Aureochrome1 is a blue-light-receptor protein identified in a stramenopile alga, Vaucheria frigida. Photozipper (PZ) is an N-terminally truncated, monomeric, V. frigida aureochrome1 fragment containing a basic leucine zipper (bZIP) domain and a light-oxygen-voltage (LOV)-sensing domain. PZ dimerizes upon photoexcitation and consequently increases its affinity for the target sequence. In the pre...

background: cutaneous leishmaniasis is an important health problem caused by leishmania spp . as there is no vaccine, drug treatment is the only way to tackle leishmaniasis. in the present study, inhibitory and kill­ing effects of peganum harmala and alkana tinctoria extracts on amastigotes and promastigotes forms of leishmania were evaluated in-vitro. methods: the seeds of peganum harmala, ste...

Phytophthora species are well-known as destructive plant pathogens, especially in natural ecosystems. It is ironic, therefore, how little is known regarding the Phytophthora diversity in South African natural woody ecosystems. In this study, Phytophthora species were isolated using standard baiting techniques from 182 soil and water samples and these were identified based on ITS and coxI sequen...

FLOWERING LOCUS C (FLC), a strong floral repressor, is one of the central regulators of flowering in Arabidopsis thaliana. The expression of FLC is increased by FRIGIDA (FRI) but decreased by vernalization, a long period of cold exposure that accelerates flowering. Although many aspects of FLC regulation have been reported, it is not known how FLC is transcriptionally activated by FRI at the mo...

Flowering at the appropriate time is crucial for reproductive success and is strongly influenced by various pathways such as photoperiod, circadian clock, FRIGIDA and vernalization. Although each separate pathway has been extensively studied, much less is known about the interactions between them. In this study we have investigated the relationship between the photoperiod/circadian clock gene a...

Three new species of oribatid mites of the family Oppiidae (Oribatida, Oppioidea), belonging to the genera/subgenera Tripiloppia Hammer, 1968 and Lanceoppia (Baioppia) Luxton, 1985, are described from Central Otago, South Island, New Zealand. Tripiloppia frigida sp. nov. is morphologically similar to T. dalenii Hammer, 1968, but differs from the latter by the lanceolate bothridial setae, five p...

the current study was assigned to evaluate the total phenol, total flavonoid content (tpc, tfc) and antioxidant properties of extracts from the aerial parts of scrophularia frigida (s. frigida). extracts were also tested by preliminary phytochemical screening as well as cytotoxic activity against artemia salina, mcf-7 (human breast carcinoma) and sw-480 (colon carcinoma) and l-929 (normal) cell...

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