The dodders (Cuscuta spp.) are a genus of shoot parasites. In nature, a dodder often simultaneously parasitizes two or more neighboring hosts. Salt stress is a common abiotic stress for plants. It is unclear whether dodder transmits physiologically relevant salt stress-induced systemic signals among its hosts and whether these systemic signals affect the hosts' tolerance to salt stress. Here, we simultaneously parasitized two or more cucumber plants with dodder. We found that salt treatment of one host highly primed the connected host, which showed strong decreases in the extent of leaf withering and cell death in response to subsequent salt stress. Transcriptomic analysis indicated that 24 h after salt treatment of one cucumber, the transcriptome of the other dodder-connected cucumber largely resembled that of the salt-treated one, indicating that inter-plant systemic signals primed these dodder-connected cucumbers at least partly through transcriptomic reconfiguration. Furthermore, salt treatment of one of the cucumbers induced physiological changes, including altered proline contents, stomatal conductance, and photosynthetic rates, in both of the dodder-connected cucumbers. This study reveals a role of dodder in mediating salt-induced inter-plant signaling among dodder-connected hosts and highlights the physiological function of these mobile signals in plant-plant interactions under salt stress.

中文翻译：

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d杂剂传播的移动信号会增强宿主植物的耐盐性。

do丝虫（Cuscuta spp。）是枝条寄生虫的属。本质上，a窃者通常同时寄生两个或多个相邻主机。盐胁迫是植物常见的非生物胁迫。目前尚不清楚do丝虫是否在其宿主之间传递生理相关的盐胁迫诱导的系统性信号，以及这些系统性信号是否影响宿主对盐胁迫的耐受性。在这里，我们同时用do丝器寄生了两个或多个黄瓜植株。我们发现，对一个寄主进行盐处理可以使已连接的寄主高度启动，这对随后的盐胁迫显示出叶片枯萎程度和细胞死亡的强烈降低。转录组分析表明，对一个黄瓜进行盐处理后24小时，与另一个连接有掺杂剂的黄瓜的转录组在很大程度上相似于对盐处理的黄瓜。表明植物间的系统信号至少部分地通过转录组重组来引发这些与do杂者连接的黄瓜。此外，对其中一种黄瓜进行盐处理后，会导致生理变化，包括脯氨酸含量，气孔导度和光合速率的变化，这两种黄瓜均与do子相连。这项研究揭示了of丝在介导do丝连接的宿主之间的盐诱导的植物间信号传导中的作用，并强调了这些移动信号在盐胁迫下植物与植物相互作用中的生理功能。和与do丝有关的黄瓜中的光合速率。这项研究揭示了of丝在介导do丝连接的宿主之间的盐诱导的植物间信号传导中的作用，并强调了这些移动信号在盐胁迫下植物与植物相互作用中的生理功能。和与do丝有关的黄瓜中的光合速率。这项研究揭示了of丝在介导do丝连接的宿主之间的盐诱导的植物间信号传导中的作用，并强调了这些移动信号在盐胁迫下植物与植物相互作用中的生理功能。