Portrayal of <i>Impatiens nzabiana</i> (Balsaminaceae): a Morphological, Molecular and Biogeographic Study of a New Gabonese Species

Janssens, Steven; Dessein, Steven; Smets, Erik

doi:10.1600/036364411x569624

Cited by 14 publications

(9 citation statements)

References 33 publications

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“…Each year, several new species are described (e.g. Janssens et al , 2009 b , 2010, 2011, 2018; Abrahamczyk et al , 2016; Fischer et al , 2017). Its representatives are mainly growing in montane forests of the Old World tropics and sub-tropics (Yuan et al , 2004; Janssens et al , 2006).…”

Section: Introductionmentioning

confidence: 99%

Nectar traits differ between pollination syndromes in Balsaminaceae

et al. 2019

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Background and Aims The attractiveness of nectar rewards depends both on the quantity of nectar produced and on its chemical composition. It is known that nectar quantity and chemical composition can differ in plant species depending on the main pollinator associated with the species. The main aims of this study were to test formally whether nectar traits are adapted to pollination syndromes in the speciose Balsaminaceae and, if so, whether a combination of nectar traits mirrors pollination syndromes. Methods Comparative methods based on Ornstein–Uhlenbeck models were used to test whether nectar volume, nectar sucrose proportion, sugar and amino acid concentration and amino acid composition had evolved as a function of pollination syndromes in 57 species of Balsaminaceae. Cluster analysis and ordination were performed to derive clusters of species resembling each other in nectar composition. Key Results Evolutionary models for nectar volume and nectar sucrose proportion performed best when including information on pollination syndrome, while including such information improve model fit neither for sugar and amino acid concentration nor for amino acid composition. A significant relationship emerged between pollination syndrome and the combined nectar traits. Conclusions Our results show that nectar volume and nectar sucrose proportion evolve rapidly towards optimal values associated with different pollination syndromes. The detection of a signal indicating that nectar traits in combination are to a certain extent able to predict pollination syndromes in Balsaminaceae suggests that a holistic approach including the whole set of nectar traits helps us to better understand evolution of nectar composition in response to pollinators.

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Section: Introductionmentioning

confidence: 99%

Nectar traits differ between pollination syndromes in Balsaminaceae

et al. 2019

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“…Since comprehensive pollen morphological study on angiosperms, including Impatiens pollen, several palynological studies have been carried out that focused on the pollen morphology of Impatiens (Narayana & Sayeeduddin, 1959;Huynh, 1966Huynh, , 1968Bhaskar & Razi 1973, 1979Tara & Namboodri, 1974;Bhaskar & al., 1975;Moore & Webb, 1978;Grey-Wilson, 1980b;Lu, 1991;Perveen & Qaiser, 2001;Janssens & al., 2005Janssens & al., , 2009aJanssens & al., , 2011Vinckier & al., 2012). Despite these studies, the pollen morphology of Impatiens is still underexamined due to the large size of the genus.…”

Section: Introductionmentioning

confidence: 99%

A total evidence approach using palynological characters to infer the complex evolutionary history of the Asian Impatiens (Balsaminaceae)

Janssens¹,

Wilson

Yuan

et al. 2012

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The present study contributes to a better understanding of major palynological trends in Impatiens, one of the largest genera in angiosperms, and evaluates the phylogenetic usefulness of pollen morphological characters in the genus. The pollen morphological diversity of 115 Asian species of the genus was investigated using light microscopy and scanning electron microscopy and analyzed in a phylogenetic framework using Bayesian inference and Bayesian posterior character mapping as well as parsimony character optimization. Despite the rather young age of Impatiens and its extremely rapid radiation, a striking palynological variability could be observed. The ancestral pollen type in Impatiens is a triangular, tri–aperturate pollen grain with reticulate sexine ornamentation, which subsequently evolved into the main Impatiens pollen type: a 4–aperturate, rectangular pollen grain with a reticulate sexine ornamentation. The most recently diversified Asian clades are characterized by several reversions from 4–aperturate to 3–aperturate and changes in sexine ornamentation from reticulate to microreticulate sexine ornamentation. Also differences in pollen view can be observed amongst the most recently diversified Asian lineages ranging from circular, quadrangular, elliptic to sub–elliptic and rectangular. Although some pollen morphological characters seem to be homoplasious, others help to improve the resolution of some phylogenetically problematic lineages in the genus.

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“…The current taxonomic framework for continental Africa was established by Grey-Wilson (1980) who recognised 110 species in his monograph. Since then, 24 further species have been published (Abrahamczyk et al 2016; Bos 1991; Cheek and Csiba 2002; Cheek and Fischer 1999; Cheek et al 2022; Fischer 1997; Fischer et al 2003; 2021; Frimodt-Möller and Grey-Wilson 1999; Grey-Wilson 1981; Hallé and Louis 1989; Janssens et al 2009a; 2010; 2011; 2015; 2018; Pócs 2007). The three broad centres of species diversity in tropical Africa are the western African mountains, primarily the Cameroon Highlands (28 species), the E. Arc mountains of Tanzania with the Kenya Highlands (24 species) and the Albertine Rift (20 species) (Fischer et al 2021).…”

Section: Introductionmentioning

confidence: 99%

A new, Critically Endangered species of Impatiens (Balsaminaceae) from the coastal plain of the Republic of Congo

Cheek

2022

Preprint

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Impatiens moutsambotei is described from a herbarium specimen collected at a waterfall in forest on the coastal plain, below the Mayombe Mts of the Republic of Congo. Sharing many distinctive characters with Impatiens floretii of the Doudou Mts of Gabon, it is abundantly distinguished inter alia by the leaf-blades which are lanceolate or narrowly elliptic, not ovate, their bases acute, not obtuse or broadly rounded to truncate; the reduced, peduncular bracts bearing long, filiform setae, and not entire; the proximal (upper) of the lateral united petals are entire, not bifid; the spur is curved at the base and overlaps the lower sepal, not curved through its length to describe a semi-circle and held below the lower sepal. Both species are placed in the Impatiens macroptera species aggregate. Impatiens moutsambotei is known from a single site, where it was collected nearly 30 years ago and not seen since. The new species is assessed as Critically Endangered due to threats of habitat clearance from mining and road widening, and may be already be extinct.

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Portrayal of Impatiens nzabiana (Balsaminaceae): a Morphological, Molecular and Biogeographic Study of a New Gabonese Species

Cited by 14 publications

References 33 publications

Nectar traits differ between pollination syndromes in Balsaminaceae

Nectar traits differ between pollination syndromes in Balsaminaceae

A total evidence approach using palynological characters to infer the complex evolutionary history of the Asian Impatiens (Balsaminaceae)

A new, Critically Endangered species of Impatiens (Balsaminaceae) from the coastal plain of the Republic of Congo

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