Consequences of Sphaeropsis tip blight disease for the phytohormone profile and antioxidative metabolism of its pine host.

Autor: Hu B; College of Forestry, Northwest A&F University, Yangling, CN-712100, China.; Institute of Forest Sciences, Chair of Tree Physiology, Albert-Ludwigs-Universität Freiburg, Freiburg, D-79110, Germany., Sakakibara H; RIKEN Center for Sustainable Resource Science, Yokohama, 230-0045, Japan.; Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, 464-8601, Japan., Kojima M; RIKEN Center for Sustainable Resource Science, Yokohama, 230-0045, Japan., Takebayashi Y; RIKEN Center for Sustainable Resource Science, Yokohama, 230-0045, Japan., Bußkamp J; Department of Forest Protection, Northwest German Forest Research Institute (NW-FVA), Göttingen, D-37079, Germany., Langer GJ; Department of Forest Protection, Northwest German Forest Research Institute (NW-FVA), Göttingen, D-37079, Germany., Peters FS; Institute of Forest Sciences, Chair of Tree Physiology, Albert-Ludwigs-Universität Freiburg, Freiburg, D-79110, Germany.; Department of Forest Protection, FVA Forest Research Institute of Baden-Württemberg (FVA-BW), Freiburg, D-79100, Germany., Schumacher J; Department of Forest Protection, FVA Forest Research Institute of Baden-Württemberg (FVA-BW), Freiburg, D-79100, Germany.; Department of Forest Health and Risk Management, Eberswalde University for Sustainable Development (HNE Eberswalde), Eberswalde, D-16225, Germany., Eiblmeier M; Institute of Forest Sciences, Chair of Tree Physiology, Albert-Ludwigs-Universität Freiburg, Freiburg, D-79110, Germany., Kreuzwieser J; Institute of Forest Sciences, Chair of Tree Physiology, Albert-Ludwigs-Universität Freiburg, Freiburg, D-79110, Germany., Rennenberg H; Institute of Forest Sciences, Chair of Tree Physiology, Albert-Ludwigs-Universität Freiburg, Freiburg, D-79110, Germany.; College of Sciences, King Saud University, Riyadh, 11451, Saudi Arabia.
Jazyk: angličtina
Zdroj: Plant, cell & environment [Plant Cell Environ] 2018 Apr; Vol. 41 (4), pp. 737-754. Date of Electronic Publication: 2018 Feb 23.
DOI: 10.1111/pce.13118
Abstrakt: Phytopathogenic fungi infections induce plant defence responses that mediate changes in metabolic and signalling processes with severe consequences for plant growth and development. Sphaeropsis tip blight, induced by the endophytic fungus Sphaeropsis sapinea that spreads from stem tissues to the needles, is the most widespread disease of conifer forests causing dramatic economic losses. However, metabolic consequences of this disease on bark and wood tissues of its host are largely unexplored. Here, we show that diseased host pines experience tissue dehydration in both bark and wood. Increased cytokinin and declined indole-3-acetic acid levels were observed in both tissues and increased jasmonic acid and abscisic acid levels exclusively in the wood. Increased lignin contents at the expense of holo-cellulose with declined structural biomass of the wood reflect cell wall fortification by S. sapinea infection. These changes are consistent with H 2 O 2 accumulation in the wood, required for lignin polymerization. Accumulation of H 2 O 2 was associated with more oxidized redox states of glutathione and ascorbate pools. These findings indicate that S. sapinea affects both phytohormone signalling and the antioxidative defence system in stem tissues of its pine host during the infection process.
(© 2017 John Wiley & Sons Ltd.)
Databáze: MEDLINE
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