Comparative transcriptomics of multi-stress responses in Pachycladoncheesemanii and Arabidopsis thaliana

Environmental stresses affect both plant growth and provide some tolerance to multiple stresses and it is widely reported that there is overlap and crosstalk between stress responses. The New Zealand native plant species and close relative to Arabidopsis thaliana, Pachycladon cheesemanii grows under environmental conditions that are unsustainable for many plant species. In our study, both A. thaliana and P. cheesemanii were treated with low temperatures, salt, or UV-B radiation, and the stress transcriptomes were then determined. Comparative transcriptome and network analyses were performed to discover similar and unique stress responses within the two species, and between the two plant species. The study aimed to construct common stress-response pathways for A. thaliana and P. cheesemanii and to identify possible novel plant strategies that help mitigate environmental stress. The research contributes to research that aims to improve climate change resilience in agriculture.

环境胁迫既可抑制植物生长，亦可赋予植物多重胁迫耐受性，已有大量研究证实不同胁迫响应之间存在重叠与交叉对话（crosstalk）。*Pachycladon cheesemanii*是新西兰本土植物物种，同时也是拟南芥（*Arabidopsis thaliana*）的近缘物种，可在诸多植物无法存活的环境条件下生长。本研究对拟南芥与*Pachycladon cheesemanii*分别施加低温、盐胁迫及UV-B辐射处理，随后测定二者的胁迫转录组。研究通过比较转录组与调控网络分析，挖掘两个物种内部以及二者之间共有的与特异性胁迫响应特征。本研究旨在构建拟南芥与*Pachycladon cheesemanii*共有的胁迫响应通路，并筛选出可缓解环境胁迫的潜在新型植物策略。本研究可为旨在提升农业气候变化适应韧性的相关研究提供支撑。