31 research outputs found
The complex investigation of the colonization potential of Aedes albopictus (Diptera: Culicidae) in the South Pannonian Ecoregion
Effects of Salt Stress on Three Ecologically Distinct Plantago Species
Comparative studies on the responses to salt stress of taxonomically related taxa should
help to elucidate relevant mechanisms of stress tolerance in plants. We have applied this
strategy to three Plantago species adapted to different natural habitats, P. crassifolia and P.
coronopus both halophytes and P. major, considered as salt-sensitive since it is never
found in natural saline habitats. Growth inhibition measurements in controlled salt treatments
indicated, however, that P. major is quite resistant to salt stress, although less than
its halophytic congeners. The contents of monovalent ions and specific osmolytes were
determined in plant leaves after four-week salt treatments. Salt-treated plants of the three
taxa accumulated Na+ and Cl- in response to increasing external NaCl concentrations, to a
lesser extent in P. major than in the halophytes; the latter species also showed higher ion
contents in the non-stressed plants. In the halophytes, K+ concentration decreased at moderate
salinity levels, to increase again under high salt conditions, whereas in P. major K+
contents were reduced only above 400 mM NaCl. Sorbitol contents augmented in all plants,
roughly in parallel with increasing salinity, but the relative increments and the absolute values
reached did not differ much in the three taxa. On the contrary, a strong (relative) accumulation
of proline in response to high salt concentrations (600 800 mM NaCl) was
observed in the halophytes, but not in P. major. These results indicate that the responses to
salt stress triggered specifically in the halophytes, and therefore the most relevant for tolerance
in the genus Plantago are: a higher efficiency in the transport of toxic ions to the
leaves, the capacity to use inorganic ions as osmotica, even under low salinity conditions,
and the activation, in response to very high salt concentrations, of proline accumulation and
K+ transport to the leaves of the plants.MAH was a recipient of an Erasmus Mundus pre-doctoral scholarship financed by the European Commission (Welcome Consortium). AP acknowledges the Erasmus mobility programme for funding her stay in Valencia to carry out her Master Thesis.Al Hassan, M.; Pacurar, AM.; López Gresa, MP.; Donat Torres, MDP.; Llinares Palacios, JV.; Boscaiu Neagu, MT.; Vicente Meana, Ó. (2016). Effects of Salt Stress on Three Ecologically Distinct Plantago Species. PLoS ONE. 11(8):1-21. doi:10.1371/journal.pone.0160236S12111
The quest for canine leishmaniasis in Romania: the presence of an autochthonous focus with subclinical infections in an area where disease occurred
EVIDENCE OF Leishmania (Leishmania) infantum INFECTION IN DOGS FROM JUIZ DE FORA, MINAS GERAIS STATE, BRAZIL, BASED ON IMMUNOCHROMATOGRAPHIC DUAL-PATH PLATFORM (DPP®) AND PCR ASSAYS
Nurses' perceptions of aids and obstacles to the provision of optimal end of life care in ICU
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First molecular evidence of Anaplasma ovis and Rickettsia spp. in keds (Diptera: Hippoboscidae) of sheep and wild ruminants
To evaluate the presence of rickettsial agents in hippoboscid flies with molecular methods, 81 sheep keds (Melophagus ovinus) were collected from 23 sheep, 144 deer keds (Lipoptena cervi) were caught in the environment, and a further 463 and 59 individuals of the latter species were obtained from fresh carcasses of 29 red deer and 17 roe deer, respectively. DNA was extracted individually or in pools. Anaplasma ovis was demonstrated in all examined sheep keds, and from one pool of free-living deer keds. Rickettsia helvetica or other, unidentified rickettsiae were also present in one pool of sheep keds, and in four pools of deer keds from both red deer and roe deer. This is the first account of polymerase chain reaction positivity of hippoboscid flies for A. ovis and rickettsiae. These results raise the possibility that-apart from cattle and roe deer as already reported-sheep and red deer might also play a reservoir role in the epidemiology of rickettsioses