Detecting<Emphasis Type="Italic">Orobanche</Emphasis> species by using cpDNA diagnostic markers     

B. Román  C. I. González Verdejo  Z. Satovic  M. D. Madrid  J. I. Cubero  S. Nadal 《Phytoparasitica》2007,35(2):129-135

Some species of the genusOrobanche are among the most devastating parasitic weeds, causing extensive damage in agricultural fields. Considering the difficult control due to seed longevity in the soil, small seed size, high fecundity and a subterranean phase that allows them to parasitize the host before they emerge and become evident, the development of diagnostic markers is highly recommended. In our study we identified potential molecular diagnostic markers from the plastid genome in order to distinguish among the most importantOrobanche species attacking crops in Andalusia, the southern region of the Iberian Peninsula. The study has consideredO. crenata, O ramosa andO. cumana causing serious losses in legumes, solanaceous crops and sunflower fields, respectively, andO. minor that, although abundant in Andalusia, has to our knowledge not yet been found parasitizing agricultural hosts. We amplified a non-coding region from the plastid genome, studied sequence differences among the amplified fragments and digested those of the same length with selected restriction enzymes. Here, we propose a molecular protocol to distinguish the main parasitic plants in crop fields of southern Spain. Different applications such as identification ofOrobanche seeds in soil or crop seed lots are discussed in order to offer right crop recommendations or to prevent new infestation of parasite-free fields. Recommendations for further development of these diagnostic markers are also considered. http://www.phytoparasitica.org posting Jan. 15, 2007.  相似文献   

Magnetic Resonance Imaging of the Normal Canine Larynx   总被引：1，自引：0，他引：1  

J. M. Vázquez  A. Arencibia  F. Gil  J. A. Ramírez  N. González  C. D. Sosa  J. R. Jaber 《Anatomia, histologia, embryologia》1998,27(4):263-270

The purpose of this study was to define the normal anatomic structures in the canine larynx with magnetic resonance images. TI-weighted images were taken in the sagittal and transverse planes. The MR images were obtained comparing MR images to dissection planes. Magnetic resonance imaging provides excellent anatomic detail of laryngeal structures. Therefore, it is of value for diagnostic imaging of some respiratory diseases in the dog.  相似文献   

Afforestation trials with Prosopis chilensis (Mol.) Stuntz and Prosopis flexuosa D.C. in the Dry Chaco, Argentina     

Leonor Cataln  Carlos Carranza  Laura Gonzlez  Ulf Karlin  Marcela Ledesma 《Forest Ecology and Management》1994,70(1-3):113-119

In implantation trials carried out with Prosopis chilensis and Prosopis flexuosa, the following variables were considered: implantation time (December and March), implantation technique (direct seeding and seedling transplantation) and age of the seedlings at the time of transplantation (60, 105 and 150 days). Survival was evaluated for more than 9 months after implantation and trials were repeated in 3 consecutive years.

Results from both species were similar and they show that survival after transplantation was higher (60–80%) than from direct seeding (35–45%). Survival from transplantation was independent of the size and age of the seedlings and it was less affected by climatic conditions than direct field sowing. Survival from direct seeding was higher in March than in December. The best time for either implantation alternative would be the end of the summer or beginning of fall, when climatic conditions increase the probability of seedling survival.  相似文献   

Comparing the performance of generalized diameter-height equations for Maritime pine in Northwestern Spain     

Jörg Schröder  Juan Gabriel Álvarez González 《European Journal of Forest Research》2001,120(1-6):18-23

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Kinetics and mechanism of acetic acid pulping of detannined Pinus pinaster bark     

G. Vázquez  G. Antorrena  J. González 《Wood Science and Technology》1994,28(6):403-408

Summary The observed kinetics of Pinus pinaster bark with acetic acid after alkali treatment, with or without intervening acid prehydrolysis, are satisfactorily explained by a model involving both solubilization and condensation reactions.This study was subsidised by the Xunta de Galicia. J. González is grateful to DGICYT for a research grant  相似文献   

Predicting stand damage and tree survival in burned forests in Catalonia (North-East Spain)     

José Ramón González  Antoni Trasobares  Marc Palahí  Timo Pukkala 《Annals of Forest Science》2007,64(7):733-742

The study developed models for predicting the post-fire tree survival in Catalonia. The models are appropriate for forest planning purposes. Two types of models were developed: a stand-level model to predict the degree of damage caused by a forest fire, and tree-level models to predict the probability of a tree to survive a forest fire. The models were based on forest inventory and fire data. The inventory data on forest stands were obtained from the second (1989–1990) and third (2000–2001) Spanish national forest inventories, and the fire data consisted of the perimeters of forest fires larger than 20 ha that occurred in Catalonia between the 2nd and 3rd measurement of the inventory plots. The models were based on easily measurable forest characteristics, and they permit the forest manager to predict the effect of stand structure and species composition on the expected damage. According to the stand level fire damage model, the relative damage decreases when the stand basal area or mean tree diameter increases. Conversely, the relative stand damage increases when there is a large variation in tree size, when the stand is located on a steep slope, and when it is dominated by pine. According to the tree level survival models, trees in stands with a high basal area, a large mean tree size and a small variability in tree diameters have a high survival probability. Large trees in dominant positions have the highest probability of surviving a fire. Another result of the study is the exceptionally good post-fire survival ability of Pinus pinea and Quercus suber.  相似文献   

Molecular identification of black‐pigmented bacteria from subgingival samples of cats suffering from periodontal disease          下载免费PDF全文

L. Pérez‐Salcedo  E. Laguna  M. C. Sánchez  M. J. Marín  A. O‘Connor  I. González  M. Sanz  D. Herrera 《The Journal of small animal practice》2015,56(4):270-275

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Effect of new ethyl and methyl carbamates on Rhipicephalus microplus larvae and adult ticks resistant to conventional ixodicides     

I.E. Pérez-González  M.G. Prado-Ochoa  M.A. Muñoz-Guzmán  V.H. Vázquez-Valadez  A.M. Velázquez-Sánchez  B.L. Avila-Suárez  C. Cuenca-Verde  E. Angeles  F. Alba-Hurtado 《Veterinary parasitology》2014,199(3-4):235-241

The effects of six new synthetic carbamates on fully engorged females of four Rhipicephalus microplus strains (one reference strain susceptible to conventional ixodicides, two strains multiresistant to ixodicides and one tick field isolate) were compared. In addition, the effect of two other new synthetic carbamates was tested on larvae from the same strains. The first six tested carbamates reduced egg laying and inhibited egg hatching in the four studied strains (P < 0.05). Compared with untreated females, the eggs produced by the treated engorged female ticks of all strains had a dark, dry, opaque appearance and were less adherent. The remaining two tested carbamates induced larval mortality in all of the evaluated strains. The three studied R. microplus strains displayed 50% resistance ratios (RR₅₀) of less than 2 when compared to the susceptible reference strain. These results demonstrate that both carbamates with a larvicidal effect and carbamates that inhibit egg laying and embryo development are efficacious against tick strains that are resistant to commercial ixodicides, no cross resistance was observed.  相似文献   

Influence of provenance,silvicultural regime and tree shape on the quality of maritime pine (Pinus pinaster) timber     

Guillermo Riesco Muñoz  Óscar Santaclara Estévez  Juan Gabriel Álvarez González  Esther Merlo Sánchez 《European Journal of Forest Research》2014,133(4):623-630

The aim of this study was to establish the sources of variation in maritime pine wood properties related to appearance and strength, because of the importance of this wood in the sawing industry in Galicia (NW Spain). Ten trees from each of ten plots of the species (i.e., 100 trees) growing in Galicia were felled and sawn to produce the structural planks required for studying the presence of external strength-reducing characteristics. The planks were sampled from the basal logs to 16 m height in the stems, yielding cross sections of target dimensions 100 × 40 mm to 200 × 200 mm. We propose a model in which individual tree height and dominant height are used to predict the knottiness of planks from trees in mature stands. The abundance of externally visible knots on faces and edges of sawn planks is therefore more dependent on the stand location than on the prior silvicultural treatment of the stand.  相似文献   

<Emphasis Type="Italic"> Xenostrobus securis </Emphasis>(Lamarck, 1819) (Mollusca: Bivalvia): first report of an introduced species in Galician waters     

M. E. Garci  J. E. Trigo  S. Pascual  A. F. González  F. Rocha  A. Guerra 《Aquaculture International》2007,15(1):19-24

The presence of the non-indigenous species, the black-pygmy mussel Xenostrobus securis, is reported here for the first time in an intense shellfish farming area off Galicia (NW Spain). Very high concentrations of this mytilid bivalve have colonized estuarine waters located at the inner part of the Ria de Vigo. The invasive role of X. securis is discussed in the context of the wide ecological tolerance of the species and the recent finding of settlements of this species on numerous colonies of the economically-important blue mussel Mytilus galloprovincialis. The mode of introduction of the black-pygmy mussel is also discussed in relation to human management activities.  相似文献