PDF(Pubmed)
Abstract：
UNASSIGNED: As leaves grow, they transition from a low-microbe environment embedded in shoot apex to a more complex one exposed to phyllosphere microbiomes. Such change requires a coordinated reprogramming of cellular responses to biotic stresses. It remains unclear how plants shift from fast growth to robust resistance during organ development.
UNASSIGNED: Here, we reported that salicylic acid (SA) accumulation and response were temporarily increased during leaf maturation in herbaceous annual Arabidopsis. Leaf primordia undergoing active cell division were insensitive to the elicitor-induced SA response. This age-dependent increase in SA response was not due to prolonged exposure to environmental microbes. Autoimmune mutants with elevated SA levels did not alter the temporal pattern dependent on ontogenic stage. Young Arabidopsis leaves were more susceptible than mature leaves to Pseudomonas syringae pv. tomato (Pto) DC3000 cor- infection. Finally, we showed a broadly similar pattern in cotton, a woody perennial, where young leaves with reduced SA signaling were preferentially invaded by a Xanthomonas pathogen after leaf surface infection.
UNASSIGNED: Through this work, we provided insights in the SA-mediated ontogenic resistance in Arabidopsis and tomato.
UNASSIGNED: Here, we reported that salicylic acid (SA) accumulation and response were temporarily increased during leaf maturation in herbaceous annual Arabidopsis. Leaf primordia undergoing active cell division were insensitive to the elicitor-induced SA response. This age-dependent increase in SA response was not due to prolonged exposure to environmental microbes. Autoimmune mutants with elevated SA levels did not alter the temporal pattern dependent on ontogenic stage. Young Arabidopsis leaves were more susceptible than mature leaves to Pseudomonas syringae pv. tomato (Pto) DC3000 cor- infection. Finally, we showed a broadly similar pattern in cotton, a woody perennial, where young leaves with reduced SA signaling were preferentially invaded by a Xanthomonas pathogen after leaf surface infection.
UNASSIGNED: Through this work, we provided insights in the SA-mediated ontogenic resistance in Arabidopsis and tomato.
摘要：
■随着叶子的生长，它们从嵌入茎尖的低微生物环境过渡到暴露于叶球微生物组的更复杂的环境。这种变化需要对生物应激的细胞反应进行协调的重编程。目前尚不清楚植物如何在器官发育过程中从快速生长转变为强大的抗性。
■这里，我们报道，在草本的一年生拟南芥中，水杨酸（SA）的积累和响应在叶片成熟期间暂时增加。经历活跃细胞分裂的叶原基对激发子诱导的SA反应不敏感。SA反应的这种年龄依赖性增加不是由于长时间暴露于环境微生物。SA水平升高的自身免疫突变体不会改变取决于个体发育阶段的时间模式。拟南芥幼叶比成熟叶对丁香假单胞菌pv更敏感。番茄（Pto）DC3000感染。最后,我们在棉花上表现出大致相似的图案，多年生木质植物，其中SA信号传导减少的幼叶在叶面感染后优先被黄单胞菌病原体入侵。
■通过这项工作，我们提供了有关拟南芥和番茄中SA介导的本体抗性的见解。
■这里，我们报道，在草本的一年生拟南芥中，水杨酸（SA）的积累和响应在叶片成熟期间暂时增加。经历活跃细胞分裂的叶原基对激发子诱导的SA反应不敏感。SA反应的这种年龄依赖性增加不是由于长时间暴露于环境微生物。SA水平升高的自身免疫突变体不会改变取决于个体发育阶段的时间模式。拟南芥幼叶比成熟叶对丁香假单胞菌pv更敏感。番茄（Pto）DC3000感染。最后,我们在棉花上表现出大致相似的图案，多年生木质植物，其中SA信号传导减少的幼叶在叶面感染后优先被黄单胞菌病原体入侵。
■通过这项工作，我们提供了有关拟南芥和番茄中SA介导的本体抗性的见解。
