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Cytotaxonomy of some species of the South American genus Lessingianthus (Asteraceae, Vernonieae)
(Springer Nature, 2012)Mitotic chromosome numbers of 32 populations belonging to 23 species of the genus Lessingianthus H.Rob. (Vernonieae, Asteraceae) were determined. The chromosome number of all examined plants was found to be based on ... -
Karyotype analysis in eight species of Vernonia (Vernonieae, Asteraceae) from South America
(Firenze University Press, 2009)The somatic chromosome number and karyotypes of eight species of Vernonia were analyzed. The results include the first chromosome count for V. hexantha Sch.Bip. (2n=30), which is diploid with base number x=15. The ... -
La identidad de Vernonia setososquamosa (Asteraceae, Vernonieae) : evidencias cromosómicas y palinológicas
(Instituto de Botánica Darwinion, 2010)Vernonia setososquamosa (Asteraceae, Vernonieae) has been considered by several authors as a synonym of V. remotiflora, as a variety of this taxon or a quite different, independent species. We analyzed chromosome and ... -
Nuclear DNA content in some species of Lessingianthus (Vernonieae, Asteraceae) by flow cytometry
(Springer, 2013)The nuclear DNA content was determined for the first time in 25 species of the South American genus Lessingianthus H.Rob. (Vernonieae, Asteraceae) by flow cytometry. This analysis constitutes the first estimation of the ... -
GuaB activity is required in Rhizobium tropici during the early stages of nodulation of determinate nodules, but it is dispensable for the Sinorhizobium meliloti–alfalfa symbiotic interaction
(The American Phytopathological Society, 2005)The guaB mutant strain Rhizobium tropici CIAT8999-10T is defective in symbiosis with common bean, forming nodules that lack rhizobial content. In order to investigate the timing of the guaB requirement during the nodule ... -
Comparison of in vitro solubilization activity of diverse phosphate-solubilizing bacteria native to acid soil and their ability to promote Phaseolus vulgaris growth
(Springer Nature, 2010)To identify plant growth promotion ability of phosphorus-solubilizing native bacteria, we have examined a collection of isolates representing the diversity of culturable phosphate-solubilizing bacteria from acid soils of ... -
Phylogenetics of Gratioleae (Plantaginaceae) : paraphyly of Stemodia and its implications for generic circumscriptions, with insights from floral evolution
(Wiley Blackwell Publishing, Inc, 2022)Gratioleae are the most species-rich tribe of Plantaginaceae in the tropics, spanning c. 30 genera and > 300 species, with a wide range of morphological variation and ecological strategies. As a first effort towards a ... -
Insights into the morphology and evolution of orbicules in the Spermacoce clade (Spermacoceae-Rubiaceae) and implications for systematics
(Wiley Blackwell Publishing, Inc, 2023)The orbicules are tiny structures of sporopollenin that occur on the interior wall of anthers in several groups of plants, and they are associated with pollen grains and tapetal cells. Although their function remains still ... -
Carpellary appendages in Nymphaea and Victoria (Nymphaeaceae) : evidence of their role as osmophores based on morphology, anatomy and ultrastructure
(Wiley Blackwell Publishing, Inc, 2019)In flowers of Nymphaea and Victoria, carpellary appendages are regarded as structures related to pollination by deceit of night-blooming species. In this study, the anatomy, histochemistry and ultrastructure of carpellary ... -
Presence of Leucocoprinus cretaceus and L. fragilissimus in Argentina
(Mycotaxon, Ltd., 2012-07-01)Leucocoprinus cretaceus and L. fragilissimus are recorded for the first time in Argentina. These species are described and illustrated, and a key to the Argentinean species of this genus is presented. -
Mycena moconensis, a new species in section Polyadelphia from Argentina
(Mycotaxon, Ltd., 2012-01-01)A new agaric species, Mycena moconensis, is described from Paranaense Rain Forest, Argentina. This species is characterized by small bicoloured basidiomata with yellow to orange yellow or golden pilei and magenta to purple ... -
Checklist of the argentinean agaricales 6. Paxillaceae, Gomphidiaceae, Boletaceae and Russulaceae
(Mycotaxon, Ltd., 2013-07-01)A checklist of species belonging to families Paxillaceae, Gomphidiaceae, Boletaceae, and Russulaceae was made for Argentina. The list includes all species published up to 2011. Sixteen genera and 54 species are recorded: ... -
Clitocybula azurea in Argentina : redescription and phylogenetic position
(Mycotaxon, Ltd., 2021-01-01)Clitocybula azurea, which was described by Singer in 1973 from Brazil andVenezuela, is characterized by its bluish to grayish blue tinges, narrow lamellae, cespitose and lignicolous habit, and small, amyloid, subglobose ... -
Hygroaster iguazuensis sp. nov. and a new continental record for Lentinus similis
(Mycotaxon, Ltd., 2005-01-01)Hygroaster iguazuensis is proposed as a new species and Lentinus similis is a new record for the Americas. Both fungi are fully described and illustrated. -
Karyotype stability and genome-specific nucleolar dominance in peanut, its wild 4 ancestor, and a synthetic AABB polyploid
(Crop Science Society of America, 2018-07)Allopolyploidy is a significant evolutionary process involved in the origin of many crops, including peanut (Arachis hypogaea L.). The process usually results in a series of chromo- some, genomic and epigenetic rearrangements ... -
High temperatures around flowering in maize : effects on photosynthesis and grain yield in three genotypes
(Crop Science Society of America, 2016-09)To aid breeding for heat-tolerant germplasm we analyzed the effects of high temperatures on the CO2 exchange rate (CER), crop growth rate (CGR), kernel number (KN), and grain yield (GY) in a 30-d period bracketing flowering. ... -
Occurrence of 2n microspore production in diploid interspecific hybrids between the wild parental species of peanut (Arachis hypogaea L., Leguminosae) and its relevance in the genetic origin of the cultigen
(Crop Science Society of America, 2020-06)Unreduced (2n) gametes are the driving force that leads to polyploidization of plants in nature and an important tool for ploidy breeding. Peanut (Arachis hypogaea L., Leguminosae) seems most likely to have originated by ... -
Breeding tetraploid Paspalum simplex : hybridization, early identification of apomicts, and impact of apomixis on hybrid performance
(Crop Science Society of America, 2019-03)Apomictic grasses predominate among tropical forages, and specific breeding techniques are needed for their genetic improvement. The objectives of this study were (i) to generate hybrids by crossing tetraploid sexual and ... -
Mode of reproduction and meiotic chromosome behavior in acroceras macrum
(Crop Science Society of America, 2020-01)Acroceras macrum Stapf is a high-quality C3 grass species adapted to the subtropics. It is a valuable forage resource in frequently flooded environments. The objectives were to analyze the type of polyploidy, mode of ... -
The role of triploids in the origin and evolution of polyploids of Turnera sidoides complex (Passifloraceae, Turneroideae)
(Sociedad Botánica de Japón, 2017-08-22)Triploids can play an important role in polyploid evolution. However, their frequent sterility is an obstacle for the origin and establishment of neotetraploids. Here we analyzed the microsporogenesis of triploids (x = 7) ...
