TY - JOUR A1 - Hu, Bin A1 - Mithöfer, Axel A1 - Reichelt, Michael A1 - Eggert, Kai A1 - Peters, Franziska S. A1 - Ma, Ming A1 - Schumacher, Jörg A1 - Kreuzwieser, Jürgen A1 - von Wirén, Nicolaus A1 - Rennenberg, Heinz T1 - Systemic reprogramming of phytohormone profiles and metabolic traits by virulent Diplodia infection in its pine (Pinus sylvestris L.) host JF - Plant, Cell & Environment N2 - The widespread ascomycetous fungus Diplodia pinea is a latent, necrotrophic pathogen in Pinus species causing severe damages and world-wide economic losses. However, the interactions between pine hosts and virulent D. pinea are largely not understood. In the present study, systemic defence responses were investigated in non-inoculated, asymptomatic needles and roots of D. pinea infected saplings of two P. sylvestris provenances under controlled greenhouse conditions. Here, we show that D. pinea infection induced a multitude of systemic responses of the phytohormone profiles and metabolic traits. Shared systemic responses of both pine provenances in needles and roots included increased abscisic acid and jasmonic acid levels. Exclusively in the roots of both provenances, enhanced salicylic acid and reduced indole-3-acetic acid levels, structural biomass, and elevated activities of anti-oxidative enzymes were observed. Despite these similarities, the two pine provenances investigated different significantly in the systemic responses of both, phytohormone profiles and metabolic traits in needles and roots. However, the different systemic responses did not prevent subsequent destruction of non-inoculated needles, but rather prevented damage to the roots. Our results provide a detailed view on systemic defence mechanisms of pine hosts that are of particular significance for the selection of provenances with improved defence capacity. KW - anti-oxidative metabolism KW - Diplodia pinea inoculation KW - phytohormone profile KW - ROS accumulation KW - systemic-induced responses Y1 - 2021 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:eb1-opus-6571 SN - 0140-7791 VL - 44 IS - 8 SP - 2744 EP - 2764 PB - Wiley ER -