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投稿时间:2017-02-14
投稿时间:2017-02-14
中文摘要: 以鸭梨果实为试验材料,研究了 β-氨基丁酸(β-aminobutyric acid,BABA)对采后常温贮藏条件(20±1 ℃)下鸭 梨果实青霉病的抑制效果及相关酶活性。 鸭梨果实经过 20 mmol/L 的 BABA 处理后接种 Penicillium expansum 孢子,然 后在(20±1)℃的条件下贮藏 6 d,结果发现 BABA 处理显著抑制了青霉病的发生和病斑直径的扩展,提高了鸭梨果实中 几丁质酶(chitinase,CHI) 和 β-1,3-葡聚糖酶(β-1,3-glucanase,GLU) 的活性, 诱导了鸭梨果实中超氧化物歧化酶(superoxide dismutase,SOD)、 过氧化氢酶 (catalase, CAT)、 多酚氧化酶 (polyphenoloxidase, PPO) 和过氧化物酶 (peroxidase, POD) 等抗病相关酶活性的提高, 降低了多聚半乳糖醛酸酶 (polygalacturonase,PG) 和果胶甲酯酶 (pectinmethylesterase,PME)的活性,减少了鸭梨果实中超氧阴离子和过氧化氢的含量。结果表明,BABA 通过诱导提高抗病性、减少水果组织中的活性氧和延缓果实软化,减轻鸭梨果实采后青霉病的发生。
Abstract:The effects of β-aminobutyric acid(BABA) on blue mold decay caused by Penicillium expansum in harvested pear fruit stored at (20±1) ℃ and the possible mechanisms were investigated. The pear fruits were pretreated with 20 mmol/L BABA, followed by inoculating with the spores of Penicillium expansum, and then stored at (20±1) ℃ for 6 d, the results showed that fruit treated with BABA had significantly lower disease in- cidence and smaller lesion diameter than the control fruit did. BABA treatment significantly enhanced activities of chitinase(CHI), β-1, 3-glucanase(GLU), superoxide dismutase(SOD), catalase(CAT), peroxidase (POD), and polyphenoloxidase(PPO). BABA treatment significantly suppressed the activities of polygalactur- onase (PG)and pectinmethylesterase (PME). BABA treatment reduced the content of superoxide radical and H2O2. The experimental results suggested that BABA could effectively suppress blue mold decay in pear fruit may be related to the induced disease resistance in the fruit, decreased the content of reactive oxygen spices in pear fruit tissue and delayed fruit softening.
文章编号:201712037 中图分类号: 文献标志码:A
基金项目:国家自然科学基金青年科学基金(31601521)
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