论文部分内容阅读
为了研究不同抗性花生品种对疮痂病的抗性差异,在田间试验条件下,采用喷雾法研究抗病品种‘贺油13’、感病品种‘泉花10号’接种疮痂病菌后其叶片生理特性及产量的变化。结果表明:可溶性糖含量在接种后呈先升高后降低的趋势,抗病品种其可溶性糖含量均高于其对照,而感病品种与其对照相比均有所下降,说明花生叶片中可溶性糖含量与植株抗病性有一定的相关性。抗感花生品种接菌后叶片可溶性蛋白质含量均高于其对照,但感病品种比抗病品种的峰值出现的要早,表明感病品种对病菌的侵染较敏感,品种的抗病性与对病菌侵染的反应呈负相关。接菌后抗感品种叶片超氧化物歧化酶(SOD)活性均呈先升高后降低的变化趋势,与其相应的对照相比,抗病品种比感病品种降低的幅度相对较小;花生叶片过氧化氢酶(CAT)和过氧化物酶(POD)活性随生育进程的推进整体呈现先下降后升高再降低的变化趋势,其相应的对照相比,接种后抗病品种的CAT和POD活性表现相对较高,由此说明保护酶在花生对疮痂病的抗性机制中起了重要作用。接种后2个品种叶片丙二醛(MDA)含量有所增加,表明其质膜受到不同程度的伤害。产量结果研究表明,接菌后抗、感品种均有所减产,但感病品种‘泉花10号’减产幅度较大。
In order to study the difference of resistance to scab among different resistant peanut cultivars, the resistant variety ’HEOYO 13’ was studied by spraying method under field test conditions. The susceptible variety ’Quanhua 10’ Characteristics and changes in output. The results showed that the content of soluble sugar increased firstly and then decreased after inoculation. The soluble sugar content of resistant varieties was higher than that of the control, while the susceptible varieties declined compared with the control, which indicated that soluble sugar The content of plant disease resistance has some relevance. The content of soluble protein in the resistant peanut varieties was higher than that in the control, but the susceptible varieties appeared earlier than the peak of the resistant varieties, indicating that the susceptible varieties were more sensitive to the pathogen infection, The response to pathogen infection was negatively correlated. After inoculation, the activities of superoxide dismutase (SOD) in resistant leaves increased first and then decreased, and the resistant varieties had a lower reduction rate than the susceptible ones. The peanut leaves The activities of catalase (CAT) and peroxidase (POD) showed the trend of decreasing firstly, then increasing and then decreasing with the progress of the growth process. Compared with the corresponding control, CAT and POD The results showed that the protective enzymes played an important role in the mechanism of peanut resistance to scab. The contents of malondialdehyde (MDA) in leaves of two cultivars increased after inoculation, indicating that their plasma membranes were damaged to some extent. Yield results of the study showed that after inoculation anti-susceptible varieties have reduced production, but the susceptible variety ’Quanhua 10’ greater rate of decline.