Phenolic compounds and their antioxidant activity in plants growing under heavy metal stress
Phenolic compounds and their antioxidant activity in plants growing under heavy metal stress
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发表时间：
2006
影响因子：
1.8
通讯作者：
A. Michalak
中科院分区：
文献类型：
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作者：
A. Michalak
作为工业发展的结果，环境日益受到重金属的污染。植物具有稳态机制，使它们能够在细胞室中保持必需金属离子的正确浓度，并最大限度地减少过量非必需金属离子的破坏作用。它们对植物的不利影响之一是产生有害的活性氧，导致氧化应激。除了由低分子抗氧化剂和特异性酶组成的研究充分的抗氧化剂系统之外，最近的工作已经开始强调类黄酮、苯丙素和酚酸作为有效抗氧化剂的潜在作用。� 在重金属胁迫过程中，酚类化合物可作为金属螯合剂，另一方面酚类化合物可直接清除分子中的活性氧。�� 酚类化合物，特别是黄酮类和苯丙素类化合物，可被过氧化物酶氧化，并参与过氧化氢清除，酚类/asc/poX体系。它们的抗氧化作用主要在于它们的化学结构，
as a consequence of industrial development, the environment is increasingly polluted with heavy met - als.�Plantspossesshomeostaticmechanismsthatallowthemtokeepcorrectconcentrationsofessential� metalionsincellularcompartmentsandtominimizethedamagingeffectsofanexcessofnonessential� ones. one of their adverse effects on plants is the generation of harmful active oxygen species, leading to oxidativestress.�Besidesthewell-studiedantioxidantsystemsconsistingoflow-molecularantioxidantsand� specific enzymes, recent works have begun to highlight the potential role of flavonoids, phenylopropanoids andphenolicacidsaseffectiveantioxidants.� Duringheavymetalstressphenoliccompoundscanactas� metalchelatorsandontheotherhandphenolicscandirectlyscavengemolecularspeciesofactiveoxygen.�� phenolics, especially flavonoids and phenylopropanoids, are oxidized by peroxidase, and act in h 2 O 2 - scavenging, phenolic/asc/poX system. their antioxidant action resides mainly in their chemical struc -