期刊
NEW PHYTOLOGIST
卷 232, 期 5, 页码 2138-2151出版社
WILEY
DOI: 10.1111/nph.17415
关键词
aquatic plants; cable bacteria; plant– microbe interaction; rhizosphere; rice; roots; seagrass; sulfide
资金
- Danish National Research Foundation [DNRF136]
- Three Minute Thesis Competition, travel grant (2019), Aarhus University
- ARC Linkage Grant [LP160101011]
- Integrated Coastal Analyses and Sensor Technology (ICoAST) project
- University of Western Australia (UWA), USA
- Australian Institute of Marine Science (AIMS), USA
- Commonwealth Scientific and Industrial Research Organisation (CSIRO), USA
- Department of Primary Industries and Regional Development (DPIRD) WA, USA
- Australian Research Council [LP160101011] Funding Source: Australian Research Council
Research has shown that cable bacteria are widely associated with the roots of various aquatic plants, and this plant-microbe relationship is globally widespread. This relationship is of general importance for vegetation vitality, primary productivity, coastal restoration practices, and greenhouse gas balance in rice fields and wetlands.
Cable bacteria are sulfide-oxidising, filamentous bacteria that reduce toxic sulfide levels, suppress methane emissions and drive nutrient and carbon cycling in sediments. Recently, cable bacteria have been found associated with roots of aquatic plants and rice (Oryza sativa). However, the extent to which cable bacteria are associated with aquatic plants in nature remains unexplored. Using newly generated and public 16S rRNA gene sequence datasets combined with fluorescence in situ hybridisation, we investigated the distribution of cable bacteria around the roots of aquatic plants, encompassing seagrass (including seagrass seedlings), rice, freshwater and saltmarsh plants. Diverse cable bacteria were found associated with roots of 16 out of 28 plant species and at 36 out of 55 investigated sites, across four continents. Plant-associated cable bacteria were confirmed across a variety of ecosystems, including marine coastal environments, estuaries, freshwater streams, isolated pristine lakes and intensive agricultural systems. This pattern indicates that this plant-microbe relationship is globally widespread and neither obligate nor species specific. The occurrence of cable bacteria in plant rhizospheres may be of general importance to vegetation vitality, primary productivity, coastal restoration practices and greenhouse gas balance of rice fields and wetlands.
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