Methyl jasmonate induces resistance against Penicillium citrinum in Chinese bayberry by priming of defense responses
Methyl jasmonate induces resistance against Penicillium citrinum in Chinese bayberry by priming of defense responses
复制标题
茉莉酸甲酯通过启动防御反应诱导杨梅对柑橘青霉菌的抗性
DOI：
10.1016/j.postharvbio.2014.07.009
复制
发表时间：
2014-12-01
影响因子：
7
通讯作者：
Zheng, Yonghua
中科院分区：
文献类型：
--
作者：
Wang, Kaituo;Jin, Peng;Zheng, Yonghua
茉莉酸甲酯（MeJA）是植物抗病防卫反应的激活剂。然而，在水果中的MeJA的采后诱导抗性的机制在很大程度上是未知的。因此，我们研究了采后MeJA处理对杨梅抗桔青霉病的影响及其可能的机制。结果表明，10 μ mol L ~（-1）MeJA处理显著抑制了桔黄青霉引起的绿色腐烂，在1 ℃贮藏8 d后，腐烂率比对照降低66.2%。此外，很明显，MeJA触发引发机制，在中国杨梅，因为只有MeJA处理的水果表现出增强的能力，以增强防御反应后，挑战与病原体。这些增强的反应包括过氧化氢爆发，苯丙氨酸解氨酶和几丁质酶的蛋白质水平提高，酚类化合物，木质素和植保素的积累。因此，我们的研究结果表明，采后MeJA处理诱导的防御反应引发的防御反应对中国杨梅对桔黄青霉病的抗性。(C)2014爱思唯尔有限公司版权所有。
Methyl jasmonate (MeJA) can act as an activator of defense responses in plants against pathogenic infection. However, the mechanisms involved in the postharvest induction of resistance by MeJA in fruit are largely unknown. Thus, we investigated the effect of a postharvest MeJA treatment on disease resistance against Penicillium citrinum infection in Chinese bayberries and the possible mechanisms. The results indicated that treatment with 10 mu mol L-1 of MeJA significantly inhibited green mould rot caused by P. citrinum, with the decay incidence being 66.2% lower than that of the control fruit after storage at 1 degrees C for 8 d. Moreover, it is clear that MeJA triggers a priming mechanism in Chinese bayberries, since only the MeJA-treated fruit showed an enhanced capacity to augment defense responses upon challenge with the pathogen. These augmented responses included an H2O2 burst, enhanced protein levels of phenylalanine ammonia-lyase and chitinase, and accumulation of phenolic compounds, lignin and phytoalexin. Therefore, our results suggest that a postharvest MeJA treatment induces disease resistance against P. citrinum in Chinese bayberries by priming of defense responses. (C) 2014 Elsevier B.V. All rights reserved.