Angela Virginia Etcheverry

• Professor
• Professor (Full) at National University of Salta

Several floral traits in Papilionoideae (Fabaceae) have been correlated to certain pollination mechanisms. To test this hypothesis, we analyzed 20 qualitative and 21 quantitative floral traits of 17 species of Papilionoideae with keel flowers from various tribes and genera native to Salta, Argentina, which are representative of the four general pol...

A Correction to this paper has been published: https://doi.org/10.1038/s41396-021-00963-5

Bacteriophages play significant roles in the composition, diversity, and evolution of bacterial communities. Despite their importance, it remains unclear how phage diversity and phage-host interactions are spatially structured. Local adaptation may play a key role. Nitrogen-fixing symbiotic bacteria, known as rhizobia, have been shown to locally ad...

Bacteriophages play significant roles in the composition, diversity, and evolution of bacterial communities. Despite their importance, it remains unclear how phage diversity and phage-host interactions are spatially structured. Local adaptation may play a key role. Nitrogen-fixing symbiotic bacteria, called rhizobia, have been shown to locally adap...

The South American Cochliasanthus caracalla (L.) Trew (=. Vigna caracalla (L.) Verdc.) has the most complex flower among Papilionoideae. In this study we describe a) floral functional morphology, b) nectary and nectar traits, and c) floral visitors' behaviour. The flower presents an intricate connection of flower parts which allows mechanical coope...

The pump pollination mechanism is typical of basal clades within Papilionoideae and might be associated with less efficient pollen transfer systems, while the explosive tripping mechanism is considered more advanced and might represent the highest expression of the trend in pollen economy. Crotalaria pumila, C. stipularia, Desmodium incanum and D....

In the papilionaceous flowers with explosive pollination mechanism, the androecium and the gynoecium are subjected to great pressure in the keel. It has been suggested that at the first visit nearly all pollen grains are released and that the floral parts do not return to their original positions; this would be a cue for pollinators to avoid activa...

Argentina is one of the most diverse countries in the world due to its species richness and endemism. A survey was carried out to categorize medicinal Angiosperms weeds found in Salta Province. We found that Dicotyledones constitutes 92.1%, with 65 families and 232 genera. Asteraceae turned out to be the family with the largest number of used taxa...

Plants in the genus Erythrina are pollinated by birds, such that passerine pollination is the plesiomorphic state, whereas hummingbird pollination is the derived character. Phylogenetic studies suggest that Erythrina dominguezii belongs to a basal clade characterised as pollinated by both passerines and hummingbirds. Here, we characterise the polli...

The pollen:ovule ratio (P⁄O) has traditionally been used as a rough estimator of plant breeding systems. It has been shown that plant breeding systems are associ- ated with particular floral traits. In this study, we determined the P⁄O in 21 Legu- minosae species from Argentina and explored relationships between P ⁄ O and taxonomic position, flower...

Plants in the genus Erythrina are pollinated by birds, such that passerine pollination is the plesiomorphic state, whereas hummingbird pollination is the derived character. Phylogenetic studies suggest that Erythrina dominguezii belongs to a basal clade characterised as pollinated by both passerines and hummingbirds. Here, we characterise the polli...

We studied the growth habit and root anatomy on two species of the Macroptilium genera, Fabaceae. These species, potential forages, are native to the Northwest Provinces in Argentina. The aims of this paper were to determine the survival capacity of the study species relating its growth habit and persistence with morphological and anatomical featur...

The pollen:ovule ratio (P/O) has traditionally been used as a rough estimator of plant breeding systems. It has been shown that plant breeding systems are associated with particular floral traits. In this study, we determined the P/O in 21 Leguminosae species from Argentina and explored relationships between P/O and taxonomic position, flower size,...

La mayoría de las Papilionoideae (Leguminosae) tienen flores complejas de simetría zigomorfa. La flor tiene tres tipos de pétalos: un estandarte o vexilo, dos alas y dos pétalos formando la quilla. Las flores son principalmente visitadas por abejas (de diferentes tamaños e identidad taxonómica). La deposición y remoción del polen ocurren a través d...

The repeated evolutionary transition from outcrossing to self-fertilization in angiosperms has been suggested to occur because selfing provides reproductive assurance. This transition is commonly associated with modifications of floral traits, among them herkogamy (the spatial separation between dehiscing anthers and the receptive stigma). Here, we...

As a first step in the characterization of native species of Papilionoideae from Northwestern Argentina with potential use as ornamentals, we determined the life cycle and floral characteristics of 21 species. It was observed that most species are perennial herbaceous plants. In most of them, the aerial part dies in winter time leaving an innovatio...

Traditional breeding of ornamentals has led to a scent reduction of many floricultural varieties due to a negative correlation between flower longevity and fragrance. Vigna caracalla L. Verdc. (Leguminosae: Papilionoideae) produces large flowers with an intense, pleasant fragrance. The objective of this study was to identify, using headspace analys...

Phenotypic plasticity in floral traits associated with mating systems has been demonstrated for many species. However, few studies have explored the existence of plasticity in pollen and ovule production. This is important because plant mating systems are often estimated as pollen:ovule ratio. In this chapter we determine the existence of phenotypi...

Vigna caracalla has the most complex flower among asymmetrical Papilionoideae. The objective of this study was to understand the relationships among floral characteristics, specialization, mating system and the role of floral visitors under different ecological contexts. Five populations were studied in north-western Argentina, from 700 to 1570 m a...

Reproductive phenology, floral biology, degree of self-incompatibility, and floral visitors of Erythrina falcata were studied in an Argentinean population. Flowering occurs during the dry season from late August to late October. Flower lifetime is 5–6 d. Phylogenetic studies indicate that E. falcata, together with E. fusca and E. crista-galli, are...

We investigated the reproductive biology of Crotalaria micans, a colonizing species that occurs in disturbed sites. The flowers have two whorls of stamens with differential growth and dimorphic anthers. The inner anthers serve two functions: 1) to cooperate with the stylar brush in the pollen presentation, and 2) to push the remaining pollen within...