桃蚜Tuberocephalus momonis严重损害桃树Prunus persica f 的叶子并形成虫瘿。rubro-plena、P. persica和P. davidiana. 由这些蚜虫形成的带有虫瘿的叶子将比同一棵树上的健康叶子提前至少两个月脱落。因此,我们假设虫瘿的发育可能受参与正常器官发生的植物激素控制。虫瘿组织与果实的可溶性糖含量呈正相关,表明虫瘿是库藏器官。UPLC-MS/MS 分析结果表明,与健康叶片相比,在形成虫瘿的蚜虫、虫瘿本身和桃果实中积累了更高浓度的 6-苄基氨基嘌呤 (BAP),这表明 BAP 是由昆虫刺激虫瘿的建立。果实中脱落酸 (ABA) 浓度和虫瘿组织中茉莉酸 (JA) 浓度的显着增加表明这些植物正在抵御虫瘿。与健康叶片相比,1-氨基-环丙烷-1-羧酸 (ACC) 的浓度在虫瘿组织中显着增加,并且与果实和虫瘿发育呈正相关。此外,转录组测序分析显示,在虫瘿脱落期间,'ETR-SIMKK-ERE1' 和 'ABA-PYR/PYL/RCAR-PP2C-SnRK2' 中的差异表达基因在虫瘿脱落期间显着富集。我们的研究结果表明,乙烯途径参与了虫瘿的脱落,这种虫瘿脱落使寄主植物至少部分地保护自己免受虫瘿的侵害。与健康叶片相比,1-氨基-环丙烷-1-羧酸 (ACC) 的浓度在虫瘿组织中显着增加,并且与果实和虫瘿发育呈正相关。此外,转录组测序分析显示,在虫瘿脱落期间,'ETR-SIMKK-ERE1' 和 'ABA-PYR/PYL/RCAR-PP2C-SnRK2' 中的差异表达基因在虫瘿脱落期间显着富集。我们的研究结果表明,乙烯途径参与了虫瘿的脱落,这种虫瘿脱落使寄主植物至少部分地保护自己免受虫瘿的侵害。与健康叶片相比,1-氨基-环丙烷-1-羧酸 (ACC) 的浓度在虫瘿组织中显着增加,并且与果实和虫瘿发育呈正相关。此外,转录组测序分析显示,在虫瘿脱落期间,'ETR-SIMKK-ERE1' 和 'ABA-PYR/PYL/RCAR-PP2C-SnRK2' 中的差异表达基因在虫瘿脱落期间显着富集。我们的研究结果表明,乙烯途径参与了虫瘿的脱落,这种虫瘿脱落使寄主植物至少部分地保护自己免受虫瘿的侵害。转录组测序分析显示,在虫瘿脱落期间,'ETR-SIMKK-ERE1' 和 'ABA-PYR/PYL/RCAR-PP2C-SnRK2' 中的差异表达基因在虫瘿脱落期间显着富集。我们的研究结果表明,乙烯途径参与了虫瘿的脱落,这种虫瘿脱落使寄主植物至少部分地保护自己免受虫瘿的侵害。转录组测序分析显示,在虫瘿脱落期间,'ETR-SIMKK-ERE1' 和 'ABA-PYR/PYL/RCAR-PP2C-SnRK2' 中的差异表达基因在虫瘿脱落期间显着富集。我们的研究结果表明,乙烯途径参与了虫瘿的脱落,这种虫瘿脱落使寄主植物至少部分地保护自己免受虫瘿的侵害。
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A new perspective on plant defense against foliar gall-forming aphids through activation of the fruit abscission pathway
The peach aphid Tuberocephalus momonis seriously damages leaves and forms galls in the peach species Prunus persica f. rubro-plena, P. persica, and P. davidiana. Leaves bearing galls formed by these aphids will be abscised at least two months earlier than the healthy leaves on the same tree. Thus, we hypothesize that gall development is likely to be governed by phytohormones involved in normal organogenesis. The soluble sugar content was positively correlated between gall tissues and fruits, suggesting that the galls are sink organs. The results of UPLC-MS/MS analysis showed that higher concentrations of 6-benzylaminopurine (BAP) accumulated in both the gall-forming aphids, the galls themselves and the fruits of peach species than in healthy leaves, suggesting that BAP was being synthesized by the insects to stimulate the establishment of a gall. A significant increase in the concentrations of abscisic acid (ABA) in fruits and jasmonic acid (JA) in gall tissues indicated that these plants are defending from the galls. The concentrations of 1-amino-cyclopropane-1-carboxylic acid (ACC) significantly increased in gall tissues compared with healthy leaves, and were positively correlated with both fruit and gall development. In addition, transcriptome sequencing analysis revealed that during gall abscission, differentially expressed genes in both 'ETR-SIMKK-ERE1' and 'ABA-PYR/PYL/RCAR-PP2C-SnRK2' were significantly enriched during gall abscission. Our results showed that ethylene pathway was involved in the abscission of gall, and this gall abscission allowed the host plants to protect themselves from the gall-forming insects, at least partially.