Gametophyte-to-sporophyte transition in the haploid-diploid life cycle depends on fertilization of male and female gametes. We describe here a mutant marine red seaweed Neopyropia yezoensis, designated akasusabi (aks), where gametophyte-to-sporophyte occurs independently fertilization. Although conchocelis filaments were produced from carpospores, severe defects maturation carposporangia via mi...

Differentiation of malaria parasites into sexual forms (gametocytes) in the vertebrate host and their subsequent development into gametes in the mosquito vector are crucial steps in the completion of the parasite's life cycle and transmission of the disease. The molecular mechanisms that regulate the sexual cycle are poorly understood. Although several signal transduction pathways have been imp...

The multicellular green alga Enteromorpha (Ulvales, Chlorophyta) includes some economically valuable species cultivated as "Aonori" (green laver) in Japan. The life cycle of the genus Enteromorpha consists of gametophytic and sporophytic foliaceous thalli, which are indistinguishable in appearance. Both male and female gametes of E. compressa can grow parthenogenetically and can be cloned into ...

With malaria a resurging public health problem in much of the tropical world, the search for newer methods to combat this disease has been intensified. Current research is multifaceted, directed toward the development of better means of mosquito control, new chemotherapeutic drugs, and an effective vaccine. Malaria is caused by a protozoan parasite with a complex life cycle and several differen...

this paper presents the results obtained from the life cycle assessment (lca) of the productionof sicilian artichokes (cynara scolymus) with the aim of reducing impacts, interpreting the results, suggesting possible improvements and enriching the sustainability knowledge already existing in the agro food field. artichokes represent one of the excellent italian agricultural products even if stil...

urban sinks accumulate phosphorus and other elements and may serve as sources of secondaryraw materials. this paper evaluates phosphorus sources based on their environmental impact. in a life cycleassessment (lca) the conventional production was used as a yardstick against which tomeasure the performanceof two recycling options: spreading of sewage sludge and phosphorus recovery from municipal ...

magnetic levitation (maglev) is amongst the most advanced technologies that are available to the transportation industries. it has already been noticed by decision makers in many countries around the globe. contrary to such high levels of interest, there are no practical algorithms available to the engineers and/or managers to assist them in analyzing economics of the maglev systems. therefore,...

Gametogenesis is a process whereby a germ cell differentiates into haploid gametes. We found that, in budding yeast, replicatively aged cells remove age-induced cellular damage during gametogenesis. Importantly, gametes of aged cells have the same replicative potential as those derived from young cells, indicating that life span resets during gametogenesis. Here, we explore the potential mechan...

Review of behavior in K . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 309 Methods. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 310 Fertility.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...