楚与抗坏血酸过氧化物酶相比，Prx对H 2 O 2解毒的相对作用。有鉴于此，本综述着眼于Prxs的最新发展。

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Peroxiredoxins (Prx) are a family of thiol dependent peroxidases found in almost all kingdoms. In plants, five major classes of Prx are known. They are known to catalyze the decomposition of peroxides and as they lack a prosthetic group, the catalytic cycle results in the generation of an inactive form of Prx. In order to regain the active form, Prx rely on external electron donors such as thioredoxins, glutaredoxins, cyclophilins, NADPH-dependent thioredoxin reductase C (NTRC) etc. In addition to their well established role in antioxidative defense, Prx are also reported to play an important role in growth and development, dessication tolerance in dormant seeds, protection of photosynthesis, defense against pathogens and redox signaling. Prx are also known to establish an alternate water–water cycle for the detoxification of H2O2, parallel to ascorbate-dependent H2O2 detoxification. But the relative contribution of Prx in detoxifying H2O2 compared to ascorbate peroxidase is not known so far due to experimental limitations. In view of the above, the present review focuses on the recent developments on Prxs.