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植物在生长过程中受到各种生物及非生物胁迫,在长期的适应过程中植物进化出多种抵御这些胁迫的策略,如病程相关蛋白(PRs)的激活等。类萌发素蛋白(GLPs)是PRs家族中的一类胞外糖蛋白,在植物中普遍存在。GLPs主要以酶、受体和结构蛋白的形式参与多种生理生化过程,能清除植物体内过多的活性氧(ROS),GLPs催化反应所产生的H2O2可通过选择性地参与信号级联途径来诱导植物的防卫反应,H2O2还可以通过纤维素交联作用增强细胞壁的结构,在植物抵抗氧化胁迫过程中起重要作用。本文综述了植物GLPs的结构特征及其参与的植物对逆境胁迫的防卫反应。
Plants are subjected to various biological and abiotic stresses during their growth. In the long-term adaptation process, plants develop a variety of strategies to combat these stresses, such as the activation of disease-related proteins (PRs). Germ-like proteins (GLPs) are a group of extracellular glycoproteins in the PRs family that are ubiquitous in plants. GLPs participate in various physiological and biochemical processes mainly in the form of enzymes, receptors and structural proteins, and can remove excess ROS in plants. The GLO2 produced by the catalytic reaction of GLPs can selectively participate in signaling cascades Induction of plant defense responses, H2O2 can also increase the cell wall structure through the crosslinking of cellulose and play an important role in the plant against oxidative stress. This review summarizes the structural characteristics of plant GLPs and the defensive responses of their participating plants to stress.