Oligogalactolipid production during cold challenge is conserved in early diverging lineages
Oligogalactolipid production during cold challenge is conserved in early diverging lineages
复制标题
寒冷挑战期间低聚半乳糖脂的产生在早期分化的谱系中得到保留
DOI：
10.1093/jxb/erad241
复制
发表时间：
2023
影响因子：
6.9
通讯作者：
Nakamura, ed., Yuki
中科院分区：
文献类型：
--
作者：
Barnes, Allison C.;Myers, Jennifer L.;Surber, Samantha M.;Liang, Zhikai;Mower, Jeffrey P.;Schnable, James C.;Roston, Rebecca L.;Nakamura, ed., Yuki
严寒被定义为超出适应温度的破坏性寒冷，具有独特的反应，但这些反应的信号传导和演变尚不清楚。拟南芥（Arabidopsis thaliana）中胞浆酸化引发的低聚半乳糖脂的产生有助于在严寒中生存。在这里，我们研究了从苔藓植物到被子植物等物种的低聚半乳糖脂的产生。每个分支内低聚半乳糖脂的产生有所不同，这表明严寒耐受性的多个进化起源。我们还观察到，对照样品中的低聚半乳糖脂产量高于某些物种的温度挑战样品。对代表性物种的进一步检查揭示了温度、损害和低聚半乳糖脂产生之间的紧密关联，该关联与每个物种的耐冷性成比例。基于寡聚半乳糖脂的产生和转录物的变化，多种被子植物物种共享最初在拟南芥中描述的寡聚半乳糖脂产生的信号，即胞质酸化。总之，这些数据表明，低聚半乳糖脂的产生是一种严重的寒冷反应，源自许多陆地植物谱系中保留的祖先损伤反应，并且胞质酸化可能是其激活的常见信号机制。
Severe cold, defined as a damaging cold beyond acclimation temperatures, has unique responses, but the signaling and evolution of these responses are not well understood. Production of oligogalactolipids, which is triggered by cytosolic acidification in Arabidopsis (Arabidopsis thaliana), contributes to survival in severe cold. Here, we investigated oligogalactolipid production in species from bryophytes to angiosperms. Production of oligogalactolipids differed within each clade, suggesting multiple evolutionary origins of severe cold tolerance. We also observed greater oligogalactolipid production in control samples than in temperature-challenged samples of some species. Further examination of representative species revealed a tight association between temperature, damage, and oligogalactolipid production that scaled with the cold tolerance of each species. Based on oligogalactolipid production and transcript changes, multiple angiosperm species share a signal of oligogalactolipid production initially described in Arabidopsis, namely cytosolic acidification. Together, these data suggest that oligogalactolipid production is a severe cold response that originated from an ancestral damage response that remains in many land plant lineages and that cytosolic acidification may be a common signaling mechanism for its activation.