采后β-氨基丁酸处理对梨果实黑斑病的抑制

Effect of the postharvest β-aminobutyric acid treatment on the inhibiton of fruit alternaria rot of pear fruit

摘要: 本文研究了采后β-氨基丁酸（BABA）处理对苹果梨损伤接种互隔交链孢（Alternaria alternata）果实病斑扩展以及苯丙烷代谢的影响。结果表明,50μg/m L的BABA可有效抑制损伤接种果实病斑直径的扩展;用BABA浸泡果实10min,以及处理和损伤接种间隔12h的处理效果最佳。果实经BABA处理后,体内的苯丙氨酸解氨酶（PAL）活性明显提高,总酚和类黄酮含量也显著增加。由此表明,BABA可通过诱导果实体内的苯丙烷代谢来增强对黑斑病的抗性。

Abstract: Effect of β-aminobutyric acid( BABA) dipping on lesion development of pear fruit inoculated with Alternaria alternata and potentiation of phenylpropanoid pathway was investigated in this paper. The results indicated that the lesion diameter of pear inoculated with A.alternata was significantly decreased when BABA at50μg/m L,and the smallest lesion diameter was determined in the fruit treated for 10 min. In addition,the interval of treatment and inoculation also affected lesion development,and with inoculation the fruit 12 h after treatment showed the best result.Further studies showed that BABA increased phenylalanine ammonia lyase( PAL) activity,accumulated the total content of phenolic and flavonoids in the fruit during storage. It was suggested that BABA treatment inhibited Alternaria rot of pear by enhancing phenylpropanoid pathway in fruits.