2026-04-17T15:02:23Zhttps://recercat.cat/oai/request

oai:recercat.cat:20.500.12327/20682025-10-22T11:00:45Zcom_2072_4428com_2072_4427col_2072_487898

00925njm 22002777a 4500 dc Cantabella, Daniel author Karpinska, Barbara author Teixidó, Neus author Dolcet-Sanjuan, Ramon author Foyer, Christine author 2022-08-24 Soil bacteria promote plant growth and protect against environmental stresses, but the mechanisms involved remain poorly characterized, particularly when there is no direct contact between the roots and bacteria. Here, we explored the effects of Pseudomonas oryzihabitans PGP01 on the root system architecture (RSA) in Arabidopsis thaliana seedlings. Significant increases in lateral root (LR) density were observed when seedlings were grown in the presence of P. oryzihabitans, as well as an increased abundance of transcripts associated with altered nutrient transport and phytohormone responses. However, no bacterial transcripts were detected on the root samples by RNAseq analysis, demonstrating that the bacteria do not colonize the roots. Separating the agar containing bacteria from the seedlings prevented the bacteria-induced changes in RSA. Bacteria-induced changes in RSA were absent from mutants defective in ethylene response factor (ERF109), glutathione synthesis (pad2-1, cad2-1, and rax1-1) and in strigolactone synthesis (max3-9 and max4-1) or signalling (max2-3). However, the P. oryzihabitans-induced changes in RSA were similar in the low ascorbate mutants (vtc2-1and vtc2-2) to the wild-type controls. Taken together, these results demonstrate the importance of non-volatile signals and redox mechanisms in the root architecture regulation that occurs following long-distance perception of P. oryzihabitans. Cantabella, Daniel, Barbara Karpinska, Neus Teixidó, Ramon Dolcet-Sanjuan, and Christine H Foyer. 2022. "Non-Volatile Signals And Redox Mechanisms Are Required For The Responses Of Arabidopsis Roots To Pseudomonas Oryzihabitans". Journal Of Experimental Botany 73 (19): 6971-6982. doi:10.1093/jxb/erac346 0022-0957 http://hdl.handle.net/20.500.12327/2068 https://doi.org/10.1093/jxb/erac346 Non-volatile signals and redox mechanisms are required for the responses of Arabidopsis roots to Pseudomonas oryzihabitans