N-decanoyl-homoserine lactone alleviates elevated CO2-induced defense suppression to Botrytis cinerea in tomato
N-decanoyl-homoserine lactone alleviates elevated CO2-induced defense suppression to Botrytis cinerea in tomato
复制标题
N-癸酰高丝氨酸内酯减轻 CO2 诱导的番茄灰葡萄孢防御抑制升高
DOI：
10.1016/j.scienta.2020.109353
复制
发表时间：
2020-06-27
影响因子：
4.3
通讯作者：
Shi, Kai
中科院分区：
文献类型：
--
作者：
Hu, ZhangJian;Sun, Zenghui;Shi, Kai
对流层二氧化碳浓度显着增加，特别是自工业革命以来。 CO2施肥技术因其有利于作物品质和产量而越来越多地应用于温室农业种植中。但是，由于二氧化碳浓度升高，自然或农业生态系统中的植物与病原体的相互作用很可能受到影响。到目前为止，二氧化碳浓度升高对植物防御病原体的影响很复杂，其潜在机制仍知之甚少。在这里，我们利用番茄植物发现，升高的二氧化碳显着抑制了植物对坏死性病原体灰葡萄孢的防御，同时伴随着与防御相关的水杨酸和茉莉酸（JA）信号之间的稳态紊乱。但是，在 CO2 升高的条件下，外源应用细菌分泌物 N-癸酰基高丝氨酸内酯 (DHL) 可以显着缓解灰霉病的易感性。此外，JA生物合成突变体spr2和JA信号基因沉默的植物在CO2浓度升高的条件下阻断了DHL诱导的植物防御，这表明JA信号传导对于在CO2浓度升高的条件下减轻DHL对植物对灰霉病敏感性的影响是不可或缺的。总体而言，这些信息将有利于将 DHL 作为在不断变化的二氧化碳条件下农业种植中有吸引力的疾病管理策略。
Tropospheric CO2 concentrations were remarkably increasing, especially since the Industrial Revolution. The CO2 fertilization technology was increasingly used in greenhouse agriculture cultivation because of its benefit to crop quality and yield. But, as a consequence of elevated CO2, the plant-pathogen interactions in natural or agricultural ecosystems have large potential to be affected. So far, the effects of elevated CO2 on plant defense against pathogen are complicated and the underlying mechanism remained poorly understood. Here, using tomato plants, we found that elevated CO2 significantly suppressed the plant defense against necrotrophic pathogen Botrytis cinerea, which is accompanied by the disturbed homeostasis between defense-related salicylic acid- and jasmonic acid- (JA-) signaling. But, exogenous application of bacterial secreta N-decanoyl-homoserine lactone (DHL) drastically rescued B. cinerea disease susceptibility under elevated CO2 condition. Moreover, JA biosynthesis mutant spr2 and JA signaling gene-silenced plants blocked DHL-induced plant defense under elevated CO2 condition, which suggested JA signaling was indispensable to the alleviated effect of DHL on plant susceptibility to B. cinerea under elevated CO2 condition. Overall, this information will be benefit to manipulate DHL as an attractive disease management strategy in agriculture cultivation under changing CO2 conditions.