疫霉菌对嫁接辣椒叶片中POD,SOD,MDA活性变化的影响

Effects of Phytophthora capsici on activities of POD,SOD,MDA in leaves of grafted pepper

为了解乐都长辣椒嫁接后其叶片中POD,SOD,MDA含量变化与抗性的关系,以引自日本的高抗辣椒资源2号为砧木,乐都长辣椒为接穗,通过灌根法进行人工接种疫霉菌,接水植株作为对照,测定接种后嫁接苗叶片中POD,SOD,MDA含量变化。结果表明:在嫁接乐都长辣椒接种疫霉菌后叶片中,POD,SOD,MAD含量都随接种时间延长逐渐增加后又降低,而接水的对照变化趋势较小。嫁接辣椒叶片中POD,SOD,MAD含量是其抗病性增强的重要因素。

In order to understand the relationships between the Phytophthora capsici - resistant of grafted peppers and the enzyme activities of POD, SOD and MDA in grafted seedlings, the intro- duced Japan pepper No. 2 with high resistance were used as rootstocks and Ledu long pepper were used as scion to conduct the trial. Root irrigation was used for Phytophthora inoculation and water was used as check, and the activities of POD, SOD, MDA in grafted leaves were measured. The activities of POD, SOD, MDA firstly increase with the fungus infection and then decrease, but change in check is very small. POD, SOD, MAD contents are important factors in enhanced resistance of grafting pepper.