采前水杨酸处理对‘红芒6号’芒果采后抗病性的影响

摘要

The effects of pre-harvest salicylic acid (SA) treatments with different concentrations (1,10,100 mg/L),stages (1,2,3 months before harvest) and times (once,twice and 3 times) on disease resistance of harvested mango (Mangifera indica L.cv.Zill) fruits were investigated during storage at ambient temperature (22 ～25 ℃).The results showed that all of pre-harvest SA treatments could reduce the lesion diameter in mango fruits inoculated with Colletotrichum gloeosporioides and the disease index of non-inoculated mango fruits,and could enhance the disease resistance in harvested mango fruits during storage.Moreover,the pre-harvest SA treatments with 10 mg/L and 100 mg/L were more effective in controlling the postharvest diseases of mango fruits than the treatment with 1 mg/L.In addition,the pre-harvest SA (20 mg/L) treatments at different stages or different times all had good effects on controlling the postharvest diseases,and the differences among them were not significant.%以‘红芒6号’芒果为材料,研究采前水杨酸不同浓度(1、10、100 mg/L)、不同时期(采前1、2、3个月)及不同次数(1、2、3次)处理对采后芒果在常温(22 ～ 25℃)贮藏条件下抗病效果的影响.结果表明,水杨酸采前不同浓度、不同时间或不同次数处理均能有效降低采后接种炭疽菌芒果的病斑直径和未接菌芒果在贮藏期间自然发病的病情指数,提高采后芒果果实的抗病性.在控制采后病害方面,采前10 mg/L和100mg/L水杨酸处理效果好于1 mg/L水杨酸处理;此外,水杨酸(20 mg/L)采前1、2、3个月处理或采前处理1、2、3次均达到良好的抗病保鲜效果,并且处理之间差异不显著.