The complete chloroplast genome of Impatiens mengtszeana (Balsaminaceae), an endemic species in China

The Mexican Balsam, Impatiens mexicana Rydb: A Redescription Based on Morphological and Phylogenetic Studies, with an Update of the Current Geographical Range of the Species

“…The low support values and lack of resolution of American species when atpb-rbcL and trnL-F are used separately, also suggests regions are not convenient when inferring phylogenetic positions in species with probable recent evolutionary histories. In confronting these situations, there is a need to, in future, include other types of elements, so as to gain a better overview of both types of relationships; one example is the use of complete chloroplast genomes, which several proposals in balsams have already addressed [26,[36][37][38][39]. Likewise, the species delimitation of Impatiens could be improved by using current techniques, including the multispecies coalescent method (MSC), which offers a framework for estimating evolutionary parameters, such as migration rates or intensity of introgression, and provides a useful way to apply empirical criteria to delimit species or generate hypotheses about the current state of species, and integrate the findings with evidence obtained from other fields, such as morphology and ecology.…”

“…Phylogenetic studies of Impatiens have been carried out in different world regions; for example, [15,[18][19][20] principally used the cpDNA and nrDNA regions, and others have combined DNA sequences and morphological attributes [15]. However, recent investigations have included phylogenetic proposals with complete plastomes (e.g., [26,[34][35][36][37][38][39]). Different phylogenetic studies have been conducted, including by [19], who carried out the most comprehensive phylogenetic study of American species, which encompassed six (I. aurella, I. capensis, I. ecornuta, I. noli-tangere, I. turrialbana, and I. pallida) of seven species, showing their aggregation with seven species from central China.…”

Impatiens beipanjiangensis (Balsaminaceae), a new species from Guizhou, China

“…The genus Impatiens L. is a member of the family Balsaminaceae , which contains over 1000 species worldwide, including approximately 270 species in China, primarily distributed in tropical and subtropical regions, such as Africa, India, south-western Asia, southern China and Japan, with a few species also being found in Europe, Siberia and northern China ( Grey-Wilson 1980 ; Yu 2012 ; Li et al 2022 ). Impatiens is characterised by stem fleshy, flowers bisexual and bisymmetric, with the lateral petals, spurred zygomorphic flowers with fused stamens surrounding the ovary and stigma and fruit an explosive capsule ( Ruchisansakun et al 2015 ).…”

“… Impatiens is characterised by stem fleshy, flowers bisexual and bisymmetric, with the lateral petals, spurred zygomorphic flowers with fused stamens surrounding the ovary and stigma and fruit an explosive capsule ( Ruchisansakun et al 2015 ). The genus, however, has become notoriously difficult for species classification and identification due to its complex morphological traits, small and endemic areas of occurrences, difficult preservation of plant specimens and difficult phylogenetic resolution at the infrageneric level ( Li et al 2022 ).…”