Crop and Soil Systems Research Group, Scotland's Rural College Edinburgh, UK.
Engineering, Science and Technology Department, Scotland's Rural College Edinburgh, UK.
Front Plant Sci. 2014 May 28;5:241. doi: 10.3389/fpls.2014.00241. eCollection 2014.
The ability of the resistance elicitors acibenzolar-S-methyl (ASM), β-aminobutyric acid (BABA), cis-jasmone (CJ), and a combination of the three products, to control infection of spring barley by Rhynchosporium commune was examined under glasshouse conditions. Significant control of R. commune was provided by ASM and CJ, but the largest reduction in infection was obtained with the combination of the three elicitors. This elicitor combination was found to up-regulate the expression of PR-1b, which is used as a molecular marker for systemic acquired resistance (SAR). However, the elicitor combination also down-regulated the expression of LOX2, a gene involved in the biosynthesis of jasmonic acid (JA). In field experiments over 3 consecutive years, the effects of the elicitor combination were influenced greatly by crop variety and by year. For example, the elicitor combination applied on its own provided significant control of powdery mildew (Blumeria graminis f.sp. hordei) and R. commune in 2009, whereas no control on either variety was observed in 2007. In contrast, treatments involving both the elicitor combination and fungicides provided disease control and yield increases which were equal to, and in some cases better than that provided by the best fungicide-only treatment. The prospects for the use of elicitor plus fungicide treatments to control foliar pathogens of spring barley in practice are discussed.
在温室条件下，研究了抗性诱导剂 acibenzolar-S-甲基（ASM）、β-氨基丁酸（BABA）、顺茉莉酮（CJ）以及这三种产品的组合对春大麦纹枯病菌（Rhynchosporium commune）感染的控制能力。ASM 和 CJ 显著控制了 R. commune 的感染，但三种诱导剂的组合可获得最大的感染减少。该诱导剂组合被发现上调了 PR-1b 的表达，PR-1b 被用作系统性获得抗性（SAR）的分子标记。然而，该诱导剂组合也下调了参与茉莉酸（JA）生物合成的 LOX2 基因的表达。在连续三年的田间试验中，诱导剂组合的效果受到作物品种和年份的极大影响。例如，在 2009 年，单独使用诱导剂组合可显著控制大麦白粉病（Blumeria graminis f.sp. hordei）和 R. commune，但在 2007 年，两种品种均未观察到控制效果。相比之下，涉及诱导剂组合和杀菌剂的处理提供了与最佳杀菌剂单独处理相同的，并且在某些情况下更好的病害控制和产量增加。讨论了在实践中使用诱导剂加杀菌剂处理来控制春大麦叶片病原体的前景。
