几种化学物质诱导彩色马蹄莲对软腐病抗性的研究

本试验测定了纳米硅、草酸、硅酸钠和硫酸亚铁4种化学物质在不同浓度下对彩色马蹄莲软腐病菌的室内抑菌活性和诱导抗病效果。结果表明,硫酸亚铁3种浓度对彩色马蹄莲软腐病菌均表现较强的抑制作用;1 g/L纳米硅、0.15 g/L草酸和0.2 g/L硅酸钠3种化学物质对软腐病菌无明显抑制作用且诱导抗病效果较好,分别达到62.28%、77.56%、88.46%;经3种化学物质诱导处理后再进行接种,诱导处理和接种期间彩色马蹄莲叶片组织内过氧化物酶(POD)、苯丙氨酸解氨酶(PAL)、多酚氧化酶(PPO)酶活性均高于对照,其中硅酸钠处理后彩色马蹄莲叶片组织内POD、PAL活性高于纳米硅和草酸处理,草酸处理后叶片组织内PPO活性高于纳米硅和硅酸钠处理。

Induced resistance of the colored calla lily against Erwinia carotovora subsp. carotovora by four chemicals

The inhibitory bioactivity and the induced resistance by nanometer silicon, salicylic acid , sodium silicate and ferrous sulphate with different concentrations against Erwinia carotovora subsp. carotovora in the colored calla lily were tested. The ferrous sulphate obviously showed inhibitory effects at three concentrations. The inhibitory effects of 1 g/L nanometer silicon, 0.15 g/L SA and 0.2 g/L sodium silicate were lower than those of others, but all of the three chemicals showed significant induced resistance, which were 62.28%, 77.56% and 88.46%, respectively. The results indicated that the activity of POD, PAL and PPO in the treated leaves were always higher than that of the control during the periods of induced resistance and challenge inoculation. Treated by sodium silicate, the activity of POD and PAL was higher than that by salicylic acid and nanometer silicon. Treated by salicylic acid, the activity of PPO were higher than that by salicylic acid and nanometer silicon.