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一般认为,乙烯促使果实衰老并削弱果实对病原的抗性。但也曾有人报道,乙烯可抑制甘薯黑疤病、苹果炭疽病和柑桔炭疽病。本试验将脐橙和伏令夏橙用青霉病菌接种,并用1000ppm乙烯处理(即持续通入乙烯与空气的混合气体,20℃下)。结果表明,乙烯处理2—6抑制了该菌的生长,表现出病斑直径较小,果皮氨基葡糖含量较低。处理1天的无效,病斑较大,氨基葡糖含量较高,表明该菌生长较快;处理2—4天的相互间无显著差异;处理5—6天的效果最佳。这可能与抗真菌物质的合成有关。
It is generally believed that ethylene promotes the senescence of fruit and weakens the fruit’s resistance to pathogens. However, it has also been reported that ethylene can inhibit sweet potato black scar disease, apple anthracnose and citrus anthracnose. In this experiment, Navel orange and Vladimir were inoculated with Penicillium sp. And treated with 1000 ppm ethylene (ie continuous aeration of ethylene with air at 20 ° C). The results showed that ethylene treatment 2-6 inhibited the growth of the strain, showing a lesser lesion diameter and a lower content of glucosamine pericarp. The treatment for one day was invalid with a larger lesion and a higher content of glucosamine, indicating that the bacteria grew rapidly. There was no significant difference between treatments for 2-4 days and the best effect was obtained after 5-6 days. This may be related to the synthesis of antifungal substances.