Phylogenomics of the plant family Araceae

Henriquez, Claudia L.; Arias, Tatiana; Pires, J. Chris; Croat, Thomas B.; Schaal, Barbara A.

doi:10.1016/j.ympev.2014.02.017

Cited by 109 publications

(100 citation statements)

References 54 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Parks et al., ; Moore et al., ; Jansen et al., ), including monocot orders (e.g. Givnish et al., ; Steele et al., ; Barrett et al., , ), and Araceae in Alismatales (Henriquez et al., ). These larger data sets offer unparalleled opportunities for revisiting higher‐order relationships left unresolved in earlier studies, but they also present new analytical challenges related to large‐scale data and the diversity of DNA substitutional dynamics in their component genes or character sets (data partitions) (e.g.…”

mentioning

confidence: 99%

Plastid phylogenomics and molecular evolution of Alismatales

et al. 2015

Self Cite

View full text Add to dashboard Cite

Past phylogenetic studies of the monocot order Alismatales left several higher-order relationships unresolved. We addressed these uncertainties using a nearly complete genus-level sampling of whole plastid genomes (gene sets representing 83 proteincoding and ribosomal genes) from members of the core alismatid families, Tofieldiaceae and additional taxa (Araceae and other angiosperms). Parsimony and likelihood analyses inferred generally highly congruent phylogenetic relationships within the order, and several alternative likelihood partitioning schemes had little impact on patterns of clade support. All families with multiple genera were resolved as monophyletic, and we inferred strong bootstrap support for most inter-and intrafamilial relationships. The precise placement of Tofieldiaceae in the order was not well supported. Although most analyses inferred Tofieldiaceae to be the sister-group of the rest of the order, one likelihood analysis indicated a contrasting Araceae-sister arrangement. Acorus (Acorales) was not supported as a member of the order. We also investigated the molecular evolution of plastid NADH dehydrogenase, a large enzymatic complex that may play a role in photooxidative stress responses. Ancestralstate reconstructions support four convergent losses of a functional NADH dehydrogenase complex in Alismatales, including a single loss in Tofieldiaceae.

show abstract

mentioning

confidence: 99%

Plastid phylogenomics and molecular evolution of Alismatales

et al. 2015

Self Cite

View full text Add to dashboard Cite

show abstract

“…; Henríquez et al . ) possesses a wealth of host‐searching strategies that ranges from random (e.g. Heteropsis, Balcázar‐Vargas et al .…”

Section: Discussionmentioning

confidence: 99%

No second chances: demography from the forest floor to the canopy and back again

2015

View full text Add to dashboard Cite

Summary Secondary hemiepiphytes have one of the most bizarre life histories among vascular plants. They germinate on the forest floor, climb onto a host tree, gradually grow up and start producing seeds if the host tree is taller than the minimum height required for reproductive onset. Because most of the host trees in the forest are too small to allow reproduction, most seedlings of secondary hemiepiphytes of the genus Heteropsis climb onto unsuitable hosts. This problem may be remediated by moving from unsuitable to suitable hosts by vegetative propagation, providing a second chance to contribute to recruitment. Still, such a strategy comes at a demographic risk of increased mortality and may thus contribute little to population growth. Here we ask what are the relative contributions of Heteropsis individuals on suitable vs. unsuitable hosts to their population growth rates (λ). We studied the demography of three species of the genus Heteropsis in the Colombian Amazon, distinguishing subpopulations on suitable and unsuitable hosts. We constructed multistate matrix population models and performed elasticity and loop analyses. For all three Heteropsis species, λ ≥ 1, indicating that studied populations are viable. Vital rates and loop elasticities showed that individuals on suitable hosts contributed 85–98% and 80–96%, respectively. Consequently, individuals that climb directly to suitable hosts predominantly drive the population dynamics of the three studied Heteropsis species and second chances (vegetative reproduction) do not matter for demographic viability. Our results are evidence of a strong source–sink dynamic for the studied species, whereby individuals on unsuitable hosts act as sink subpopulations and individuals on suitable hosts as source subpopulations. The population growth rates of the examined Heteropsis species were strongly limited by recruitment of individuals on suitable hosts and the high proportion of seedlings climbing onto unsuitable hosts, which are demographic ‘lost cases’. Synthesis. Our study illustrates a strong environmental filtering and multiple bottlenecks in the life cycle of secondary hemiepiphytes. Our findings contribute with an understudied plant life‐history strategy to the extensive repertoire of better‐known ecological plant strategies such as tree gap dynamics, clonal reproduction and permanent seedbanks.

show abstract

“…In the most derived species, none of the conventional vegetative parts of angiosperms are recognizable and the whole plant is more reminiscent of an alga than of a plant with roots, stem, branches and leaves. Duckweeds (Araceae: lemnoideae) have been found to represent a basally splitting lineage within the arum family (Henriquez et al 2014), but their vegetative structure is the most unusual among the flowering plants: the whole photosynthetic structure is represented here by an irregular disk-shaped body, or by a small cluster of such small, floating bodies, out of which one or more roots sprout out. The ultimate member of this lineage is Wolffia arrhiza (L.) Horkel ex Wimm., a simple subspherical blob of green matter, perhaps one millimeter in diameter.…”

Section: The Scope Of Variationmentioning

confidence: 99%

Biological Systematics in the Evo-Devo era

Minelli

2015

EJT

View full text Add to dashboard Cite

Abstract. evolutionary developmental biology (evo-devo) suggests a distinction between modular and systemic variation. in the case of modular change, the conservation of the overall structure helps recognizing affinities, while a single, fast evolving module is likely to produce a bonanza for the taxonomist, while systemic changes produce strongly deviating morphologies that cause problems in tracing homologies. Similarly, changes affecting the whole life cycle are more challenging than those limited to one stage. Developmental modularity is a precondition for heterochrony. Analyzing a matrix of morphological data for paedomorphic taxa requires special care. it is, however, possible to extract phylogenetic signal from heterochronic patterns. The taxonomist should pay attention to the intricacies of the genotype→phenotype map. When using genetic data to infer phylogeny, a comparison of gene sequences is just a first step. To bridge the gap between genes and morphology we should consider the spatial and temporal patterns of gene expression, and their regulation. Minor genetic change can have major phenotypic effects, sometimes suggesting saltational evolution. evo-devo is also relevant in respect to speciation: changes in developmental schedules are often implicated in the divergence between sympatric morphs, and a developmental modulation of 'temporal phenotypes' appears to be responsible for many cases of speciation.

show abstract

Phylogenomics of the plant family Araceae

Cited by 109 publications

References 54 publications

Plastid phylogenomics and molecular evolution of Alismatales

Plastid phylogenomics and molecular evolution of Alismatales

No second chances: demography from the forest floor to the canopy and back again

Biological Systematics in the Evo-Devo era

Contact Info

Product

Resources

About