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The complete chloroplast genome sequence of Taxillus yadoriki (Loranthaceae): a hemi-parasitic evergreen shrub in East Asia.

ABSTRACT: Taxillus yadoriki (Loranthaceae) is a hemiparasitic evergreen shrub distributed in Korea and Japan. We report the complete chloroplast genome of T. yadoriki to provide insight into the phylogenetic relationship of Loranthaceae. This genome is 122,192 bp long, with two IR regions (22,756 bp each) that separate a large single-copy (LSC) region (70,628 bp) and a small single-copy (SSC) region (6052 bp). It contains 109 genes that encode 68 proteins, 8 rRNAs, and 33 tRNAs. All of ndh genes have been lost and the SSC region consists of only four genes similar to other Taxillus species. In ML phylogenetic, monophyly of Taxillus was strongly supported with high bootstrap value and formed a sister group with Scurrula.

SUBMITTER: Cho WB

PROVIDER: S-EPMC7781972 | biostudies-literature |

REPOSITORIES: biostudies-literature

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Project description:The transition from tropical to subtropical (warm temperate) evergreen forests is more clearly apparent in East Asia, from Nepal to the western Pacific coast, than elsewhere in the tropics. We review the nature of this transition and hypothesize the physical, ultimately climatic, factors that may maintain it, with a special focus on how the increasing instability and warming of climates will affect these forests. A primary climatic mediator of the transition is proposed, thereby offering a testable hypothesis for the climate-forest transition relationship. What is known of this transition is summarized in context of the primary climatic mediators of elevational zonation of forest formations in equatorial Asia to the tree line, in the Himalaya at the India-Indo-Burma northern tropical margin, and as both elevational and latitudinal zonation in southern China. Consequent secondary edaphic and other physical changes are described for the Himalaya, and hypothesized for southern China. The forest ecotones are seen to be primarily defined by tree floristic change, on which account changes in structure and physiognomy are determined. The montane tropical-subtropical transition in the Himalaya is narrow and observed to correlate with an as yet ill-defined frost line. A distinct tropical-subtropical transition forest is recognized in the southwest China mountains. There is a total change in canopy species at the Himalayan ecotone, but subcanopy tropical species persist along an elevational decline of c. 400 m. The latitudinal transition in South China is analogous, but here the tropical subcanopy component extends north over ten degrees latitude, albeit in decline. The tropical-subtropical transition is uniquely clear in East Asia because here alone a tropical wet summer-dry winter monsoon extends to 35° north latitude, encompassing the subtropical evergreen forest, whereas subtropical evergreen forests elsewhere exist under drier temperate summer climate regimes.

Dataset Information

The complete chloroplast genome sequence of Taxillus yadoriki (Loranthaceae): a hemi-parasitic evergreen shrub in East Asia.

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