We studied the diversity of oomycetes in a declining reed belt (Phragmites australis) of Lake Constance, Germany, using conventional baiting with specific reed and standard oak baits, accompanied by molecular techniques. Apart from an Aphanomyces sp. and a Phytophthora sp., baiting from reed rhizosphere samples from flooded, as well as drier, littoral sites revealed only Pythium spp. A total of...

This experiment aims at establishing the ability of the endomycorrhizal fungus Glomus intraradices to suppress the plant pathogen Pythium ultimum in cherry tomato. A study published in Canadian Journal of Plant Pathology in 1994 showed that Glomus intraradices suppresses Pythium ultimum in Tagetes patula (french marigold) (St-Arnaud, Fortin, Caron, & Hamel, 1994). Pythium ultimum and other Pyth...

The marine dinoflagellates Peridinium balticum and Peridinium foliaceum are known for bearing diatom endosymbionts instead of peridinin-containing plastids. While evidence clearly indicates that their endosymbionts are closely related, the relationship between the host dinoflagellate cells is not settled. To examine the relationship of the two dinoflagellates, the DNA sequences of nuclear small...

We introduce a new model of traffic flow with phase transitions. The model is obtained by coupling together the classical Lighthill-Whitham-Richards (LWR) equation with the 2 × 2 system described in [A. Aw and M. Rascle, Resurrection of “second order” models of traffic flow, SIAM J. Appl. Math., 60 (2000), pp. 916–938]. We describe the solutions of the Riemann problem, and we compare the result...

Th e morphologic changes in idiopathic epilepsy are largely conside red to be the result ofepileptic attacks, but the lesions them selves may cause seizures . Similar lesion s are also indu ced by hypoxic conditions.s' In some cases , the seizure activity and the consequent ischemi c events may play a role in the development oflesion s occurr ing in status epilepticus;' howe ver , in another st...

Pythium species are considered the most important soil born fungi. They are facultative heterotrophic microorganisms. Under proper conditions, it become highly virulent to plants (depending on the species), causing many diseases, especially in the first stages of growth. These fungi abound in heavy agricultural soil and Egypt is an important source for such fungi that can be transmitted to anot...

An antifungal activity of the twelve plant extracts were tested against Pythium sp., causal agents root rot diseases grown in hydroponic systems. The crude Acorus calamus and Syzygium aromaticum completely inhibited mycelial growth sp. vitro condition at 5,000 ppm, whilst Curcuma zedoaria other had show lesser inhibitory activity. Out these selecting A. calamus, S. C. for further vivo test nurs...