| chemical composition of tipuana tipu, a source for tropical honey bee products. | tipuana tipu (benth.) kuntze is a tree from the leguminosae family (papilionoideae) indigenous in argentina and extensively used in urbanism, mainly in southern brazil. the epicuticular waxes of leaves and branch, and flower surface were studied by high temperature high resolution gas chromatography. several compounds were characterized, among which the aliphatic alcohols were predominant in branch, leaves and receptacle. alkanes were predominant only in the petals and the aliphatic acids were p ... | 2003 | 12710729 |
| [first record of platycorypha nigrivirga burckhardt (hemiptera: psylloidea), in tipuana tipu (benth.), from brazil]. | the occurrence of platycorypha nigrivirga burckhardt (hemiptera: psyllidae, acizzinae), is reported for the first time, in brazil. the psyllid was observed causing injuries on leaves and shoots of tipuana tipu (benth.), in urban areas of paraná state. p. nigrivirga are tiny sap-sucking insects that feed on phloem and cause curling, stains and fall of leaves. the excrements of these insects accumulate on the leaves propitiating fungus growth on the leaves, or they fall in great amount on the cars ... | 2006 | 17273721 |
| isolation of cryptococcus neoformans and cryptococcus gattii from trunk hollows of living trees in buenos aires city, argentina. | the aim of this work was to describe the distribution of the members of the cryptococcus species complex (cryptococcus neoformans and c. gattii) in hollows of trees from seven parks in buenos aires city, to determine the serotypes and genotypes of these environmental isolates and to compare them with the ones reported in the 2001 survey. four hundred and eighty nine samples were collected by swabbing all trees which had hollows or fissures in the seven parks studied. each tree was sampled once d ... | 2009 | 18654914 |
| [floristic composition and distribution of the andean subtropical riparian forests of lules river, tucuman, argentina]. | we studied the floristic composition and distribution of the riparian forest of two hydrographical systems in a subtropical andean region. using uni and multivariate techniques, we tested the hypotheses that a differentiable riparian forest exists, composed by native vegetation typical of the yungas phytogeographical province, and that the distribution of vegetation varied significantly with geomorphologic characteristics. parallel transects along the water courses were used to collect presence- ... | 2010 | 20411737 |
| flower power: its association with bee power and floral functional morphology in papilionate legumes. | a test was made of the hypothesis that papilionate legume flowers filter pollinators according to their ability to exert strength to open flowers to access rewards. in addition, interactions with pollen vectors were expected to explain the structural complexity of the architecture of these flowers since operative flower strength may be determined by a combination of morphological traits which form part of an intrafloral functional module. | 2011 | 21821623 |
| cryptococcus gattii in urban trees from cities in north-eastern argentina. | in the city of buenos aires, argentina, cryptococcus gattii genotype aflp4/vgi was found to be associated with decaying wood in hollows of different tree species. the aim of this study was to investigate the presence of c. gattii in the environment of riverside cities of the river paraná, and to describe its serotypes and molecular types. five hundred samples were collected in 50 parks by swabbing tree hollows. the samples were inoculated on caffeic acid agar supplemented with chloramphenicol, a ... | 2013 | 23639046 |