RRC ID 78007
Author Qin F, Xue T, Zhang X, Yang X, Yu J, Gadagkar SR, Yu S.
Title Past climate cooling and orogenesis of the Hengduan Mountains have influenced the evolution of Impatiens sect. Impatiens (Balsaminaceae) in the Northern Hemisphere.
Journal BMC Plant Biol
Abstract BACKGROUND:Impatiens sect. Impatiens is distributed across the Northern Hemisphere and has diversified considerably, particularly within the Hengduan Mountains (HDM) in southwest China. Yet, the infra-sectional phylogenetic relationships are not well resolved, largely due to limited taxon sampling and an insufficient number of molecular markers. The evolutionary history of its diversification is also poorly understood. In this study, plastome data and the most complete sampling to date were used to reconstruct a robust phylogenetic framework for this section. The phylogeny was then used to investigate its biogeographical history and diversification patterns, specifically with the aim of understanding the role played by the HDM and past climatic changes in its diversification.
RESULTS:A stable phylogeny was reconstructed that strongly supported both the monophyly of the section and its division into seven major clades (Clades I-VII). Molecular dating and ancestral area reconstruction suggest that sect. Impatiens originated in the HDM and Southeast China around 11.76 Ma, after which different lineages dispersed to Northwest China, temperate Eurasia, and North America, mainly during the Pliocene and Pleistocene. An intercontinental dispersal event from East Asia to western North America may have occurred via the Bering Land Bridge or Aleutian Islands. The diversification rate was high during its early history, especially with the HDM, but gradually decreased over time both within and outside the HDM. Multiple linear regression analysis showed that the distribution pattern of species richness was strongly associated with elevation range, elevation, and mean annual temperature. Finally, ancestral niche analysis indicated that sect. Impatiens originated in a relatively cool, middle-elevation area.
CONCLUSIONS:We inferred the evolutionary history of sect. Impatiens based on a solid phylogenetic framework. The HDM was the primary source or pump of its diversity in the Northern Hemisphere. Orogeny and climate change may have also shaped its diversification rates, as a steady decrease in the diversification rate coincided with the uplift of the HDM and climate cooling. These findings provide insights into the distribution pattern of sect. Impatiens and other plants in the Northern Hemisphere.
Volume 23(1)
Pages 600
Published 2023-11-29
DOI 10.1186/s12870-023-04625-w
PII 10.1186/s12870-023-04625-w
PMID 38030965
PMC PMC10685625
MeSH Balsaminaceae* Biological Evolution China Impatiens* Phylogeny Phylogeography
IF 3.497
GBIF Plant specimens of Ishikawa Museum of Natural History Plant Specimens of The Cattle Museum Long-term fauna and flora records of the experimental forests of the Forest Research Station of Hokkaido University, Japan Plant specimens of Toyota City Nature Sanctuary Plant specimens of Tochigi Prefectural Museum Plant specimens of Nasunogahara Museum Herbarium Specimens of The Kagoshima University Museum (KAG) Plant Specimen Database of Tama Forest Science Garden, Forestry and Forest Products Research Institute, Japan Plant specimens of Otaru Museum Plant specimens of Komatsu City Museum Plant specimens of Horaiji-san Museum of Natural History Toji K. collection The 6-7th National Survey on the Natural Environment: Vegetation Survey Vascular Plant Specimens of Yamagata Prefectural Museum 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 Herbarium of Hokkaido University Museum (SAPS) 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 Plant Specimens of Lake Biwa Museum Spermatophyta specimens of Iwate Prefectural Museum 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 Plant specimens of Kiritappu Wetland Center 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 Plant specimens of Kushiro City Museum Monitoring records of plant species in the Hakone region of Fuji-Hakone-Izu National Park, Japan, 2001-2010 Plant specimens of Horaiji-san Museum of Natural History Kichi T. collection Spermatophytes collection of Okinawa Prefectural Museum & Art Museum Vascular Plant Specimens of the RYU Herbarium (Faculty of Science, University of the Ryukyus) Plant specimens of Bihoro Museum Vascular plant specimens of Sugadaira Research Station, Mountain Science Center, University of Tsukuba Herbarium of Shinshu University Plant specimens of Parthenon Tama Museum (PTHM) Plant specimens of Obihiro Centennial City Museum Vascular plant specimens of Nagano Environmental Conservation Research Institute, Nagano Prefecture Plant Observation Records of Japan Botanical Specimens of Kaizuka City Museum of Natural History (KCMN) Tracheophyta collection of Biodiversity Center of Japan, Ministry of the Environment Vascular plant specimens of The Shirakami Research Center for Environmental Sciences, Hirosaki University Vascular plant specimens of Aomori City Forestry Museum Asahikawa Educational College herbarium Plant specimens of the Museum of Yamagata 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) Plant distribution data with photograph