RRC ID 81636
Author Riley J. Hodgson, Craig Liddicoat, Christian Cando-Dumancela, Nicole W. Fickling, Shawn D. Peddle, Sunita Ramesh, Martin F. Breed
Title Increasing aridity strengthens the core bacterial rhizosphere associations in the pan-palaeotropical C4 grass, Themeda triandra
Journal Applied Soil Ecology
Abstract Understanding belowground plant-microbial interactions is fundamental to predicting how plant species respond to climate change, particularly in global drylands. However, these interactions are poorly understood, especially for keystone grass species like the pan-palaeotropical Themeda triandra. Here, we used 16S rRNA amplicon sequencing to characterise microbiota in rhizospheres and bulk soils associated with T. triandra. We applied this method to eight native sites across a 3-fold aridity gradient (aridity index range = 0.318 to 0.903 = 87 % global aridity distribution) in southern Australia. By examining the relative contributions of climatic, edaphic, ecological, and host specific phenotypic traits, we identified the ecological drivers of core T. triandra-associated microbiota. We show that aridity had the strongest effect on shaping these core microbiotas, and report that a greater proportion of bacterial taxa that were from the core rhizosphere microbiomes were also differentially abundant in more arid T. triandra regions. These results suggest that T. triandra naturally growing in soils under more arid conditions have greater reliance on rhizosphere core taxa than plants growing under wetter conditions. Our study underscores the likely importance of targeted recruitment of bacteria into the rhizosphere by grassland keystone species, such as T. triandra, when growing in arid conditions. This bacterial soil recruitment is expected to become even more important under climate change.
Volume 201
Pages 105514
Published 2024-6-30
DOI 10.1016/j.apsoil.2024.105514
Resource
GBIF Plant specimens of Toyota City Nature Sanctuary Plant specimens of Tochigi Prefectural Museum Plant specimens of Nasunogahara Museum Vascular plant specimens of the herbarium of the Tohoku University (TUS) Spermatophyta Specimens of Kawasaki Municipal Science Museum Plant specimens of Otaru Museum Vascular plant specimens of the Kagoshima Prefectural Museum The 6-7th National Survey on the Natural Environment: Vegetation Survey Vascular Plant Specimens of Yamagata Prefectural Museum Nagoya-Plants Vascular plant specimens of Omachi Alpine Museum Vascular plant specimens of Akita Prefectural Museum Vascular plants database of Atsugi City Museum Herbarium, University Archives and Collections, Fukushima University, Japan (FKSE) Angiospermatatophytina Collection of Saitama Museum of Natural History Vascular plant specimens of Iida City Museum Vascular Plant Collection of Natural History Museum and Institute, Chiba Herbarium Specimens of Museum of Nature and Human Activities, Hyogo Pref., Japan Spermatophyta collection of Museum of Natural and Environmental History, Shizuoka Ibaraki Nature Museum, Vascular Plants collection Vascular plant specimens of National Museum of Nature and Science (TNS) Plant Specimens of Kurashiki Museum of Natural History Herbarium Specimens of Tokushima Prefectural Museum, Japan Herbarium of Kitakyushu Museum of Natural History and Human History Vascular Plants Collection of Sagamihara City Museum Plant specimens in the Museum of Nature and Human Activities, Hyogo Prefecture, Japan Plant specimens deposited in Osaka Museum of Natural History, Japan Vascular Plant Specimens of Kochi Prefectural Makino Botanical Garden Plant Specimens of The Shimane Nature Museum of Mt. Sanbe Vascular Plant Specimen database of Kanagawa Prefectural Museum of Natural History Gunma Museum of Natural History, Vascular Plant Specimen Vascular plants collection of Hiratsuka City Museum Vascular Plant Specimens of the URO Herbarium (Faculty of Education, University of the Ryukyus) Plant specimens of Horaiji-san Museum of Natural History Kichi T. collection Vascular Plant Specimens of the RYU Herbarium (Faculty of Science, University of the Ryukyus) Vascular plant specimens of Sugadaira Research Station, Mountain Science Center, University of Tsukuba The 2nd and 3rd National Survey on the Natural Environment: Vegetation Survey (common species) Herbarium of Shinshu University Plant specimens of Parthenon Tama Museum (PTHM) Vascular plant specimens of Nagano Environmental Conservation Research Institute, Nagano Prefecture Botanical Specimens of Kaizuka City Museum of Natural History (KCMN) Vascular plant specimens of The Shirakami Research Center for Environmental Sciences, Hirosaki University Plant specimens of Toyota City Nature Sanctuary (from non-museum circle) Vascular plant specimens of Toyama Science Museum Plant specimens of Takatsuki Nature Museum (Aquapia Akutagawa)