Priming negatively affects feeding behaviour and aphid biomass of Rhopalosiphum padi on barley
Priming negatively affects feeding behaviour and aphid biomass of Rhopalosiphum padi on barley
复制标题
引发对大麦上的 Rhopalosiphum padi 的取食行为和蚜虫生物量产生负面影响
作者：
Gwendolin Wehner;A. Schikora;F. Ordon;T. Will
植物已经发展出许多应对非生物和生物胁迫的策略。特别是，植物周围的微生物群可能对植物应激反应产生积极影响。一是对根际细菌的反应，这可能导致诱导的系统耐药性。产生 N-酰基高丝氨酸内酯 (AHL) 的革兰氏阴性土壤细菌（例如 Ensifer meliloti）会在植物中诱导启动状态，这是诱导抗性现象的一部分。使用电穿透图技术观察稻小丝虫对引发敏感大麦基因型的摄食行为，并用产生 AHL 的苜蓿苜蓿菌株 expR + ch 处理，结果显示食物摄入量减少。蚜虫似乎在八小时的观察期内克服了这种影响，这可能解释了繁殖差异不存在的原因。在经底漆处理和对照处理的植物上观察繁殖14天。蚜虫侵染后 40 天的长期观察显示，与对照组相比，蚜虫生物量较低，解释为种群增长延迟，而大麦植物的生物量增加。观察到对蚜虫的防御反应与引发相关的基因型效应，当植物对引发的敏感性较低时，对植物基因型没有有益的影响。此前，AHL 引发敏感大麦基因型在用苜蓿的 expR + ch 菌株引发时表现出增强的抗真菌性。本研究报告了对 R. padi 的相同效果。这些发现表明，对 AHL 引发的敏感性可能代表了一种植物育种的新方法，通过诱导植物抗性同时针对多种害虫。
Plants have developed numerous strategies for responding to abiotic and biotic stresses. In particular, the microbiota surrounding plants may have a positive effect on plant stress responses. One is the reaction to rhizobacteria, which can lead to induced systemic resistance. Gram-negative soil bacteria that produce N-acyl homoserine lactones (AHL), for example, Ensifer meliloti, induce a primed state in plants that is part of the inducible resistance phenomenon. Observing Rhopalosiphum padi feeding behaviour on a priming sensitive barley genotype, treated with the AHL-producing E. meliloti strain expR + ch, using electrical penetration graph technique showed decreased ingestion of food. Aphids appear to overcome this effect within the eight-hour observation period, possibly explaining the absence of differences of reproduction. Reproduction was observed for a period of 14 days on primed and control-treated plants. Long-term observations over a period of 40 days after aphid infestation showed a lower aphid biomass in contrast to a control group, interpreted as delayed population growth, and an increase in the biomass of barley plants. Priming-related genotypic effects of the defence response to aphids were observed, with no beneficial effects on the plant genotype when its sensitivity to priming was low. Previously, an AHL-priming sensitive barley genotype showed enhanced resistance against fungi when primed with the expR + ch strain of E. meliloti. The present study reports the same effect against R. padi. These findings suggest that sensitivity to AHL-priming may represent a new approach for plant breeding, targeting multiple pests in parallel by induced plant resistance.
登录
查看更多内容
影响因子：
4.4
作者：
Wehner G;Kopahnke D;Richter K;Kecke S;Schikora A;Ordon F
通讯作者：
Ordon F
DOI：
10.1073/pnas.97.16.8789
发表时间：
2000-08-01
影响因子：
11.1
作者：
Parsek, MR;Greenberg, EP
通讯作者：
Greenberg, EP
大麦的遗传差异控制着 N-酰基高丝氨酸内酯的反应
影响因子：
4.4
作者：
Shrestha A;Elhady A;Adss S;Wehner G;Böttcher Ch;Heuer H;Ordon F;Schikora A
通讯作者：
Schikora A
影响因子：
5.1
作者：
Schikora, Adam;Schenk, Sebastian T.;Hartmann, Anton
通讯作者：
Hartmann, Anton