Reduction of latent infection and enhancement of disease resistance in muskmelon by preharvest application of harpin.
Reduction of latent infection and enhancement of disease resistance in muskmelon by preharvest application of harpin.
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DOI：
10.1021/jf203775q
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发表时间：
2011-11
影响因子：
6.1
通讯作者：
Junjie Wang;Y. Bi;Zhengke Zhang;Huaiyu Zhang;Y. Ge
中科院分区：
文献类型：
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作者：
Junjie Wang;Y. Bi;Zhengke Zhang;Huaiyu Zhang;Y. Ge
在甜瓜花期、幼果期、膨果期、结网期4个不同时期，用50 mg/L harpin喷洒甜瓜4次，进行潜伏感染分析。结果表明，喷洒甜瓜的潜伏感染明显低于对照水果。同时，用harpin处理的果实中过氧化物酶、苯丙氨酸解氨酶、β-1,3-葡聚糖酶和几丁质酶的活性显着增加。它还导致总酚化合物、黄酮类化合物和木质素的含量增加。此外，harpin处理增加了超氧化物歧化酶的活性，提高了过氧化氢的含量，降低了过氧化氢酶的活性。此外，harpin处理有助于加固水果果皮细胞壁，减少采后腐烂，提高采后品质。这些结果表明harpin有效参与诱导抗性，并可能成为预防甜瓜潜伏感染的新策略。
Latent infection was analyzed when harpin at 50 mg/L was sprayed on muskmelon 4 times at four different stages: florescence, young fruit, fruit enlarging, and netting periods. Results showed that the latent infection was significantly lower in sprayed muskmelons than in the control fruit. Meanwhile, the activities of peroxidase, phenylalanine ammonia-lyase, β-1,3-glucanase, and chitinase increased significantly in the fruit treated with harpin. It also resulted in an increase of contents of total phenolic compounds, flavanoids, and lignin. In addition, the treatment of harpin increased the activity of superoxide dismutase, enhanced the content of hydrogen peroxide, and reduced catalase activity. Furthermore, harpin treatments contributed to the reinforcement of cell walls of pericarp in fruit, the reduction of postharvest decay, and the improvement of postharvest qualities. These results suggested that harpin effectively participated in inducing resistance and could be a new strategy for preventing latent infection in muskmelon.