自由基清除剂的保护作用与甘蔗的抗旱性  

Protective Effect of Free Radical Scavengers and Drought Resistance in Sugarcane

作　　者：陈少裕[1] 陈如凯[2] 周可涌[2] 陈启锋[3] 

机构地区：[1]福建省农业科学院生物技术研究中心,福建福州350003 [2]福建农学院甘蔗综合研究所,福建福州350002 [3]福建农学院作物遗传育种研究所,福建福州350002

出　　处：《作物学报》1994年第2期149-155,共7页Acta Agronomica Sinica

摘　　要：用半胱氨酸、二苯胺、巯基乙醇、苯甲酸钠和α-生育酚等五种化合物作为外源自由基清除剂,研究自由基清除剂的保护作用与甘蔗抗旱性的关系。结果表明,外源自由基清除剂预处理降低了水分胁迫下甘蔗叶片细胞的膜脂过氧化程度和膜透性增加的程度,并延缓了甘蔗叶片叶绿素和可溶性蛋白含量的下降。这些结果说明外源自由基清除剂在减轻或抵御自由基伤害、提高甘蔗的抗旱能力上具有相当明显的保护效果。研究还表明,不同清除剂的保护效果存在差异;清除剂对抗旱性弱的品种的保护效果明显地高于抗旱性强的品种。Five kinds of free radical-scavengers, namely cysteine, diphenylamine, mercaptoethanol, sodium benzoate and α-tocopherol, were used to study the relationship between the pro-tective effect of free radical scavengers and the drought resistance of sugarcane. Exper-imental results showed that the pretreatment with free radical scavengers decreased the level of membrane lipid peroxidation of cell and the permeability of plasma membrane and retarded the decreases of chlorophyll and soluble protein contents of leaf cell in sugar-cane under water stress. The protective effect of free radical scavengers was significantly greater on drough-sensitive variety than on drought-resistant variety.

关 键 词：甘蔗 自由基清除剂 抗旱性 

分 类 号：S566.106.2[农业科学—作物学]