Growth forms in Pappophoreae (Poaceae)

Tivano, J. C.; Vegetti, Abelardo Carlos

doi:10.1016/j.flora.2009.12.003

Cited by 5 publications

(3 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The plant height is also useful for the identification of A. arenarius and is incorporated in the study character "synflorescence length," SL). For the selection of variables to be measured, the inflorescences were interpreted according to Vegetti and Mu ¨ller-Doblies (2004), Tivano and Vegetti (2010), and Nagahama et al (2013). The term "axillary fascicle" (AF) was used to describe the full proximal set of branches originating from the prophylls and the proximal bract.…”

Section: Methodsmentioning

confidence: 99%

Taxon Delimitation in the <I>Andropogon lateralis</I> Complex (Poaceae) in Southern South America based on Morphometrical Analyses

2014

View full text Add to dashboard Cite

In the tribe Andropogoneae, morphological variation is remarkable, mainly in the inflorescence on the pair of spikelets which are the core elements of the inflorescence. The genus Andropogon includes the Andropogon lateralis complex, which is distributed primarily in South and Central America, comprising approximately twelve taxa and inter-specific hybrids. The aim of this study was to assess morphological variation in the A. lateralis complex through morphometric analyses of specimens from natural populations. For this purpose, univariate ANOVA, as well as principal component analysis and discriminant analysis of 19 morphological variables of synflorescences were performed, revealing differences between species and interspecific hybrids. The selected diagnostic traits of species and hybrids based on quantitative characters of the synflorescences provided a valuable tool for taxonomic studies in the genus. The results obtained made it possible to generate the first identification key that includes both species and hybrids of the A. lateralis complex for South America.

show abstract

Section: Methodsmentioning

confidence: 99%

Taxon Delimitation in the <I>Andropogon lateralis</I> Complex (Poaceae) in Southern South America based on Morphometrical Analyses

2014

View full text Add to dashboard Cite

show abstract

“…Generally speaking, the total number and the ramification pattern of first-order branches is a polymorphic character amongst individuals of one species. Studies that include comparative data on the number and ramification of first-order branches show that these traits vary widely amongst grass species and genera (Doust & Kellogg, 2002;Kern et al, 2008;Perreta & Vegetti, 2004;Pilatti & Vegetti, 2014;Reinheimer & Vegetti, 2008;Reinheimer, Astegiano, & Vegetti, 2005b;Reinheimer, Pozner, & Vegetti, 2005a;Tivano & Vegetti, 2004).…”

Section: Variations In the Inflorescencementioning

confidence: 99%

Diversity, systematics, and evolution of Cynodonteae inflorescences (Chloridoideae – Poaceae)

Pilatti

Muchut

Uberti-Manassero

et al. 2017

Systematics and Biodiversity

View full text Add to dashboard Cite

The species of the Cynodonteae tribe show great morphological diversity in their reproductive structures. Previous studies where inflorescences were comparatively analysed in the context of phylogeny have shown that although grass inflorescences seem to be excessively variable, there are certain aspects of inflorescences that store relevant information on the evolution and systematics in Poaceae. We have analysed and compared the inflorescence structures of species belonging to the Hilariinae, Monanthochloinae, Scleropogoninae, and Muhlenbergiinae subtribes. Considering the most relevant morphological characters, the most recurrent types of inflorescences in the lineage were determined by means of a principal coordinates analysis. To understand the evolution of inflorescence morphology, ancestral reconstructions of inflorescence characters were performed using the Bayesian inference method. The results obtained demonstrate that the processes of homogenization and truncation might account for the diversity observed in adult inflorescences. Five different types of inflorescences were identified out of 36 theoretical possibilities. Amongst these, inflorescence type 1 (panicle of spikelets, with a terminal spikelet, non-homogenized, and bearing third-or higher-order branches) was found to be the most frequent in the studied group. Ancestral reconstructions of morphological characters allowed us to suggest that the ancestor of the group might have had an inflorescence with the form of a raceme of spikelets, non-truncated and bearing first-order branches. More complex inflorescences bearing no terminal spikelets and having branches of higher order might have diverged this lineage.

show abstract

“…In general, the five species of the B. curtipendula complex studied here are the species that produce a high number of long primary branches (55-74), unlike B. chasei, B. dimorpha, B. hirsuta, B. scorpioides and B. simplex, which bear 1 or 2 long primary branches. The number of primary branches was also found to be a highly variable character in species of Spartina (Kern et al, 2008), Brachiaria, Urochloa, Eriochloa, Chaetium, Megathyrsus, Melinis (Reinheimer and Vegetti, 2008), Sporobolus (Reinheimer et al, 2005a), Pappophorum (Tivano and Vegetti, 2004), Panicum (Reinheimer and Vegetti, 2005b) and Melica (Perreta and Vegetti, 2004).…”

Section: Variations In the Uifmentioning

confidence: 99%

Diversity of inflorescences in the Boutelouinae subtribe (Poaceae: Chloridoideae: Cynodonteae)

Pilatti

Vegetti

2014

Flora - Morphology, Distribution, Functional Ecology of Plants

View full text Add to dashboard Cite

Growth forms in Pappophoreae (Poaceae)

Cited by 5 publications

References 16 publications

Taxon Delimitation in the <I>Andropogon lateralis</I> Complex (Poaceae) in Southern South America based on Morphometrical Analyses

Taxon Delimitation in the <I>Andropogon lateralis</I> Complex (Poaceae) in Southern South America based on Morphometrical Analyses

Diversity, systematics, and evolution of Cynodonteae inflorescences (Chloridoideae – Poaceae)

Diversity of inflorescences in the Boutelouinae subtribe (Poaceae: Chloridoideae: Cynodonteae)

Contact Info

Product

Resources

About