Phytophthora ramorum (Oomycota) (Werres et al., 2001) is the plant pathogen responsible for the lethal disease of several oak species in California known as sudden oak death. The pathogen also causes a foliar disease on Umbellularia californica (bay laurel or simply bay). Bay leaves have been identifi ed as the major source of natural inoculum in California coastal woodlands. Because of the epi...

ABSTRACT Phytophthora ramorum, causal agent of sudden oak death, is responsible for widespread oak mortality in California and Oregon, and has the potential to infect 100 or more species. Symptoms range from stem girdling and shoot blight to leaf spotting. In this study, we examined the physiological impacts of P. ramorum infection on Rhododendron macrophyllum. In stem-inoculated plants, photos...

The value of the carbon capacity elements green infrastructure makes it possible to find out amount accumulated in plants throughout their life, and, as a result, establish provision city with spaces. Purpose. To investigate Kharkiv city. Methods. Statistical, modeling methods, methods measurement and comparison. Results. Six objects single-breed tree stands were studied: linear protective plan...

Planning conservation of insect herbivores requires knowing what needs to be conserved and developing a set of predictor variables that aid management. We conducted a state-wide survey to examine the species richness of gall wasps (Hymenoptera: Cynipidae) on six oak species dominant in the threatened scrub-oak vegetation in peninsular Florida. Eighty-eight cynipid species were recorded; 23 were...

http://dx.doi.org/10.1016/j.anbehav.2017.03.025 0003-3472/© 2017 The Association for the Study of A Chemical communication in aquatic species can affect many key life history traits, such as prey and predator detection and mate searching. However, changes in the environment can disrupt the effectiveness of signals and the ability of individuals to detect these signals. Many studies have examine...

(Quercus robur crown preferentially expressed) that is differentially expressed during in vitro culture of mature and juvenile-like shoots of Quercus robur L. was identified by differential display. The deduced amino acid sequence showed that the encoded protein is small, contains a predicted N-terminal hydrophobic signal peptide that targets the protein to the cell wall, and is rich in glycine...

Abstract In Tunisia, the oak forest is essentially restricted to north-west (Kroumirie and Mogods), which wettest zone of country. It forms ecosystems great ecological socio-economic interest. This a significant source income for local population. addition, it contributes soil conservation home rich diversified fauna flora offers region picturesque landscape. precious fragile capital currently ...